diff --git a/.gitignore b/.gitignore
index 0743489f8ec..b6b4a1a559a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ NashornProfile.txt
 **/JTreport/**
 **/JTwork/**
 /src/utils/LogCompilation/target/
+/src/utils/LogCompilation/logc.jar
 /.project/
 /.settings/
 /compile_commands.json
diff --git a/make/PreInit.gmk b/make/PreInit.gmk
index 3df44308dd9..8152587781c 100644
--- a/make/PreInit.gmk
+++ b/make/PreInit.gmk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2026, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -66,7 +66,8 @@ CALLED_SPEC_TARGETS := $(filter-out $(ALL_GLOBAL_TARGETS), $(CALLED_TARGETS))
 ifeq ($(CALLED_SPEC_TARGETS), )
   SKIP_SPEC := true
 endif
-ifeq ($(findstring p, $(MAKEFLAGS))$(findstring q, $(MAKEFLAGS)), pq)
+MFLAGS_SINGLE := $(filter-out --%, $(MFLAGS))
+ifeq ($(findstring p, $(MFLAGS_SINGLE))$(findstring q, $(MFLAGS_SINGLE)), pq)
   SKIP_SPEC := true
 endif
 
diff --git a/make/autoconf/lib-bundled.m4 b/make/autoconf/lib-bundled.m4
index bc358928af0..7aa5fdf2589 100644
--- a/make/autoconf/lib-bundled.m4
+++ b/make/autoconf/lib-bundled.m4
@@ -267,7 +267,7 @@ AC_DEFUN_ONCE([LIB_SETUP_ZLIB],
   LIBZ_LIBS=""
   if test "x$USE_EXTERNAL_LIBZ" = "xfalse"; then
     LIBZ_CFLAGS="$LIBZ_CFLAGS -I$TOPDIR/src/java.base/share/native/libzip/zlib"
-    if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    if test "x$OPENJDK_TARGET_OS" = xmacosx -o "x$OPENJDK_TARGET_OS" = xaix -o "x$OPENJDK_TARGET_OS" = xlinux; then
         LIBZ_CFLAGS="$LIBZ_CFLAGS -DHAVE_UNISTD_H=1 -DHAVE_STDARG_H=1"
     fi
   else
diff --git a/src/hotspot/cpu/aarch64/aarch64.ad b/src/hotspot/cpu/aarch64/aarch64.ad
index a9ca91d9309..9734c6845ea 100644
--- a/src/hotspot/cpu/aarch64/aarch64.ad
+++ b/src/hotspot/cpu/aarch64/aarch64.ad
@@ -3403,11 +3403,13 @@ encode %{
       } else if (rtype == relocInfo::metadata_type) {
         __ mov_metadata(dst_reg, (Metadata*)con);
       } else {
-        assert(rtype == relocInfo::none, "unexpected reloc type");
+        assert(rtype == relocInfo::none || rtype == relocInfo::external_word_type, "unexpected reloc type");
+        // load fake address constants using a normal move
         if (! __ is_valid_AArch64_address(con) ||
             con < (address)(uintptr_t)os::vm_page_size()) {
           __ mov(dst_reg, con);
         } else {
+          // no reloc so just use adrp and add
           uint64_t offset;
           __ adrp(dst_reg, con, offset);
           __ add(dst_reg, dst_reg, offset);
@@ -4535,6 +4537,18 @@ operand immP_1()
   interface(CONST_INTER);
 %}
 
+// AOT Runtime Constants Address
+operand immAOTRuntimeConstantsAddress()
+%{
+  // Check if the address is in the range of AOT Runtime Constants
+  predicate(AOTRuntimeConstants::contains((address)(n->get_ptr())));
+  match(ConP);
+
+  op_cost(0);
+  format %{ %}
+  interface(CONST_INTER);
+%}
+
 // Float and Double operands
 // Double Immediate
 operand immD()
@@ -6898,6 +6912,20 @@ instruct loadConP1(iRegPNoSp dst, immP_1 con)
   ins_pipe(ialu_imm);
 %}
 
+instruct loadAOTRCAddress(iRegPNoSp dst, immAOTRuntimeConstantsAddress con)
+%{
+  match(Set dst con);
+
+  ins_cost(INSN_COST);
+  format %{ "adr  $dst, $con\t# AOT Runtime Constants Address" %}
+
+  ins_encode %{
+    __ load_aotrc_address($dst$$Register, (address)$con$$constant);
+  %}
+
+  ins_pipe(ialu_imm);
+%}
+
 // Load Narrow Pointer Constant
 
 instruct loadConN(iRegNNoSp dst, immN con)
diff --git a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
index c0621cbd5c2..30048a2079d 100644
--- a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
@@ -33,6 +33,7 @@
 #include "c1/c1_ValueStack.hpp"
 #include "ci/ciArrayKlass.hpp"
 #include "ci/ciInstance.hpp"
+#include "code/aotCodeCache.hpp"
 #include "code/compiledIC.hpp"
 #include "gc/shared/collectedHeap.hpp"
 #include "gc/shared/gc_globals.hpp"
@@ -532,6 +533,15 @@ void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_cod
 
     case T_LONG: {
       assert(patch_code == lir_patch_none, "no patching handled here");
+#if INCLUDE_CDS
+      if (AOTCodeCache::is_on_for_dump()) {
+        address b = c->as_pointer();
+        if (AOTRuntimeConstants::contains(b)) {
+          __ load_aotrc_address(dest->as_register_lo(), b);
+          break;
+        }
+      }
+#endif
       __ mov(dest->as_register_lo(), (intptr_t)c->as_jlong());
       break;
     }
diff --git a/src/hotspot/cpu/aarch64/gc/g1/g1BarrierSetAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/gc/g1/g1BarrierSetAssembler_aarch64.cpp
index d7884c27a2c..68291720208 100644
--- a/src/hotspot/cpu/aarch64/gc/g1/g1BarrierSetAssembler_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/gc/g1/g1BarrierSetAssembler_aarch64.cpp
@@ -23,6 +23,7 @@
  */
 
 #include "asm/macroAssembler.inline.hpp"
+#include "code/aotCodeCache.hpp"
 #include "gc/g1/g1BarrierSet.hpp"
 #include "gc/g1/g1BarrierSetAssembler.hpp"
 #include "gc/g1/g1BarrierSetRuntime.hpp"
@@ -243,9 +244,25 @@ static void generate_post_barrier(MacroAssembler* masm,
   assert_different_registers(store_addr, new_val, thread, tmp1, tmp2, noreg, rscratch1);
 
   // Does store cross heap regions?
-  __ eor(tmp1, store_addr, new_val);                     // tmp1 := store address ^ new value
-  __ lsr(tmp1, tmp1, G1HeapRegion::LogOfHRGrainBytes);   // tmp1 := ((store address ^ new value) >> LogOfHRGrainBytes)
-  __ cbz(tmp1, done);
+ #if INCLUDE_CDS
+  // AOT code needs to load the barrier grain shift from the aot
+  // runtime constants area in the code cache otherwise we can compile
+  // it as an immediate operand
+  if (AOTCodeCache::is_on_for_dump()) {
+    address grain_shift_address = (address)AOTRuntimeConstants::grain_shift_address();
+    __ eor(tmp1, store_addr, new_val);
+    __ lea(tmp2, ExternalAddress(grain_shift_address));
+    __ ldrb(tmp2, tmp2);
+    __ lsrv(tmp1, tmp1, tmp2);
+    __ cbz(tmp1, done);
+  } else
+#endif
+  {
+    __ eor(tmp1, store_addr, new_val);                     // tmp1 := store address ^ new value
+    __ lsr(tmp1, tmp1, G1HeapRegion::LogOfHRGrainBytes);   // tmp1 := ((store address ^ new value) >> LogOfHRGrainBytes)
+    __ cbz(tmp1, done);
+  }
+
   // Crosses regions, storing null?
   if (new_val_may_be_null) {
     __ cbz(new_val, done);
diff --git a/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
index 35e90d296c9..3e3e95be07e 100644
--- a/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
@@ -5754,6 +5754,14 @@ void MacroAssembler::adrp(Register reg1, const Address &dest, uint64_t &byte_off
 }
 
 void MacroAssembler::load_byte_map_base(Register reg) {
+#if INCLUDE_CDS
+  if (AOTCodeCache::is_on_for_dump()) {
+    address byte_map_base_adr = AOTRuntimeConstants::card_table_base_address();
+    lea(reg, ExternalAddress(byte_map_base_adr));
+    ldr(reg, Address(reg));
+    return;
+  }
+#endif
   CardTableBarrierSet* ctbs = CardTableBarrierSet::barrier_set();
 
   // Strictly speaking the card table base isn't an address at all, and it might
@@ -5761,6 +5769,20 @@ void MacroAssembler::load_byte_map_base(Register reg) {
   mov(reg, (uint64_t)ctbs->card_table_base_const());
 }
 
+void MacroAssembler::load_aotrc_address(Register reg, address a) {
+#if INCLUDE_CDS
+  assert(AOTRuntimeConstants::contains(a), "address out of range for data area");
+  if (AOTCodeCache::is_on_for_dump()) {
+    // all aotrc field addresses should be registered in the AOTCodeCache address table
+    lea(reg, ExternalAddress(a));
+  } else {
+    mov(reg, (uint64_t)a);
+  }
+#else
+  ShouldNotReachHere();
+#endif
+}
+
 void MacroAssembler::build_frame(int framesize) {
   assert(framesize >= 2 * wordSize, "framesize must include space for FP/LR");
   assert(framesize % (2*wordSize) == 0, "must preserve 2*wordSize alignment");
diff --git a/src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp b/src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp
index 7b5af532ca1..fa32f3055b9 100644
--- a/src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp
@@ -1476,6 +1476,9 @@ public:
   // Load the base of the cardtable byte map into reg.
   void load_byte_map_base(Register reg);
 
+  // Load a constant address in the AOT Runtime Constants area
+  void load_aotrc_address(Register reg, address a);
+
   // Prolog generator routines to support switch between x86 code and
   // generated ARM code
 
diff --git a/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp b/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
index 37ee9451405..d9be0fdcc8d 100644
--- a/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
+++ b/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
@@ -32,6 +32,7 @@
 #include "c1/c1_ValueStack.hpp"
 #include "ci/ciArrayKlass.hpp"
 #include "ci/ciInstance.hpp"
+#include "code/aotCodeCache.hpp"
 #include "compiler/oopMap.hpp"
 #include "gc/shared/collectedHeap.hpp"
 #include "gc/shared/gc_globals.hpp"
@@ -535,6 +536,15 @@ void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_cod
 
     case T_LONG: {
       assert(patch_code == lir_patch_none, "no patching handled here");
+#if INCLUDE_CDS
+      if (AOTCodeCache::is_on_for_dump()) {
+        address b = c->as_pointer();
+        if (AOTRuntimeConstants::contains(b)) {
+          __ load_aotrc_address(dest->as_register_lo(), b);
+          break;
+        }
+      }
+#endif
       __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
       break;
     }
diff --git a/src/hotspot/cpu/x86/gc/g1/g1BarrierSetAssembler_x86.cpp b/src/hotspot/cpu/x86/gc/g1/g1BarrierSetAssembler_x86.cpp
index 34de9403ccf..b20d7b5cd07 100644
--- a/src/hotspot/cpu/x86/gc/g1/g1BarrierSetAssembler_x86.cpp
+++ b/src/hotspot/cpu/x86/gc/g1/g1BarrierSetAssembler_x86.cpp
@@ -23,6 +23,7 @@
  */
 
 #include "asm/macroAssembler.inline.hpp"
+#include "code/aotCodeCache.hpp"
 #include "gc/g1/g1BarrierSet.hpp"
 #include "gc/g1/g1BarrierSetAssembler.hpp"
 #include "gc/g1/g1BarrierSetRuntime.hpp"
@@ -268,6 +269,16 @@ void G1BarrierSetAssembler::g1_write_barrier_pre(MacroAssembler* masm,
   __ bind(done);
 }
 
+#if INCLUDE_CDS
+// return a register that differs from reg1, reg2, reg3 and reg4
+
+static Register pick_different_reg(Register reg1, Register reg2 = noreg, Register reg3= noreg, Register reg4 = noreg) {
+  RegSet available = (RegSet::of(rscratch1, rscratch2, rax, rbx) + rdx -
+                      RegSet::of(reg1, reg2, reg3, reg4));
+  return *(available.begin());
+}
+#endif // INCLUDE_CDS
+
 static void generate_post_barrier(MacroAssembler* masm,
                                   const Register store_addr,
                                   const Register new_val,
@@ -280,10 +291,32 @@ static void generate_post_barrier(MacroAssembler* masm,
 
   Label L_done;
   // Does store cross heap regions?
-  __ movptr(tmp1, store_addr);                                    // tmp1 := store address
-  __ xorptr(tmp1, new_val);                                       // tmp1 := store address ^ new value
-  __ shrptr(tmp1, G1HeapRegion::LogOfHRGrainBytes);               // ((store address ^ new value) >> LogOfHRGrainBytes) == 0?
-  __ jccb(Assembler::equal, L_done);
+#if INCLUDE_CDS
+  // AOT code needs to load the barrier grain shift from the aot
+  // runtime constants area in the code cache otherwise we can compile
+  // it as an immediate operand
+
+  if (AOTCodeCache::is_on_for_dump()) {
+    address grain_shift_addr = AOTRuntimeConstants::grain_shift_address();
+    Register save = pick_different_reg(rcx, tmp1, new_val, store_addr);
+    __ push(save);
+    __ movptr(save, store_addr);
+    __ xorptr(save, new_val);
+    __ push(rcx);
+    __ lea(rcx, ExternalAddress(grain_shift_addr));
+    __ movl(rcx, Address(rcx, 0));
+    __ shrptr(save);
+    __ pop(rcx);
+    __ pop(save);
+    __ jcc(Assembler::equal, L_done);
+  } else
+#endif // INCLUDE_CDS
+  {
+    __ movptr(tmp1, store_addr);                                    // tmp1 := store address
+    __ xorptr(tmp1, new_val);                                       // tmp1 := store address ^ new value
+    __ shrptr(tmp1, G1HeapRegion::LogOfHRGrainBytes);               // ((store address ^ new value) >> LogOfHRGrainBytes) == 0?
+    __ jccb(Assembler::equal, L_done);
+  }
 
   // Crosses regions, storing null?
   if (new_val_may_be_null) {
diff --git a/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.cpp b/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.cpp
index 65e6b4e01fc..0ea769dd488 100644
--- a/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.cpp
+++ b/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.cpp
@@ -23,6 +23,7 @@
  */
 
 #include "asm/macroAssembler.inline.hpp"
+#include "code/aotCodeCache.hpp"
 #include "gc/shared/barrierSet.hpp"
 #include "gc/shared/cardTable.hpp"
 #include "gc/shared/cardTableBarrierSet.hpp"
@@ -111,7 +112,15 @@ void CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier(MacroAssembl
   __ shrptr(end, CardTable::card_shift());
   __ subptr(end, addr); // end --> cards count
 
-  __ mov64(tmp, (intptr_t)ctbs->card_table_base_const());
+#if INCLUDE_CDS
+  if (AOTCodeCache::is_on_for_dump()) {
+    __ lea(tmp, ExternalAddress(AOTRuntimeConstants::card_table_base_address()));
+    __ movq(tmp, Address(tmp, 0));
+  } else
+#endif
+  {
+    __ mov64(tmp, (intptr_t)ctbs->card_table_base_const());
+  }
   __ addptr(addr, tmp);
 __ BIND(L_loop);
   __ movb(Address(addr, count, Address::times_1), 0);
@@ -121,7 +130,7 @@ __ BIND(L_loop);
 __ BIND(L_done);
 }
 
-void CardTableBarrierSetAssembler::store_check(MacroAssembler* masm, Register obj, Address dst) {
+void CardTableBarrierSetAssembler::store_check(MacroAssembler* masm, Register obj, Address dst, Register rscratch) {
   // Does a store check for the oop in register obj. The content of
   // register obj is destroyed afterwards.
   CardTableBarrierSet* ctbs = CardTableBarrierSet::barrier_set();
@@ -136,6 +145,13 @@ void CardTableBarrierSetAssembler::store_check(MacroAssembler* masm, Register ob
   // never need to be relocated. On 64bit however the value may be too
   // large for a 32bit displacement.
   intptr_t byte_map_base = (intptr_t)ctbs->card_table_base_const();
+#if INCLUDE_CDS
+  if (AOTCodeCache::is_on_for_dump()) {
+    __ lea(rscratch, ExternalAddress(AOTRuntimeConstants::card_table_base_address()));
+    __ movq(rscratch, Address(rscratch, 0));
+    card_addr = Address(rscratch, obj, Address::times_1, 0);
+  } else
+#endif
   if (__ is_simm32(byte_map_base)) {
     card_addr = Address(noreg, obj, Address::times_1, byte_map_base);
   } else {
@@ -174,10 +190,10 @@ void CardTableBarrierSetAssembler::oop_store_at(MacroAssembler* masm, DecoratorS
   if (needs_post_barrier) {
     // flatten object address if needed
     if (!precise || (dst.index() == noreg && dst.disp() == 0)) {
-      store_check(masm, dst.base(), dst);
+      store_check(masm, dst.base(), dst, tmp2);
     } else {
       __ lea(tmp1, dst);
-      store_check(masm, tmp1, dst);
+      store_check(masm, tmp1, dst, tmp2);
     }
   }
 }
diff --git a/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.hpp b/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.hpp
index 0a36571c757..201c11062f2 100644
--- a/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.hpp
+++ b/src/hotspot/cpu/x86/gc/shared/cardTableBarrierSetAssembler_x86.hpp
@@ -33,7 +33,7 @@ protected:
   virtual void gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators,
                                                Register addr, Register count) {}
 
-  void store_check(MacroAssembler* masm, Register obj, Address dst);
+  void store_check(MacroAssembler* masm, Register obj, Address dst, Register rscratch);
 
   virtual void gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators, Register addr, Register count, Register tmp);
 
diff --git a/src/hotspot/cpu/x86/macroAssembler_x86.cpp b/src/hotspot/cpu/x86/macroAssembler_x86.cpp
index 83169df3456..b54f6adc263 100644
--- a/src/hotspot/cpu/x86/macroAssembler_x86.cpp
+++ b/src/hotspot/cpu/x86/macroAssembler_x86.cpp
@@ -10034,6 +10034,20 @@ void MacroAssembler::restore_legacy_gprs() {
   addq(rsp, 16 * wordSize);
 }
 
+void MacroAssembler::load_aotrc_address(Register reg, address a) {
+#if INCLUDE_CDS
+  assert(AOTRuntimeConstants::contains(a), "address out of range for data area");
+  if (AOTCodeCache::is_on_for_dump()) {
+    // all aotrc field addresses should be registered in the AOTCodeCache address table
+    lea(reg, ExternalAddress(a));
+  } else {
+    mov64(reg, (uint64_t)a);
+  }
+#else
+  ShouldNotReachHere();
+#endif
+}
+
 void MacroAssembler::setcc(Assembler::Condition comparison, Register dst) {
   if (VM_Version::supports_apx_f()) {
     esetzucc(comparison, dst);
diff --git a/src/hotspot/cpu/x86/macroAssembler_x86.hpp b/src/hotspot/cpu/x86/macroAssembler_x86.hpp
index eb23199ca63..5c049f710e2 100644
--- a/src/hotspot/cpu/x86/macroAssembler_x86.hpp
+++ b/src/hotspot/cpu/x86/macroAssembler_x86.hpp
@@ -2070,6 +2070,7 @@ public:
 
   void save_legacy_gprs();
   void restore_legacy_gprs();
+  void load_aotrc_address(Register reg, address a);
   void setcc(Assembler::Condition comparison, Register dst);
 };
 
diff --git a/src/hotspot/cpu/x86/x86.ad b/src/hotspot/cpu/x86/x86.ad
index aed54fe93d4..0ffa4c2031c 100644
--- a/src/hotspot/cpu/x86/x86.ad
+++ b/src/hotspot/cpu/x86/x86.ad
@@ -5187,6 +5187,18 @@ operand immL_65535()
   interface(CONST_INTER);
 %}
 
+// AOT Runtime Constants Address
+operand immAOTRuntimeConstantsAddress()
+%{
+  // Check if the address is in the range of AOT Runtime Constants
+  predicate(AOTRuntimeConstants::contains((address)(n->get_ptr())));
+  match(ConP);
+
+  op_cost(0);
+  format %{ %}
+  interface(CONST_INTER);
+%}
+
 operand kReg()
 %{
   constraint(ALLOC_IN_RC(vectmask_reg));
@@ -7332,6 +7344,19 @@ instruct loadD(regD dst, memory mem)
   ins_pipe(pipe_slow); // XXX
 %}
 
+instruct loadAOTRCAddress(rRegP dst, immAOTRuntimeConstantsAddress con)
+%{
+  match(Set dst con);
+
+  format %{ "leaq  $dst, $con\t# AOT Runtime Constants Address" %}
+
+  ins_encode %{
+    __ load_aotrc_address($dst$$Register, (address)$con$$constant);
+  %}
+
+  ins_pipe(ialu_reg_fat);
+%}
+
 // max = java.lang.Math.max(float a, float b)
 instruct maxF_reg_avx10_2(regF dst, regF a, regF b) %{
   predicate(VM_Version::supports_avx10_2());
diff --git a/src/hotspot/os_cpu/windows_aarch64/vm_version_windows_aarch64.cpp b/src/hotspot/os_cpu/windows_aarch64/vm_version_windows_aarch64.cpp
index a20feadcba4..93beb549366 100644
--- a/src/hotspot/os_cpu/windows_aarch64/vm_version_windows_aarch64.cpp
+++ b/src/hotspot/os_cpu/windows_aarch64/vm_version_windows_aarch64.cpp
@@ -27,22 +27,30 @@
 #include "runtime/vm_version.hpp"
 
 int VM_Version::get_current_sve_vector_length() {
-  assert(_features & CPU_SVE, "should not call this");
+  assert(VM_Version::supports_sve(), "should not call this");
   ShouldNotReachHere();
   return 0;
 }
 
 int VM_Version::set_and_get_current_sve_vector_length(int length) {
-  assert(_features & CPU_SVE, "should not call this");
+  assert(VM_Version::supports_sve(), "should not call this");
   ShouldNotReachHere();
   return 0;
 }
 
 void VM_Version::get_os_cpu_info() {
 
-  if (IsProcessorFeaturePresent(PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE))   _features |= CPU_CRC32;
-  if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE))  _features |= CPU_AES | CPU_SHA1 | CPU_SHA2;
-  if (IsProcessorFeaturePresent(PF_ARM_VFP_32_REGISTERS_AVAILABLE))        _features |= CPU_ASIMD;
+  if (IsProcessorFeaturePresent(PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE)) {
+    set_feature(CPU_CRC32);
+  }
+  if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE)) {
+    set_feature(CPU_AES);
+    set_feature(CPU_SHA1);
+    set_feature(CPU_SHA2);
+  }
+  if (IsProcessorFeaturePresent(PF_ARM_VFP_32_REGISTERS_AVAILABLE)) {
+    set_feature(CPU_ASIMD);
+  }
   // No check for CPU_PMULL, CPU_SVE, CPU_SVE2
 
   __int64 dczid_el0 = _ReadStatusReg(0x5807 /* ARM64_DCZID_EL0 */);
diff --git a/src/hotspot/share/adlc/main.cpp b/src/hotspot/share/adlc/main.cpp
index 4e8a96617e8..8e6ea5bbec9 100644
--- a/src/hotspot/share/adlc/main.cpp
+++ b/src/hotspot/share/adlc/main.cpp
@@ -213,6 +213,7 @@ int main(int argc, char *argv[])
   AD.addInclude(AD._CPP_file, "adfiles", get_basename(AD._VM_file._name));
   AD.addInclude(AD._CPP_file, "adfiles", get_basename(AD._HPP_file._name));
   AD.addInclude(AD._CPP_file, "memory/allocation.inline.hpp");
+  AD.addInclude(AD._CPP_file, "code/aotCodeCache.hpp");
   AD.addInclude(AD._CPP_file, "code/codeCache.hpp");
   AD.addInclude(AD._CPP_file, "code/compiledIC.hpp");
   AD.addInclude(AD._CPP_file, "code/nativeInst.hpp");
@@ -257,6 +258,7 @@ int main(int argc, char *argv[])
   AD.addInclude(AD._CPP_PEEPHOLE_file, "adfiles", get_basename(AD._HPP_file._name));
   AD.addInclude(AD._CPP_PIPELINE_file, "adfiles", get_basename(AD._HPP_file._name));
   AD.addInclude(AD._DFA_file, "adfiles", get_basename(AD._HPP_file._name));
+  AD.addInclude(AD._DFA_file, "code/aotCodeCache.hpp");
   AD.addInclude(AD._DFA_file, "oops/compressedOops.hpp");
   AD.addInclude(AD._DFA_file, "opto/cfgnode.hpp");  // Use PROB_MAX in predicate.
   AD.addInclude(AD._DFA_file, "opto/intrinsicnode.hpp");
diff --git a/src/hotspot/share/classfile/vmIntrinsics.hpp b/src/hotspot/share/classfile/vmIntrinsics.hpp
index 29cb5d737d8..67817682ced 100644
--- a/src/hotspot/share/classfile/vmIntrinsics.hpp
+++ b/src/hotspot/share/classfile/vmIntrinsics.hpp
@@ -1029,7 +1029,7 @@ class methodHandle;
   do_intrinsic(_VectorUnaryLibOp, jdk_internal_vm_vector_VectorSupport, vector_unary_lib_op_name, vector_unary_lib_op_sig, F_S)                \
    do_signature(vector_unary_lib_op_sig,"(J"                                                                                                   \
                                          "Ljava/lang/Class;"                                                                                   \
-                                         "Ljava/lang/Class;"                                                                                   \
+                                         "I"                                                                                                   \
                                          "I"                                                                                                   \
                                          "Ljava/lang/String;"                                                                                  \
                                          "Ljdk/internal/vm/vector/VectorSupport$Vector;"                                                       \
@@ -1040,7 +1040,7 @@ class methodHandle;
   do_intrinsic(_VectorBinaryLibOp, jdk_internal_vm_vector_VectorSupport, vector_binary_lib_op_name, vector_binary_lib_op_sig, F_S)             \
    do_signature(vector_binary_lib_op_sig,"(J"                                                                                                  \
                                           "Ljava/lang/Class;"                                                                                  \
-                                          "Ljava/lang/Class;"                                                                                  \
+                                          "I"                                                                                                  \
                                           "I"                                                                                                  \
                                           "Ljava/lang/String;"                                                                                 \
                                           "Ljdk/internal/vm/vector/VectorSupport$VectorPayload;"                                               \
diff --git a/src/hotspot/share/code/aotCodeCache.cpp b/src/hotspot/share/code/aotCodeCache.cpp
index 32a53691f3f..e5f68afc51d 100644
--- a/src/hotspot/share/code/aotCodeCache.cpp
+++ b/src/hotspot/share/code/aotCodeCache.cpp
@@ -29,9 +29,11 @@
 #include "cds/cds_globals.hpp"
 #include "cds/cdsConfig.hpp"
 #include "cds/heapShared.hpp"
+#include "ci/ciUtilities.hpp"
 #include "classfile/javaAssertions.hpp"
 #include "code/aotCodeCache.hpp"
 #include "code/codeCache.hpp"
+#include "gc/shared/cardTableBarrierSet.hpp"
 #include "gc/shared/gcConfig.hpp"
 #include "logging/logStream.hpp"
 #include "memory/memoryReserver.hpp"
@@ -53,6 +55,7 @@
 #endif
 #if INCLUDE_G1GC
 #include "gc/g1/g1BarrierSetRuntime.hpp"
+#include "gc/g1/g1HeapRegion.hpp"
 #endif
 #if INCLUDE_SHENANDOAHGC
 #include "gc/shenandoah/shenandoahRuntime.hpp"
@@ -258,6 +261,9 @@ void AOTCodeCache::init2() {
     return;
   }
 
+  // initialize aot runtime constants as appropriate to this runtime
+  AOTRuntimeConstants::initialize_from_runtime();
+
   // initialize the table of external routines so we can save
   // generated code blobs that reference them
   AOTCodeAddressTable* table = opened_cache->_table;
@@ -1447,6 +1453,12 @@ void AOTCodeAddressTable::init_extrs() {
 #endif
 #endif // ZERO
 
+  // addresses of fields in AOT runtime constants area
+  address* p = AOTRuntimeConstants::field_addresses_list();
+  while (*p != nullptr) {
+    SET_ADDRESS(_extrs, *p++);
+  }
+
   _extrs_complete = true;
   log_debug(aot, codecache, init)("External addresses recorded");
 }
@@ -1729,6 +1741,11 @@ int AOTCodeAddressTable::id_for_address(address addr, RelocIterator reloc, CodeB
   if (addr == (address)-1) { // Static call stub has jump to itself
     return id;
   }
+  // Check card_table_base address first since it can point to any address
+  BarrierSet* bs = BarrierSet::barrier_set();
+  bool is_const_card_table_base = !UseG1GC && !UseShenandoahGC && bs->is_a(BarrierSet::CardTableBarrierSet);
+  guarantee(!is_const_card_table_base || addr != ci_card_table_address_const(), "sanity");
+
   // Seach for C string
   id = id_for_C_string(addr);
   if (id >= 0) {
@@ -1798,6 +1815,44 @@ int AOTCodeAddressTable::id_for_address(address addr, RelocIterator reloc, CodeB
   return id;
 }
 
+AOTRuntimeConstants AOTRuntimeConstants::_aot_runtime_constants;
+
+void AOTRuntimeConstants::initialize_from_runtime() {
+  BarrierSet* bs = BarrierSet::barrier_set();
+  address card_table_base = nullptr;
+  uint grain_shift = 0;
+#if INCLUDE_G1GC
+  if (bs->is_a(BarrierSet::G1BarrierSet)) {
+    grain_shift = G1HeapRegion::LogOfHRGrainBytes;
+  } else
+#endif
+#if INCLUDE_SHENANDOAHGC
+  if (bs->is_a(BarrierSet::ShenandoahBarrierSet)) {
+    grain_shift = 0;
+  } else
+#endif
+  if (bs->is_a(BarrierSet::CardTableBarrierSet)) {
+    CardTable::CardValue* base = ci_card_table_address_const();
+    assert(base != nullptr, "unexpected byte_map_base");
+    card_table_base = base;
+    CardTableBarrierSet* ctbs = barrier_set_cast<CardTableBarrierSet>(bs);
+    grain_shift = ctbs->grain_shift();
+  }
+  _aot_runtime_constants._card_table_base = card_table_base;
+  _aot_runtime_constants._grain_shift = grain_shift;
+}
+
+address AOTRuntimeConstants::_field_addresses_list[] = {
+  ((address)&_aot_runtime_constants._card_table_base),
+  ((address)&_aot_runtime_constants._grain_shift),
+  nullptr
+};
+
+address AOTRuntimeConstants::card_table_base_address() {
+  assert(UseSerialGC || UseParallelGC, "Only these GCs have constant card table base");
+  return (address)&_aot_runtime_constants._card_table_base;
+}
+
 // This is called after initialize() but before init2()
 // and _cache is not set yet.
 void AOTCodeCache::print_on(outputStream* st) {
diff --git a/src/hotspot/share/code/aotCodeCache.hpp b/src/hotspot/share/code/aotCodeCache.hpp
index 45b4a15510d..85f8b47920f 100644
--- a/src/hotspot/share/code/aotCodeCache.hpp
+++ b/src/hotspot/share/code/aotCodeCache.hpp
@@ -25,6 +25,7 @@
 #ifndef SHARE_CODE_AOTCODECACHE_HPP
 #define SHARE_CODE_AOTCODECACHE_HPP
 
+#include "gc/shared/gc_globals.hpp"
 #include "runtime/stubInfo.hpp"
 
 /*
@@ -422,4 +423,36 @@ public:
 #endif // PRODUCT
 };
 
+// code cache internal runtime constants area used by AOT code
+class AOTRuntimeConstants {
+ friend class AOTCodeCache;
+ private:
+  address _card_table_base;
+  uint    _grain_shift;
+  static address _field_addresses_list[];
+  static AOTRuntimeConstants _aot_runtime_constants;
+  // private constructor for unique singleton
+  AOTRuntimeConstants() { }
+  // private for use by friend class AOTCodeCache
+  static void initialize_from_runtime();
+ public:
+#if INCLUDE_CDS
+  static bool contains(address adr) {
+    address base = (address)&_aot_runtime_constants;
+    address hi = base + sizeof(AOTRuntimeConstants);
+    return (base <= adr && adr < hi);
+  }
+  static address card_table_base_address();
+  static address grain_shift_address() { return (address)&_aot_runtime_constants._grain_shift; }
+  static address* field_addresses_list() {
+    return _field_addresses_list;
+  }
+#else
+  static bool contains(address adr)        { return false; }
+  static address card_table_base_address() { return nullptr; }
+  static address grain_shift_address()     { return nullptr; }
+  static address* field_addresses_list()   { return nullptr; }
+#endif
+};
+
 #endif // SHARE_CODE_AOTCODECACHE_HPP
diff --git a/src/hotspot/share/gc/g1/g1BarrierSet.hpp b/src/hotspot/share/gc/g1/g1BarrierSet.hpp
index 406096acf10..c5c7058471c 100644
--- a/src/hotspot/share/gc/g1/g1BarrierSet.hpp
+++ b/src/hotspot/share/gc/g1/g1BarrierSet.hpp
@@ -25,6 +25,7 @@
 #ifndef SHARE_GC_G1_G1BARRIERSET_HPP
 #define SHARE_GC_G1_G1BARRIERSET_HPP
 
+#include "gc/g1/g1HeapRegion.hpp"
 #include "gc/g1/g1SATBMarkQueueSet.hpp"
 #include "gc/shared/bufferNode.hpp"
 #include "gc/shared/cardTable.hpp"
@@ -116,6 +117,8 @@ class G1BarrierSet: public CardTableBarrierSet {
 
   virtual void print_on(outputStream* st) const;
 
+  virtual uint grain_shift() { return G1HeapRegion::LogOfHRGrainBytes; }
+
   // Callbacks for runtime accesses.
   template <DecoratorSet decorators, typename BarrierSetT = G1BarrierSet>
   class AccessBarrier: public CardTableBarrierSet::AccessBarrier<decorators, BarrierSetT> {
diff --git a/src/hotspot/share/gc/shared/c1/cardTableBarrierSetC1.cpp b/src/hotspot/share/gc/shared/c1/cardTableBarrierSetC1.cpp
index 914358760aa..86b74aa5736 100644
--- a/src/hotspot/share/gc/shared/c1/cardTableBarrierSetC1.cpp
+++ b/src/hotspot/share/gc/shared/c1/cardTableBarrierSetC1.cpp
@@ -22,6 +22,7 @@
  *
  */
 
+#include "code/aotCodeCache.hpp"
 #include "gc/shared/c1/cardTableBarrierSetC1.hpp"
 #include "gc/shared/cardTable.hpp"
 #include "gc/shared/cardTableBarrierSet.hpp"
@@ -123,6 +124,7 @@ void CardTableBarrierSetC1::post_barrier(LIRAccess& access, LIR_Opr addr, LIR_Op
   assert(addr->is_register(), "must be a register at this point");
 
 #ifdef CARDTABLEBARRIERSET_POST_BARRIER_HELPER
+  assert(!AOTCodeCache::is_on(), "this path is not implemented");
   gen->CardTableBarrierSet_post_barrier_helper(addr, card_table_base);
 #else
   LIR_Opr tmp = gen->new_pointer_register();
@@ -135,6 +137,17 @@ void CardTableBarrierSetC1::post_barrier(LIRAccess& access, LIR_Opr addr, LIR_Op
   }
 
   LIR_Address* card_addr;
+#if INCLUDE_CDS
+  if (AOTCodeCache::is_on_for_dump()) {
+    // load the card table address from the AOT Runtime Constants area
+    LIR_Opr byte_map_base_adr = LIR_OprFact::intptrConst(AOTRuntimeConstants::card_table_base_address());
+    LIR_Opr byte_map_base_reg = gen->new_pointer_register();
+    __ move(byte_map_base_adr, byte_map_base_reg);
+    LIR_Address* byte_map_base_indirect = new LIR_Address(byte_map_base_reg, 0, T_LONG);
+    __ move(byte_map_base_indirect, byte_map_base_reg);
+    card_addr = new LIR_Address(tmp, byte_map_base_reg, T_BYTE);
+  } else
+#endif
   if (gen->can_inline_as_constant(card_table_base)) {
     card_addr = new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE);
   } else {
diff --git a/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.cpp b/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.cpp
index 42af77ebdf4..f7445ff254f 100644
--- a/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.cpp
+++ b/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.cpp
@@ -23,6 +23,7 @@
  */
 
 #include "ci/ciUtilities.hpp"
+#include "code/aotCodeCache.hpp"
 #include "gc/shared/c2/cardTableBarrierSetC2.hpp"
 #include "gc/shared/cardTable.hpp"
 #include "gc/shared/cardTableBarrierSet.hpp"
@@ -114,13 +115,20 @@ Node* CardTableBarrierSetC2::atomic_xchg_at_resolved(C2AtomicParseAccess& access
   return result;
 }
 
-Node* CardTableBarrierSetC2::byte_map_base_node(GraphKit* kit) const {
+Node* CardTableBarrierSetC2::byte_map_base_node(IdealKit* kit) const {
   // Get base of card map
+#if INCLUDE_CDS
+  if (AOTCodeCache::is_on_for_dump()) {
+    // load the card table address from the AOT Runtime Constants area
+    Node* byte_map_base_adr = kit->makecon(TypeRawPtr::make(AOTRuntimeConstants::card_table_base_address()));
+    return kit->load_aot_const(byte_map_base_adr, TypeRawPtr::NOTNULL);
+  }
+#endif
   CardTable::CardValue* card_table_base = ci_card_table_address_const();
    if (card_table_base != nullptr) {
      return kit->makecon(TypeRawPtr::make((address)card_table_base));
    } else {
-     return kit->null();
+     return kit->makecon(Type::get_zero_type(T_ADDRESS));
    }
 }
 
@@ -168,7 +176,7 @@ void CardTableBarrierSetC2::post_barrier(GraphKit* kit,
   Node* card_offset = __ URShiftX(cast, __ ConI(CardTable::card_shift()));
 
   // Combine card table base and card offset
-  Node* card_adr = __ AddP(__ top(), byte_map_base_node(kit), card_offset);
+  Node* card_adr = __ AddP(__ top(), byte_map_base_node(&ideal), card_offset);
 
   // Get the alias_index for raw card-mark memory
   int adr_type = Compile::AliasIdxRaw;
diff --git a/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.hpp b/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.hpp
index 84876808f0d..8f5bae8c6dd 100644
--- a/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.hpp
+++ b/src/hotspot/share/gc/shared/c2/cardTableBarrierSetC2.hpp
@@ -43,7 +43,7 @@ protected:
                                                 Node* new_val, const Type* value_type) const;
   virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, Node* new_val, const Type* value_type) const;
 
-  Node* byte_map_base_node(GraphKit* kit) const;
+  Node* byte_map_base_node(IdealKit* kit) const;
 
 public:
   virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
diff --git a/src/hotspot/share/gc/shared/cardTableBarrierSet.hpp b/src/hotspot/share/gc/shared/cardTableBarrierSet.hpp
index 3a9b46d9df8..5d355318b21 100644
--- a/src/hotspot/share/gc/shared/cardTableBarrierSet.hpp
+++ b/src/hotspot/share/gc/shared/cardTableBarrierSet.hpp
@@ -103,6 +103,10 @@ public:
 
   virtual void print_on(outputStream* st) const;
 
+  // The AOT code cache manager needs to know the region grain size
+  // shift for some barrier sets.
+  virtual uint grain_shift() { return 0; }
+
   template <DecoratorSet decorators, typename BarrierSetT = CardTableBarrierSet>
   class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> {
     typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw;
diff --git a/src/hotspot/share/gc/shared/plab.hpp b/src/hotspot/share/gc/shared/plab.hpp
index 5200f022633..d893a720e2a 100644
--- a/src/hotspot/share/gc/shared/plab.hpp
+++ b/src/hotspot/share/gc/shared/plab.hpp
@@ -147,14 +147,14 @@ public:
 
 // PLAB book-keeping.
 class PLABStats : public CHeapObj<mtGC> {
-protected:
-  const char* _description;   // Identifying string.
-
   Atomic<size_t> _allocated;          // Total allocated
   Atomic<size_t> _wasted;             // of which wasted (internal fragmentation)
   Atomic<size_t> _undo_wasted;        // of which wasted on undo (is not used for calculation of PLAB size)
   Atomic<size_t> _unused;             // Unused in last buffer
 
+protected:
+  const char* _description;   // Identifying string.
+
   virtual void reset() {
     _allocated.store_relaxed(0);
     _wasted.store_relaxed(0);
@@ -164,11 +164,11 @@ protected:
 
 public:
   PLABStats(const char* description) :
-    _description(description),
     _allocated(0),
     _wasted(0),
     _undo_wasted(0),
-    _unused(0)
+    _unused(0),
+    _description(description)
   { }
 
   virtual ~PLABStats() { }
diff --git a/src/hotspot/share/gc/shared/space.cpp b/src/hotspot/share/gc/shared/space.cpp
index 84ba21527fd..093fa4432e2 100644
--- a/src/hotspot/share/gc/shared/space.cpp
+++ b/src/hotspot/share/gc/shared/space.cpp
@@ -51,7 +51,7 @@ void ContiguousSpace::initialize(MemRegion mr,
   set_bottom(bottom);
   set_end(end);
   if (clear_space) {
-    clear(SpaceDecorator::DontMangle);
+    set_top(bottom);
   }
   if (ZapUnusedHeapArea) {
     mangle_unused_area();
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp b/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp
index c6e6108fda8..2be5722f7f9 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp
@@ -41,9 +41,9 @@ bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
     return true;
   }
 
-  ShenandoahReentrantLock* lock = ShenandoahNMethod::lock_for_nmethod(nm);
+  ShenandoahNMethodLock* lock = ShenandoahNMethod::lock_for_nmethod(nm);
   assert(lock != nullptr, "Must be");
-  ShenandoahReentrantLocker locker(lock);
+  ShenandoahNMethodLocker locker(lock);
 
   if (!is_armed(nm)) {
     // Some other thread managed to complete while we were
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp b/src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp
index 07d339eb32e..64e135e9a4e 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp
@@ -136,13 +136,13 @@ public:
     assert(!nm_data->is_unregistered(), "Should not see unregistered entry");
 
     if (nm->is_unloading()) {
-      ShenandoahReentrantLocker locker(nm_data->lock());
+      ShenandoahNMethodLocker locker(nm_data->lock());
       nm->unlink();
       return;
     }
 
     {
-      ShenandoahReentrantLocker locker(nm_data->lock());
+      ShenandoahNMethodLocker locker(nm_data->lock());
 
       // Heal oops
       if (_bs->is_armed(nm)) {
@@ -154,7 +154,7 @@ public:
     }
 
     // Clear compiled ICs and exception caches
-    ShenandoahReentrantLocker locker(nm_data->ic_lock());
+    ShenandoahNMethodLocker locker(nm_data->ic_lock());
     nm->unload_nmethod_caches(_unloading_occurred);
   }
 };
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahConcurrentGC.cpp b/src/hotspot/share/gc/shenandoah/shenandoahConcurrentGC.cpp
index 364279deafe..5206a0558e8 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahConcurrentGC.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahConcurrentGC.cpp
@@ -1023,7 +1023,7 @@ public:
 
   void do_nmethod(nmethod* n) {
     ShenandoahNMethod* data = ShenandoahNMethod::gc_data(n);
-    ShenandoahReentrantLocker locker(data->lock());
+    ShenandoahNMethodLocker locker(data->lock());
     // Setup EvacOOM scope below reentrant lock to avoid deadlock with
     // nmethod_entry_barrier
     ShenandoahEvacOOMScope oom;
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahFreeSet.hpp b/src/hotspot/share/gc/shenandoah/shenandoahFreeSet.hpp
index 91c6024d522..d55a06d5713 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahFreeSet.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahFreeSet.hpp
@@ -32,8 +32,8 @@
 #include "gc/shenandoah/shenandoahSimpleBitMap.hpp"
 #include "logging/logStream.hpp"
 
-typedef ShenandoahLock    ShenandoahRebuildLock;
-typedef ShenandoahLocker  ShenandoahRebuildLocker;
+typedef ShenandoahLock                           ShenandoahRebuildLock;
+typedef ShenandoahLocker<ShenandoahRebuildLock>  ShenandoahRebuildLocker;
 
 // Each ShenandoahHeapRegion is associated with a ShenandoahFreeSetPartitionId.
 enum class ShenandoahFreeSetPartitionId : uint8_t {
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp b/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
index 9dd837b90d2..d78bdae6a51 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
@@ -2834,3 +2834,13 @@ void ShenandoahHeap::log_heap_status(const char* msg) const {
     global_generation()->log_status(msg);
   }
 }
+
+ShenandoahHeapLocker::ShenandoahHeapLocker(ShenandoahHeapLock* lock, bool allow_block_for_safepoint) : _lock(lock) {
+#ifdef ASSERT
+  ShenandoahFreeSet* free_set = ShenandoahHeap::heap()->free_set();
+  // free_set is nullptr only at pre-initialized state
+  assert(free_set == nullptr || !free_set->rebuild_lock()->owned_by_self(), "Dead lock, can't acquire heap lock while holding free-set rebuild lock");
+  assert(_lock != nullptr, "Must not");
+#endif
+  _lock->lock(allow_block_for_safepoint);
+}
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp b/src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
index 4a4499667ff..85ad339469d 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
@@ -117,9 +117,23 @@ public:
   virtual bool is_thread_safe() { return false; }
 };
 
-typedef ShenandoahLock    ShenandoahHeapLock;
-typedef ShenandoahLocker  ShenandoahHeapLocker;
-typedef Stack<oop, mtGC>  ShenandoahScanObjectStack;
+typedef ShenandoahLock                       ShenandoahHeapLock;
+// ShenandoahHeapLocker implements locker to assure mutually exclusive access to the global heap data structures.
+// Asserts in the implementation detect potential deadlock usage with regards the rebuild lock that is present
+// in ShenandoahFreeSet.  Whenever both locks are acquired, this lock should be acquired before the
+// ShenandoahFreeSet rebuild lock.
+class ShenandoahHeapLocker : public StackObj {
+private:
+  ShenandoahHeapLock* _lock;
+public:
+  ShenandoahHeapLocker(ShenandoahHeapLock* lock, bool allow_block_for_safepoint = false);
+
+  ~ShenandoahHeapLocker() {
+    _lock->unlock();
+  }
+};
+
+typedef Stack<oop, mtGC>                     ShenandoahScanObjectStack;
 
 // Shenandoah GC is low-pause concurrent GC that uses a load reference barrier
 // for concurent evacuation and a snapshot-at-the-beginning write barrier for
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahLock.cpp b/src/hotspot/share/gc/shenandoah/shenandoahLock.cpp
index 7eec0b9af64..7e317f53424 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahLock.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahLock.cpp
@@ -93,7 +93,7 @@ ShenandoahSimpleLock::ShenandoahSimpleLock() {
   assert(os::mutex_init_done(), "Too early!");
 }
 
-void ShenandoahSimpleLock::lock() {
+void ShenandoahSimpleLock::lock(bool allow_block_for_safepoint) {
   _lock.lock();
 }
 
@@ -101,28 +101,31 @@ void ShenandoahSimpleLock::unlock() {
   _lock.unlock();
 }
 
-ShenandoahReentrantLock::ShenandoahReentrantLock() :
-  ShenandoahSimpleLock(), _owner(nullptr), _count(0) {
-  assert(os::mutex_init_done(), "Too early!");
+template<typename Lock>
+ShenandoahReentrantLock<Lock>::ShenandoahReentrantLock() :
+  Lock(), _owner(nullptr), _count(0) {
 }
 
-ShenandoahReentrantLock::~ShenandoahReentrantLock() {
+template<typename Lock>
+ShenandoahReentrantLock<Lock>::~ShenandoahReentrantLock() {
   assert(_count == 0, "Unbalance");
 }
 
-void ShenandoahReentrantLock::lock() {
+template<typename Lock>
+void ShenandoahReentrantLock<Lock>::lock(bool allow_block_for_safepoint) {
   Thread* const thread = Thread::current();
   Thread* const owner = _owner.load_relaxed();
 
   if (owner != thread) {
-    ShenandoahSimpleLock::lock();
+    Lock::lock(allow_block_for_safepoint);
     _owner.store_relaxed(thread);
   }
 
   _count++;
 }
 
-void ShenandoahReentrantLock::unlock() {
+template<typename Lock>
+void ShenandoahReentrantLock<Lock>::unlock() {
   assert(owned_by_self(), "Invalid owner");
   assert(_count > 0, "Invalid count");
 
@@ -130,12 +133,17 @@ void ShenandoahReentrantLock::unlock() {
 
   if (_count == 0) {
     _owner.store_relaxed((Thread*)nullptr);
-    ShenandoahSimpleLock::unlock();
+    Lock::unlock();
   }
 }
 
-bool ShenandoahReentrantLock::owned_by_self() const {
+template<typename Lock>
+bool ShenandoahReentrantLock<Lock>::owned_by_self() const {
   Thread* const thread = Thread::current();
   Thread* const owner = _owner.load_relaxed();
   return owner == thread;
 }
+
+// Explicit template instantiation
+template class ShenandoahReentrantLock<ShenandoahSimpleLock>;
+template class ShenandoahReentrantLock<ShenandoahLock>;
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahLock.hpp b/src/hotspot/share/gc/shenandoah/shenandoahLock.hpp
index 2e44810cd5d..7c91df191e5 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahLock.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahLock.hpp
@@ -31,7 +31,7 @@
 #include "runtime/javaThread.hpp"
 #include "runtime/safepoint.hpp"
 
-class ShenandoahLock  {
+class ShenandoahLock {
 private:
   enum LockState { unlocked = 0, locked = 1 };
 
@@ -48,7 +48,7 @@ private:
 public:
   ShenandoahLock() : _state(unlocked), _owner(nullptr) {};
 
-  void lock(bool allow_block_for_safepoint) {
+  void lock(bool allow_block_for_safepoint = false) {
     assert(_owner.load_relaxed() != Thread::current(), "reentrant locking attempt, would deadlock");
 
     if ((allow_block_for_safepoint && SafepointSynchronize::is_synchronizing()) ||
@@ -83,34 +83,19 @@ public:
   }
 };
 
-class ShenandoahLocker : public StackObj {
-private:
-  ShenandoahLock* const _lock;
-public:
-  ShenandoahLocker(ShenandoahLock* lock, bool allow_block_for_safepoint = false) : _lock(lock) {
-    if (_lock != nullptr) {
-      _lock->lock(allow_block_for_safepoint);
-    }
-  }
-
-  ~ShenandoahLocker() {
-    if (_lock != nullptr) {
-      _lock->unlock();
-    }
-  }
-};
-
+// Simple lock using PlatformMonitor
 class ShenandoahSimpleLock {
 private:
   PlatformMonitor   _lock; // native lock
 public:
   ShenandoahSimpleLock();
-
-  virtual void lock();
-  virtual void unlock();
+  void lock(bool allow_block_for_safepoint = false);
+  void unlock();
 };
 
-class ShenandoahReentrantLock : public ShenandoahSimpleLock {
+// templated reentrant lock
+template<typename Lock>
+class ShenandoahReentrantLock : public Lock {
 private:
   Atomic<Thread*>       _owner;
   uint64_t              _count;
@@ -119,30 +104,25 @@ public:
   ShenandoahReentrantLock();
   ~ShenandoahReentrantLock();
 
-  virtual void lock();
-  virtual void unlock();
+  void lock(bool allow_block_for_safepoint = false);
+  void unlock();
 
   // If the lock already owned by this thread
   bool owned_by_self() const ;
 };
 
-class ShenandoahReentrantLocker : public StackObj {
-private:
-  ShenandoahReentrantLock* const _lock;
-
+// template based ShenandoahLocker
+template<typename Lock>
+class ShenandoahLocker : public StackObj {
+  Lock* const _lock;
 public:
-  ShenandoahReentrantLocker(ShenandoahReentrantLock* lock) :
-    _lock(lock) {
-    if (_lock != nullptr) {
-      _lock->lock();
-    }
+  ShenandoahLocker(Lock* lock, bool allow_block_for_safepoint = false) : _lock(lock) {
+    assert(_lock != nullptr, "Must not");
+    _lock->lock(allow_block_for_safepoint);
   }
 
-  ~ShenandoahReentrantLocker() {
-    if (_lock != nullptr) {
-      assert(_lock->owned_by_self(), "Must be owner");
-      _lock->unlock();
-    }
+  ~ShenandoahLocker() {
+    _lock->unlock();
   }
 };
 
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahNMethod.cpp b/src/hotspot/share/gc/shenandoah/shenandoahNMethod.cpp
index facaefd4b62..594ad614d90 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahNMethod.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahNMethod.cpp
@@ -241,7 +241,7 @@ void ShenandoahNMethodTable::register_nmethod(nmethod* nm) {
     assert(nm == data->nm(), "Must be same nmethod");
     // Prevent updating a nmethod while concurrent iteration is in progress.
     wait_until_concurrent_iteration_done();
-    ShenandoahReentrantLocker data_locker(data->lock());
+    ShenandoahNMethodLocker data_locker(data->lock());
     data->update();
   } else {
     // For a new nmethod, we can safely append it to the list, because
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahNMethod.hpp b/src/hotspot/share/gc/shenandoah/shenandoahNMethod.hpp
index 77faf6c0dcb..2686b4f4985 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahNMethod.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahNMethod.hpp
@@ -33,6 +33,10 @@
 #include "runtime/atomic.hpp"
 #include "utilities/growableArray.hpp"
 
+// Use ShenandoahReentrantLock as ShenandoahNMethodLock
+typedef ShenandoahReentrantLock<ShenandoahSimpleLock> ShenandoahNMethodLock;
+typedef ShenandoahLocker<ShenandoahNMethodLock>       ShenandoahNMethodLocker;
+
 // ShenandoahNMethod tuple records the internal locations of oop slots within reclocation stream in
 // the nmethod. This allows us to quickly scan the oops without doing the nmethod-internal scans,
 // that sometimes involves parsing the machine code. Note it does not record the oops themselves,
@@ -44,16 +48,16 @@ private:
   int                     _oops_count;
   bool                    _has_non_immed_oops;
   bool                    _unregistered;
-  ShenandoahReentrantLock _lock;
-  ShenandoahReentrantLock _ic_lock;
+  ShenandoahNMethodLock   _lock;
+  ShenandoahNMethodLock   _ic_lock;
 
 public:
   ShenandoahNMethod(nmethod *nm, GrowableArray<oop*>& oops, bool has_non_immed_oops);
   ~ShenandoahNMethod();
 
   inline nmethod* nm() const;
-  inline ShenandoahReentrantLock* lock();
-  inline ShenandoahReentrantLock* ic_lock();
+  inline ShenandoahNMethodLock* lock();
+  inline ShenandoahNMethodLock* ic_lock();
   inline void oops_do(OopClosure* oops, bool fix_relocations = false);
   // Update oops when the nmethod is re-registered
   void update();
@@ -61,8 +65,8 @@ public:
   inline bool is_unregistered() const;
 
   static ShenandoahNMethod* for_nmethod(nmethod* nm);
-  static inline ShenandoahReentrantLock* lock_for_nmethod(nmethod* nm);
-  static inline ShenandoahReentrantLock* ic_lock_for_nmethod(nmethod* nm);
+  static inline ShenandoahNMethodLock* lock_for_nmethod(nmethod* nm);
+  static inline ShenandoahNMethodLock* ic_lock_for_nmethod(nmethod* nm);
 
   static void heal_nmethod(nmethod* nm);
   static inline void heal_nmethod_metadata(ShenandoahNMethod* nmethod_data);
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahNMethod.inline.hpp b/src/hotspot/share/gc/shenandoah/shenandoahNMethod.inline.hpp
index 6758298675b..ef9e347b821 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahNMethod.inline.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahNMethod.inline.hpp
@@ -35,11 +35,11 @@ nmethod* ShenandoahNMethod::nm() const {
   return _nm;
 }
 
-ShenandoahReentrantLock* ShenandoahNMethod::lock() {
+ShenandoahNMethodLock* ShenandoahNMethod::lock() {
   return &_lock;
 }
 
-ShenandoahReentrantLock* ShenandoahNMethod::ic_lock() {
+ShenandoahNMethodLock* ShenandoahNMethod::ic_lock() {
   return &_ic_lock;
 }
 
@@ -85,11 +85,11 @@ void ShenandoahNMethod::attach_gc_data(nmethod* nm, ShenandoahNMethod* gc_data)
   nm->set_gc_data<ShenandoahNMethod>(gc_data);
 }
 
-ShenandoahReentrantLock* ShenandoahNMethod::lock_for_nmethod(nmethod* nm) {
+ShenandoahNMethodLock* ShenandoahNMethod::lock_for_nmethod(nmethod* nm) {
   return gc_data(nm)->lock();
 }
 
-ShenandoahReentrantLock* ShenandoahNMethod::ic_lock_for_nmethod(nmethod* nm) {
+ShenandoahNMethodLock* ShenandoahNMethod::ic_lock_for_nmethod(nmethod* nm) {
   return gc_data(nm)->ic_lock();
 }
 
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp b/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp
index d5e34d02b13..4fda65b4030 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp
@@ -583,7 +583,7 @@ void ShenandoahOldGeneration::handle_failed_evacuation() {
 
 void ShenandoahOldGeneration::handle_failed_promotion(Thread* thread, size_t size) {
   _promotion_failure_count.add_then_fetch(1UL);
-  _promotion_failure_words.and_then_fetch(size);
+  _promotion_failure_words.add_then_fetch(size);
 
   LogTarget(Debug, gc, plab) lt;
   LogStream ls(lt);
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahUnload.cpp b/src/hotspot/share/gc/shenandoah/shenandoahUnload.cpp
index b248fab7958..ac7fe1f9a3a 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahUnload.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahUnload.cpp
@@ -80,7 +80,7 @@ public:
   virtual bool has_dead_oop(nmethod* nm) const {
     assert(ShenandoahHeap::heap()->is_concurrent_weak_root_in_progress(), "Only for this phase");
     ShenandoahNMethod* data = ShenandoahNMethod::gc_data(nm);
-    ShenandoahReentrantLocker locker(data->lock());
+    ShenandoahNMethodLocker locker(data->lock());
     ShenandoahIsUnloadingOopClosure cl;
     data->oops_do(&cl);
     return  cl.is_unloading();
@@ -90,14 +90,14 @@ public:
 class ShenandoahCompiledICProtectionBehaviour : public CompiledICProtectionBehaviour {
 public:
   virtual bool lock(nmethod* nm) {
-    ShenandoahReentrantLock* const lock = ShenandoahNMethod::ic_lock_for_nmethod(nm);
+    ShenandoahNMethodLock* const lock = ShenandoahNMethod::ic_lock_for_nmethod(nm);
     assert(lock != nullptr, "Not yet registered?");
     lock->lock();
     return true;
   }
 
   virtual void unlock(nmethod* nm) {
-    ShenandoahReentrantLock* const lock = ShenandoahNMethod::ic_lock_for_nmethod(nm);
+    ShenandoahNMethodLock* const lock = ShenandoahNMethod::ic_lock_for_nmethod(nm);
     assert(lock != nullptr, "Not yet registered?");
     lock->unlock();
   }
@@ -107,7 +107,7 @@ public:
       return true;
     }
 
-    ShenandoahReentrantLock* const lock = ShenandoahNMethod::ic_lock_for_nmethod(nm);
+    ShenandoahNMethodLock* const lock = ShenandoahNMethod::ic_lock_for_nmethod(nm);
     assert(lock != nullptr, "Not yet registered?");
     return lock->owned_by_self();
   }
diff --git a/src/hotspot/share/interpreter/interpreterRuntime.cpp b/src/hotspot/share/interpreter/interpreterRuntime.cpp
index ca7174389cf..e3cf5d589c2 100644
--- a/src/hotspot/share/interpreter/interpreterRuntime.cpp
+++ b/src/hotspot/share/interpreter/interpreterRuntime.cpp
@@ -711,9 +711,7 @@ void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_ind
   }
 
   ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
-  entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
-  entry->fill_in(info.field_holder(), info.offset(),
-                 checked_cast<u2>(info.index()), checked_cast<u1>(state),
+  entry->fill_in(info, checked_cast<u1>(state),
                  static_cast<u1>(get_code), static_cast<u1>(put_code));
 }
 
@@ -1189,10 +1187,9 @@ JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
 JRT_END
 
 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
-                                                      ResolvedFieldEntry *entry))
+                                                      ResolvedFieldEntry* entry))
 
   // check the access_flags for the field in the klass
-
   InstanceKlass* ik = entry->field_holder();
   int index = entry->field_index();
   if (!ik->field_status(index).is_access_watched()) return;
@@ -1212,11 +1209,10 @@ JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDe
 JRT_END
 
 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
-                                                            ResolvedFieldEntry *entry, jvalue *value))
-
-  InstanceKlass* ik = entry->field_holder();
+                                                            ResolvedFieldEntry* entry, jvalue* value))
 
   // check the access_flags for the field in the klass
+  InstanceKlass* ik = entry->field_holder();
   int index = entry->field_index();
   // bail out if field modifications are not watched
   if (!ik->field_status(index).is_modification_watched()) return;
diff --git a/src/hotspot/share/oops/constantPool.cpp b/src/hotspot/share/oops/constantPool.cpp
index 640b2f2460f..456333efad0 100644
--- a/src/hotspot/share/oops/constantPool.cpp
+++ b/src/hotspot/share/oops/constantPool.cpp
@@ -310,8 +310,9 @@ void ConstantPool::iterate_archivable_resolved_references(Function function) {
     if (method_entries != nullptr) {
       for (int i = 0; i < method_entries->length(); i++) {
         ResolvedMethodEntry* rme = method_entries->adr_at(i);
+        const char* rejection_reason = nullptr;
         if (rme->is_resolved(Bytecodes::_invokehandle) && rme->has_appendix() &&
-            cache()->can_archive_resolved_method(this, rme)) {
+                               cache()->can_archive_resolved_method(this, rme, rejection_reason)) {
           int rr_index = rme->resolved_references_index();
           assert(resolved_reference_at(rr_index) != nullptr, "must exist");
           function(rr_index);
diff --git a/src/hotspot/share/oops/cpCache.cpp b/src/hotspot/share/oops/cpCache.cpp
index 75cdcb5310a..34d7aa10299 100644
--- a/src/hotspot/share/oops/cpCache.cpp
+++ b/src/hotspot/share/oops/cpCache.cpp
@@ -450,12 +450,15 @@ void ConstantPoolCache::remove_resolved_field_entries_if_non_deterministic() {
       Symbol* klass_name = cp->klass_name_at(klass_cp_index);
       Symbol* name = cp->uncached_name_ref_at(cp_index);
       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
-      log.print("%s field  CP entry [%3d]: %s => %s.%s:%s%s",
-                (archived ? "archived" : "reverted"),
-                cp_index,
-                cp->pool_holder()->name()->as_C_string(),
-                klass_name->as_C_string(), name->as_C_string(), signature->as_C_string(),
-                rfi->is_resolved(Bytecodes::_getstatic) || rfi->is_resolved(Bytecodes::_putstatic) ? " *** static" : "");
+      if (resolved) {
+        log.print("%s field  CP entry [%3d]: %s => %s.%s:%s%s%s",
+                  (archived ? "archived" : "reverted"),
+                  cp_index,
+                  cp->pool_holder()->name()->as_C_string(),
+                  klass_name->as_C_string(), name->as_C_string(), signature->as_C_string(),
+                  rfi->is_resolved(Bytecodes::_getstatic) || rfi->is_resolved(Bytecodes::_putstatic) ? " *** static" : "",
+                  (archived ? "" : " (resolution is not deterministic)"));
+      }
     }
     ArchiveBuilder::alloc_stats()->record_field_cp_entry(archived, resolved && !archived);
   }
@@ -474,32 +477,40 @@ void ConstantPoolCache::remove_resolved_method_entries_if_non_deterministic() {
                     rme->is_resolved(Bytecodes::_invokehandle)    ||
                     (rme->is_resolved(Bytecodes::_invokestatic) && VM_Version::supports_fast_class_init_checks());
 
+    const char* rejection_reason = nullptr;
     if (resolved && !CDSConfig::is_dumping_preimage_static_archive()
-        && can_archive_resolved_method(src_cp, rme)) {
+        && can_archive_resolved_method(src_cp, rme, rejection_reason)) {
       rme->mark_and_relocate(src_cp);
       archived = true;
     } else {
       rme->remove_unshareable_info();
     }
-    LogStreamHandle(Trace, aot, resolve) log;
-    if (log.is_enabled()) {
+    LogTarget(Trace, aot, resolve) lt;
+    if (lt.is_enabled()) {
       ResourceMark rm;
       int klass_cp_index = cp->uncached_klass_ref_index_at(cp_index);
       Symbol* klass_name = cp->klass_name_at(klass_cp_index);
       Symbol* name = cp->uncached_name_ref_at(cp_index);
       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
-      log.print("%s%s method CP entry [%3d]: %s %s.%s:%s",
+      LogStream ls(lt);
+      if (resolved) {
+        ls.print("%s%s method CP entry [%3d]: %s %s.%s:%s",
                 (archived ? "archived" : "reverted"),
                 (rme->is_resolved(Bytecodes::_invokeinterface) ? " interface" : ""),
                 cp_index,
                 cp->pool_holder()->name()->as_C_string(),
                 klass_name->as_C_string(), name->as_C_string(), signature->as_C_string());
+        if (rejection_reason != nullptr) {
+          ls.print(" %s", rejection_reason);
+        }
+      }
       if (archived) {
         Klass* resolved_klass = cp->resolved_klass_at(klass_cp_index);
-        log.print(" => %s%s",
+        ls.print(" => %s%s",
                   resolved_klass->name()->as_C_string(),
                   (rme->is_resolved(Bytecodes::_invokestatic) ? " *** static" : ""));
       }
+      ls.cr();
     }
     ArchiveBuilder::alloc_stats()->record_method_cp_entry(archived, resolved && !archived);
   }
@@ -528,42 +539,50 @@ void ConstantPoolCache::remove_resolved_indy_entries_if_non_deterministic() {
       Symbol* bsm_name = cp->uncached_name_ref_at(bsm_ref);
       Symbol* bsm_signature = cp->uncached_signature_ref_at(bsm_ref);
       Symbol* bsm_klass = cp->klass_name_at(cp->uncached_klass_ref_index_at(bsm_ref));
-      log.print("%s indy   CP entry [%3d]: %s (%d)",
-                (archived ? "archived" : "reverted"),
-                cp_index, cp->pool_holder()->name()->as_C_string(), i);
-      log.print(" %s %s.%s:%s", (archived ? "=>" : "  "), bsm_klass->as_C_string(),
-                bsm_name->as_C_string(), bsm_signature->as_C_string());
+      if (resolved) {
+        log.print("%s indy   CP entry [%3d]: %s (%d)",
+                  (archived ? "archived" : "reverted"),
+                  cp_index, cp->pool_holder()->name()->as_C_string(), i);
+        log.print(" %s %s.%s:%s%s", (archived ? "=>" : "  "), bsm_klass->as_C_string(),
+                  bsm_name->as_C_string(), bsm_signature->as_C_string(),
+                  (archived ? "" : " (resolution is not deterministic)"));
+      }
     }
     ArchiveBuilder::alloc_stats()->record_indy_cp_entry(archived, resolved && !archived);
   }
 }
 
-bool ConstantPoolCache::can_archive_resolved_method(ConstantPool* src_cp, ResolvedMethodEntry* method_entry) {
-  LogStreamHandle(Trace, aot, resolve) log;
+bool ConstantPoolCache::can_archive_resolved_method(ConstantPool* src_cp, ResolvedMethodEntry* method_entry, const char*& rejection_reason) {
   InstanceKlass* pool_holder = constant_pool()->pool_holder();
   if (pool_holder->defined_by_other_loaders()) {
     // Archiving resolved cp entries for classes from non-builtin loaders
     // is not yet supported.
+    rejection_reason = "(pool holder comes from a non-builtin loader)";
     return false;
   }
 
   if (CDSConfig::is_dumping_dynamic_archive()) {
     // InstanceKlass::methods() has been resorted. We need to
     // update the vtable_index in method_entry (not implemented)
+    rejection_reason = "(InstanceKlass::methods() has been resorted)";
     return false;
   }
 
   if (!method_entry->is_resolved(Bytecodes::_invokevirtual)) {
     if (method_entry->method() == nullptr) {
+      rejection_reason = "(method entry is not resolved)";
       return false;
     }
     if (method_entry->method()->is_continuation_native_intrinsic()) {
+      rejection_reason = "(corresponding stub is generated on demand during method resolution)";
       return false; // FIXME: corresponding stub is generated on demand during method resolution (see LinkResolver::resolve_static_call).
     }
     if (method_entry->is_resolved(Bytecodes::_invokehandle) && !CDSConfig::is_dumping_method_handles()) {
+      rejection_reason = "(not dumping method handles)";
       return false;
     }
     if (method_entry->method()->is_method_handle_intrinsic() && !CDSConfig::is_dumping_method_handles()) {
+      rejection_reason = "(not dumping intrinsic method handles)";
       return false;
     }
   }
@@ -572,6 +591,7 @@ bool ConstantPoolCache::can_archive_resolved_method(ConstantPool* src_cp, Resolv
   assert(src_cp->tag_at(cp_index).is_method() || src_cp->tag_at(cp_index).is_interface_method(), "sanity");
 
   if (!AOTConstantPoolResolver::is_resolution_deterministic(src_cp, cp_index)) {
+      rejection_reason = "(resolution is not deterministic)";
     return false;
   }
   return true;
diff --git a/src/hotspot/share/oops/cpCache.hpp b/src/hotspot/share/oops/cpCache.hpp
index e9e4f9a40e5..f698f50d3a8 100644
--- a/src/hotspot/share/oops/cpCache.hpp
+++ b/src/hotspot/share/oops/cpCache.hpp
@@ -196,7 +196,7 @@ class ConstantPoolCache: public MetaspaceObj {
 #endif
 
  public:
-  static int size() { return align_metadata_size(sizeof(ConstantPoolCache) / wordSize); }
+  static int size() { return align_metadata_size(sizeof_auto(ConstantPoolCache) / wordSize); }
 
  private:
   // Helpers
@@ -226,7 +226,7 @@ class ConstantPoolCache: public MetaspaceObj {
   void remove_resolved_field_entries_if_non_deterministic();
   void remove_resolved_indy_entries_if_non_deterministic();
   void remove_resolved_method_entries_if_non_deterministic();
-  bool can_archive_resolved_method(ConstantPool* src_cp, ResolvedMethodEntry* method_entry);
+  bool can_archive_resolved_method(ConstantPool* src_cp, ResolvedMethodEntry* method_entry, const char*& rejection_reason);
 #endif
 
   // RedefineClasses support
diff --git a/src/hotspot/share/oops/resolvedFieldEntry.cpp b/src/hotspot/share/oops/resolvedFieldEntry.cpp
index 83f1a6919a6..49e9115ca9a 100644
--- a/src/hotspot/share/oops/resolvedFieldEntry.cpp
+++ b/src/hotspot/share/oops/resolvedFieldEntry.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,7 +24,12 @@
 
 #include "cds/archiveBuilder.hpp"
 #include "cppstdlib/type_traits.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/instanceOop.hpp"
 #include "oops/resolvedFieldEntry.hpp"
+#include "runtime/fieldDescriptor.inline.hpp"
+#include "utilities/checkedCast.hpp"
+#include "utilities/globalDefinitions.hpp"
 
 static_assert(std::is_trivially_copyable_v<ResolvedFieldEntry>);
 
@@ -34,6 +39,19 @@ class ResolvedFieldEntryWithExtra : public ResolvedFieldEntry {
 };
 static_assert(sizeof(ResolvedFieldEntryWithExtra) > sizeof(ResolvedFieldEntry));
 
+void ResolvedFieldEntry::fill_in(const fieldDescriptor& info, u1 tos_state, u1 get_code, u1 put_code) {
+  set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
+  _field_holder = info.field_holder();
+  _field_offset = info.offset();
+  _field_index = checked_cast<u2>(info.index());
+  _tos_state = tos_state;
+
+  // These must be set after the other fields
+  set_bytecode(&_get_code, get_code);
+  set_bytecode(&_put_code, put_code);
+  assert_is_valid();
+}
+
 void ResolvedFieldEntry::print_on(outputStream* st) const {
   st->print_cr("Field Entry:");
 
@@ -52,6 +70,20 @@ void ResolvedFieldEntry::print_on(outputStream* st) const {
   st->print_cr(" - Put Bytecode: %s", Bytecodes::name((Bytecodes::Code)put_code()));
 }
 
+#ifdef ASSERT
+void ResolvedFieldEntry::assert_is_valid() const {
+  assert(field_holder()->is_instance_klass(), "should be instanceKlass");
+  assert(field_offset() >= instanceOopDesc::base_offset_in_bytes(),
+         "field offset out of range %d >= %d", field_offset(), instanceOopDesc::base_offset_in_bytes());
+  assert(as_BasicType((TosState)tos_state()) != T_ILLEGAL, "tos_state is ILLEGAL");
+  assert(_flags < (1 << (max_flag_shift + 1)), "flags are too large %d", _flags);
+  assert((get_code() == 0 || get_code() == Bytecodes::_getstatic || get_code() == Bytecodes::_getfield),
+         "invalid get bytecode %d", get_code());
+  assert((put_code() == 0 || put_code() == Bytecodes::_putstatic || put_code() == Bytecodes::_putfield),
+          "invalid put bytecode %d", put_code());
+}
+#endif
+
 #if INCLUDE_CDS
 void ResolvedFieldEntry::remove_unshareable_info() {
   *this = ResolvedFieldEntry(_cpool_index);
diff --git a/src/hotspot/share/oops/resolvedFieldEntry.hpp b/src/hotspot/share/oops/resolvedFieldEntry.hpp
index 77ad4815730..bdd9999dd63 100644
--- a/src/hotspot/share/oops/resolvedFieldEntry.hpp
+++ b/src/hotspot/share/oops/resolvedFieldEntry.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,7 +26,6 @@
 #define SHARE_OOPS_RESOLVEDFIELDENTRY_HPP
 
 #include "interpreter/bytecodes.hpp"
-#include "oops/instanceKlass.hpp"
 #include "runtime/atomicAccess.hpp"
 #include "utilities/checkedCast.hpp"
 #include "utilities/sizes.hpp"
@@ -46,7 +45,8 @@
 // The explicit paddings are necessary for generating deterministic CDS archives. They prevent
 // the C++ compiler from potentially inserting random values in unused gaps.
 
-//class InstanceKlass;
+class InstanceKlass;
+
 class ResolvedFieldEntry {
   friend class VMStructs;
 
@@ -84,6 +84,7 @@ public:
   enum {
       is_volatile_shift     = 0,
       is_final_shift        = 1, // unused
+      max_flag_shift        = is_final_shift
   };
 
   // Getters
@@ -113,6 +114,7 @@ public:
   // Printing
   void print_on(outputStream* st) const;
 
+ private:
   void set_flags(bool is_final_flag, bool is_volatile_flag) {
     int new_flags = (is_final_flag << is_final_shift) | static_cast<int>(is_volatile_flag);
     _flags = checked_cast<u1>(new_flags);
@@ -129,17 +131,12 @@ public:
     AtomicAccess::release_store(code, new_code);
   }
 
-  // Populate the strucutre with resolution information
-  void fill_in(InstanceKlass* klass, int offset, u2 index, u1 tos_state, u1 b1, u1 b2) {
-    _field_holder = klass;
-    _field_offset = offset;
-    _field_index = index;
-    _tos_state = tos_state;
+   // Debug help
+  void assert_is_valid() const NOT_DEBUG_RETURN;
 
-    // These must be set after the other fields
-    set_bytecode(&_get_code, b1);
-    set_bytecode(&_put_code, b2);
-  }
+ public:
+  // Populate the strucutre with resolution information
+  void fill_in(const fieldDescriptor& info, u1 tos_state, u1 get_code, u1 put_code);
 
   // CDS
 #if INCLUDE_CDS
@@ -155,7 +152,6 @@ public:
   static ByteSize put_code_offset()     { return byte_offset_of(ResolvedFieldEntry, _put_code);     }
   static ByteSize type_offset()         { return byte_offset_of(ResolvedFieldEntry, _tos_state);    }
   static ByteSize flags_offset()        { return byte_offset_of(ResolvedFieldEntry, _flags);        }
-
 };
 
 #endif //SHARE_OOPS_RESOLVEDFIELDENTRY_HPP
diff --git a/src/hotspot/share/opto/graphKit.cpp b/src/hotspot/share/opto/graphKit.cpp
index 084b137f313..c969abb85bb 100644
--- a/src/hotspot/share/opto/graphKit.cpp
+++ b/src/hotspot/share/opto/graphKit.cpp
@@ -1177,7 +1177,21 @@ bool GraphKit::compute_stack_effects(int& inputs, int& depth) {
 //------------------------------basic_plus_adr---------------------------------
 Node* GraphKit::basic_plus_adr(Node* base, Node* ptr, Node* offset) {
   // short-circuit a common case
-  if (offset == intcon(0))  return ptr;
+  if (offset == MakeConX(0)) {
+    return ptr;
+  }
+#ifdef ASSERT
+  // Both 32-bit and 64-bit zeros should have been handled by the previous `if`
+  // statement, so if we see either 32-bit or 64-bit zeros here, then we have a
+  // problem.
+  if (offset->is_Con()) {
+    const Type* t = offset->bottom_type();
+    bool is_zero_int = t->isa_int() && t->is_int()->get_con() == 0;
+    bool is_zero_long = t->isa_long() && t->is_long()->get_con() == 0;
+    assert(!is_zero_int && !is_zero_long,
+           "Unexpected zero offset - should have matched MakeConX(0)");
+  }
+#endif
   return _gvn.transform( new AddPNode(base, ptr, offset) );
 }
 
diff --git a/src/hotspot/share/opto/idealKit.cpp b/src/hotspot/share/opto/idealKit.cpp
index dd7e9ae52b7..fbb61bfdf72 100644
--- a/src/hotspot/share/opto/idealKit.cpp
+++ b/src/hotspot/share/opto/idealKit.cpp
@@ -360,6 +360,17 @@ Node* IdealKit::load(Node* ctl,
   return transform(ld);
 }
 
+// Load AOT runtime constant
+Node* IdealKit::load_aot_const(Node* adr, const Type* t) {
+  BasicType bt = t->basic_type();
+  const TypePtr* adr_type = nullptr; // debug-mode-only argument
+  DEBUG_ONLY(adr_type = C->get_adr_type(Compile::AliasIdxRaw));
+  Node* ctl = (Node*)C->root(); // Raw memory access needs control
+  Node* ld = LoadNode::make(_gvn, ctl, C->immutable_memory(), adr, adr_type, t, bt, MemNode::unordered,
+                            LoadNode::DependsOnlyOnTest, false, false, false, false, 0);
+  return transform(ld);
+}
+
 Node* IdealKit::store(Node* ctl, Node* adr, Node *val, BasicType bt,
                       int adr_idx,
                       MemNode::MemOrd mo, bool require_atomic_access,
diff --git a/src/hotspot/share/opto/idealKit.hpp b/src/hotspot/share/opto/idealKit.hpp
index 280f61fd9a9..518c3b92136 100644
--- a/src/hotspot/share/opto/idealKit.hpp
+++ b/src/hotspot/share/opto/idealKit.hpp
@@ -224,6 +224,9 @@ class IdealKit: public StackObj {
              MemNode::MemOrd mo = MemNode::unordered,
              LoadNode::ControlDependency control_dependency = LoadNode::DependsOnlyOnTest);
 
+  // Load AOT runtime constant
+  Node* load_aot_const(Node* adr, const Type* t);
+
   // Return the new StoreXNode
   Node* store(Node* ctl,
               Node* adr,
diff --git a/src/hotspot/share/opto/subnode.hpp b/src/hotspot/share/opto/subnode.hpp
index a90661c49ee..54cb1d20cd0 100644
--- a/src/hotspot/share/opto/subnode.hpp
+++ b/src/hotspot/share/opto/subnode.hpp
@@ -564,6 +564,9 @@ public:
   const Type* bottom_type() const { return Type::HALF_FLOAT; }
   virtual uint ideal_reg() const { return Op_RegF; }
   virtual const Type* Value(PhaseGVN* phase) const;
+
+private:
+  virtual bool depends_only_on_test_impl() const { return false; }
 };
 
 
diff --git a/src/hotspot/share/opto/type.cpp b/src/hotspot/share/opto/type.cpp
index c637737eef9..1a0872ee0e6 100644
--- a/src/hotspot/share/opto/type.cpp
+++ b/src/hotspot/share/opto/type.cpp
@@ -97,7 +97,7 @@ const Type::TypeInfo Type::_type_info[Type::lastype] = {
   { Bad,             T_ILLEGAL,    "vectorz:",      false, Op_VecZ,              relocInfo::none          },  // VectorZ
 #endif
   { Bad,             T_ADDRESS,    "anyptr:",       false, Op_RegP,              relocInfo::none          },  // AnyPtr
-  { Bad,             T_ADDRESS,    "rawptr:",       false, Op_RegP,              relocInfo::none          },  // RawPtr
+  { Bad,             T_ADDRESS,    "rawptr:",       false, Op_RegP,              relocInfo::external_word_type },  // RawPtr
   { Bad,             T_OBJECT,     "oop:",          true,  Op_RegP,              relocInfo::oop_type      },  // OopPtr
   { Bad,             T_OBJECT,     "inst:",         true,  Op_RegP,              relocInfo::oop_type      },  // InstPtr
   { Bad,             T_OBJECT,     "ary:",          true,  Op_RegP,              relocInfo::oop_type      },  // AryPtr
diff --git a/src/hotspot/share/prims/jvm.cpp b/src/hotspot/share/prims/jvm.cpp
index 2b3a2966c27..423e1a5a1f4 100644
--- a/src/hotspot/share/prims/jvm.cpp
+++ b/src/hotspot/share/prims/jvm.cpp
@@ -3641,7 +3641,9 @@ JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
 
   int index = 0;
   for (int j = 0; j < num_flags; j++, index++) {
-    Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
+    stringStream prefixed;
+    prefixed.print("-XX:%s", vm_flags[j]);
+    Handle h = java_lang_String::create_from_platform_dependent_str(prefixed.base(), CHECK_NULL);
     result_h->obj_at_put(index, h());
   }
   for (int i = 0; i < num_args; i++, index++) {
diff --git a/src/hotspot/share/prims/jvmtiEnvBase.cpp b/src/hotspot/share/prims/jvmtiEnvBase.cpp
index 4894a4dd21a..401bb4dfdb8 100644
--- a/src/hotspot/share/prims/jvmtiEnvBase.cpp
+++ b/src/hotspot/share/prims/jvmtiEnvBase.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -2491,7 +2491,7 @@ SetOrClearFramePopClosure::do_thread(Thread *target) {
     _result = JVMTI_ERROR_NO_MORE_FRAMES;
     return;
   }
-  assert(_state->get_thread_or_saved() == java_thread, "Must be");
+  assert(_state->get_thread() == java_thread, "Must be");
 
   RegisterMap reg_map(java_thread,
                       RegisterMap::UpdateMap::include,
diff --git a/src/hotspot/share/prims/jvmtiEnvThreadState.cpp b/src/hotspot/share/prims/jvmtiEnvThreadState.cpp
index 571c4ca5528..303923076b1 100644
--- a/src/hotspot/share/prims/jvmtiEnvThreadState.cpp
+++ b/src/hotspot/share/prims/jvmtiEnvThreadState.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -151,11 +151,6 @@ bool JvmtiEnvThreadState::is_virtual() {
   return _state->is_virtual();
 }
 
-// Use _thread_saved if cthread is detached from JavaThread (_thread == nullptr).
-JavaThread* JvmtiEnvThreadState::get_thread_or_saved() {
-  return _state->get_thread_or_saved();
-}
-
 JavaThread* JvmtiEnvThreadState::get_thread() {
   return _state->get_thread();
 }
@@ -344,7 +339,7 @@ void JvmtiEnvThreadState::reset_current_location(jvmtiEvent event_type, bool ena
   if (enabled) {
     // If enabling breakpoint, no need to reset.
     // Can't do anything if empty stack.
-    JavaThread* thread = get_thread_or_saved();
+    JavaThread* thread = get_thread();
 
     if (event_type == JVMTI_EVENT_SINGLE_STEP &&
         ((thread == nullptr && is_virtual()) || thread->has_last_Java_frame())) {
diff --git a/src/hotspot/share/prims/jvmtiEnvThreadState.hpp b/src/hotspot/share/prims/jvmtiEnvThreadState.hpp
index a2ab25a59dd..16b369e0857 100644
--- a/src/hotspot/share/prims/jvmtiEnvThreadState.hpp
+++ b/src/hotspot/share/prims/jvmtiEnvThreadState.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -170,8 +170,6 @@ public:
 
   inline JvmtiThreadState* jvmti_thread_state() { return _state; }
 
-  // use _thread_saved if cthread is detached from JavaThread
-  JavaThread *get_thread_or_saved();
   JavaThread *get_thread();
   inline JvmtiEnv *get_env() { return _env; }
 
diff --git a/src/hotspot/share/prims/jvmtiEventController.cpp b/src/hotspot/share/prims/jvmtiEventController.cpp
index 9df3bbb4b3e..cb44b833c48 100644
--- a/src/hotspot/share/prims/jvmtiEventController.cpp
+++ b/src/hotspot/share/prims/jvmtiEventController.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -217,6 +217,10 @@ class EnterInterpOnlyModeClosure : public HandshakeClosure {
 
     assert(state != nullptr, "sanity check");
     assert(state->get_thread() == jt, "handshake unsafe conditions");
+    assert(jt->jvmti_thread_state() == state, "sanity check");
+    assert(!jt->is_interp_only_mode(), "sanity check");
+    assert(!state->is_interp_only_mode(), "sanity check");
+
     if (!state->is_pending_interp_only_mode()) {
       _completed = true;
       return;  // The pending flag has been already cleared, so bail out.
@@ -361,7 +365,8 @@ void VM_ChangeSingleStep::doit() {
 
 void JvmtiEventControllerPrivate::enter_interp_only_mode(JvmtiThreadState *state) {
   EC_TRACE(("[%s] # Entering interpreter only mode",
-            JvmtiTrace::safe_get_thread_name(state->get_thread_or_saved())));
+            JvmtiTrace::safe_get_thread_name(state->get_thread())));
+
   JavaThread *target = state->get_thread();
   Thread *current = Thread::current();
 
@@ -371,8 +376,13 @@ void JvmtiEventControllerPrivate::enter_interp_only_mode(JvmtiThreadState *state
   }
   // This flag will be cleared in EnterInterpOnlyModeClosure handshake.
   state->set_pending_interp_only_mode(true);
-  if (target == nullptr) { // an unmounted virtual thread
-    return;  // EnterInterpOnlyModeClosure will be executed right after mount.
+
+  // There are two cases when entering interp_only_mode is postponed:
+  // 1. Unmounted virtual thread - EnterInterpOnlyModeClosure::do_thread will be executed at mount;
+  // 2. Carrier thread with mounted virtual thread - EnterInterpOnlyModeClosure::do_thread will be executed at unmount.
+  if (target == nullptr ||                                                         // an unmounted virtual thread
+      JvmtiEnvBase::is_thread_carrying_vthread(target, state->get_thread_oop())) { // a vthread carrying thread
+    return;  // EnterInterpOnlyModeClosure will be executed right after mount or unmount.
   }
   EnterInterpOnlyModeClosure hs(state);
   if (target->is_handshake_safe_for(current)) {
@@ -388,7 +398,8 @@ void JvmtiEventControllerPrivate::enter_interp_only_mode(JvmtiThreadState *state
 void
 JvmtiEventControllerPrivate::leave_interp_only_mode(JvmtiThreadState *state) {
   EC_TRACE(("[%s] # Leaving interpreter only mode",
-            JvmtiTrace::safe_get_thread_name(state->get_thread_or_saved())));
+            JvmtiTrace::safe_get_thread_name(state->get_thread())));
+
   if (state->is_pending_interp_only_mode()) {
     state->set_pending_interp_only_mode(false);  // Just clear the pending flag.
     assert(!state->is_interp_only_mode(), "sanity check");
@@ -409,7 +420,7 @@ JvmtiEventControllerPrivate::trace_changed(JvmtiThreadState *state, jlong now_en
       if (changed & bit) {
         // it changed, print it
          log_trace(jvmti)("[%s] # %s event %s",
-                      JvmtiTrace::safe_get_thread_name(state->get_thread_or_saved()),
+                      JvmtiTrace::safe_get_thread_name(state->get_thread()),
                       (now_enabled & bit)? "Enabling" : "Disabling", JvmtiTrace::event_name((jvmtiEvent)ei));
       }
     }
@@ -932,7 +943,7 @@ JvmtiEventControllerPrivate::set_user_enabled(JvmtiEnvBase *env, JavaThread *thr
 void
 JvmtiEventControllerPrivate::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
   EC_TRACE(("[%s] # set frame pop - frame=%d",
-            JvmtiTrace::safe_get_thread_name(ets->get_thread_or_saved()),
+            JvmtiTrace::safe_get_thread_name(ets->get_thread()),
             fpop.frame_number() ));
 
   ets->get_frame_pops()->set(fpop);
@@ -943,7 +954,7 @@ JvmtiEventControllerPrivate::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFrameP
 void
 JvmtiEventControllerPrivate::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
   EC_TRACE(("[%s] # clear frame pop - frame=%d",
-            JvmtiTrace::safe_get_thread_name(ets->get_thread_or_saved()),
+            JvmtiTrace::safe_get_thread_name(ets->get_thread()),
             fpop.frame_number() ));
 
   ets->get_frame_pops()->clear(fpop);
@@ -953,7 +964,7 @@ JvmtiEventControllerPrivate::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFram
 void
 JvmtiEventControllerPrivate::clear_all_frame_pops(JvmtiEnvThreadState *ets) {
   EC_TRACE(("[%s] # clear all frame pops",
-            JvmtiTrace::safe_get_thread_name(ets->get_thread_or_saved())
+            JvmtiTrace::safe_get_thread_name(ets->get_thread())
           ));
 
   ets->get_frame_pops()->clear_all();
@@ -965,7 +976,7 @@ JvmtiEventControllerPrivate::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiF
   int cleared_cnt = ets->get_frame_pops()->clear_to(fpop);
 
   EC_TRACE(("[%s] # clear to frame pop - frame=%d, count=%d",
-            JvmtiTrace::safe_get_thread_name(ets->get_thread_or_saved()),
+            JvmtiTrace::safe_get_thread_name(ets->get_thread()),
             fpop.frame_number(),
             cleared_cnt ));
 
diff --git a/src/hotspot/share/prims/jvmtiThreadState.cpp b/src/hotspot/share/prims/jvmtiThreadState.cpp
index d7accfd9a0a..32bf2c4e98e 100644
--- a/src/hotspot/share/prims/jvmtiThreadState.cpp
+++ b/src/hotspot/share/prims/jvmtiThreadState.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -57,7 +57,6 @@ JvmtiThreadState::JvmtiThreadState(JavaThread* thread, oop thread_oop)
   : _thread_event_enable() {
   assert(JvmtiThreadState_lock->is_locked(), "sanity check");
   _thread               = thread;
-  _thread_saved         = nullptr;
   _exception_state      = ES_CLEARED;
   _hide_single_stepping = false;
   _pending_interp_only_mode = false;
@@ -118,11 +117,11 @@ JvmtiThreadState::JvmtiThreadState(JavaThread* thread, oop thread_oop)
 
   if (thread != nullptr) {
     if (thread_oop == nullptr || thread->jvmti_vthread() == nullptr || thread->jvmti_vthread() == thread_oop) {
-      // The JavaThread for carrier or mounted virtual thread case.
+      // The JavaThread for an active carrier or a mounted virtual thread case.
       // Set this only if thread_oop is current thread->jvmti_vthread().
       thread->set_jvmti_thread_state(this);
+      assert(!thread->is_interp_only_mode(), "sanity check");
     }
-    thread->set_interp_only_mode(false);
   }
 }
 
@@ -135,7 +134,10 @@ JvmtiThreadState::~JvmtiThreadState()   {
   }
 
   // clear this as the state for the thread
+  assert(get_thread() != nullptr, "sanity check");
+  assert(get_thread()->jvmti_thread_state() == this, "sanity check");
   get_thread()->set_jvmti_thread_state(nullptr);
+  get_thread()->set_interp_only_mode(false);
 
   // zap our env thread states
   {
@@ -323,6 +325,9 @@ void JvmtiThreadState::enter_interp_only_mode() {
   assert(_thread != nullptr, "sanity check");
   assert(JvmtiThreadState_lock->is_locked(), "sanity check");
   assert(!is_interp_only_mode(), "entering interp only when in interp only mode");
+  assert(_thread->jvmti_vthread() == nullptr || _thread->jvmti_vthread() == get_thread_oop(), "sanity check");
+  assert(_thread->jvmti_thread_state() == this, "sanity check");
+  _saved_interp_only_mode = true;
   _thread->set_interp_only_mode(true);
   invalidate_cur_stack_depth();
 }
@@ -330,10 +335,9 @@ void JvmtiThreadState::enter_interp_only_mode() {
 void JvmtiThreadState::leave_interp_only_mode() {
   assert(JvmtiThreadState_lock->is_locked(), "sanity check");
   assert(is_interp_only_mode(), "leaving interp only when not in interp only mode");
-  if (_thread == nullptr) {
-    // Unmounted virtual thread updates the saved value.
-    _saved_interp_only_mode = false;
-  } else {
+  _saved_interp_only_mode = false;
+  if (_thread != nullptr && _thread->jvmti_thread_state() == this) {
+    assert(_thread->jvmti_vthread() == nullptr || _thread->jvmti_vthread() == get_thread_oop(), "sanity check");
     _thread->set_interp_only_mode(false);
   }
 }
@@ -341,7 +345,7 @@ void JvmtiThreadState::leave_interp_only_mode() {
 
 // Helper routine used in several places
 int JvmtiThreadState::count_frames() {
-  JavaThread* thread = get_thread_or_saved();
+  JavaThread* thread = get_thread();
   javaVFrame *jvf;
   ResourceMark rm;
   if (thread == nullptr) {
@@ -578,11 +582,8 @@ void JvmtiThreadState::update_thread_oop_during_vm_start() {
   }
 }
 
+// For virtual threads only.
 void JvmtiThreadState::set_thread(JavaThread* thread) {
-  _thread_saved = nullptr;  // Common case.
-  if (!_is_virtual && thread == nullptr) {
-    // Save JavaThread* if carrier thread is being detached.
-    _thread_saved = _thread;
-  }
+  assert(is_virtual(), "sanity check");
   _thread = thread;
 }
diff --git a/src/hotspot/share/prims/jvmtiThreadState.hpp b/src/hotspot/share/prims/jvmtiThreadState.hpp
index 866d8828c4c..fa77518a8b6 100644
--- a/src/hotspot/share/prims/jvmtiThreadState.hpp
+++ b/src/hotspot/share/prims/jvmtiThreadState.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -123,8 +123,11 @@ class JvmtiVTSuspender : AllStatic {
 class JvmtiThreadState : public CHeapObj<mtInternal> {
  private:
   friend class JvmtiEnv;
+  // The _thread field is a link to the JavaThread associated with JvmtiThreadState.
+  // A platform (including carrier) thread should always have a stable link to its JavaThread.
+  // The _thread field of a virtual thread should point to the JavaThread when
+  // virtual thread is mounted. It should be set to null when it is unmounted.
   JavaThread        *_thread;
-  JavaThread        *_thread_saved;
   OopHandle         _thread_oop_h;
   // Jvmti Events that cannot be posted in their current context.
   JvmtiDeferredEventQueue* _jvmti_event_queue;
@@ -219,7 +222,7 @@ class JvmtiThreadState : public CHeapObj<mtInternal> {
 
   // Used by the interpreter for fullspeed debugging support
   bool is_interp_only_mode()                {
-    return _thread == nullptr ? _saved_interp_only_mode : _thread->is_interp_only_mode();
+    return _saved_interp_only_mode;
   }
   void enter_interp_only_mode();
   void leave_interp_only_mode();
@@ -248,8 +251,10 @@ class JvmtiThreadState : public CHeapObj<mtInternal> {
 
   int count_frames();
 
-  inline JavaThread *get_thread()      { return _thread;              }
-  inline JavaThread *get_thread_or_saved(); // return _thread_saved if _thread is null
+  inline JavaThread *get_thread()      {
+    assert(is_virtual() || _thread != nullptr, "sanity check");
+    return _thread;
+  }
 
   // Needed for virtual threads as they can migrate to different JavaThread's.
   // Also used for carrier threads to clear/restore _thread.
diff --git a/src/hotspot/share/prims/jvmtiThreadState.inline.hpp b/src/hotspot/share/prims/jvmtiThreadState.inline.hpp
index 831a2369a7e..aa81463a696 100644
--- a/src/hotspot/share/prims/jvmtiThreadState.inline.hpp
+++ b/src/hotspot/share/prims/jvmtiThreadState.inline.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -130,22 +130,21 @@ inline JvmtiThreadState* JvmtiThreadState::state_for(JavaThread *thread, Handle
   return state;
 }
 
-inline JavaThread* JvmtiThreadState::get_thread_or_saved() {
-  // Use _thread_saved if cthread is detached from JavaThread (_thread == null).
-  return (_thread == nullptr && !is_virtual()) ? _thread_saved : _thread;
-}
-
 inline void JvmtiThreadState::set_should_post_on_exceptions(bool val) {
-  get_thread_or_saved()->set_should_post_on_exceptions_flag(val ? JNI_TRUE : JNI_FALSE);
+  get_thread()->set_should_post_on_exceptions_flag(val ? JNI_TRUE : JNI_FALSE);
 }
 
 inline void JvmtiThreadState::unbind_from(JvmtiThreadState* state, JavaThread* thread) {
   if (state == nullptr) {
+    assert(!thread->is_interp_only_mode(), "sanity check");
     return;
   }
-  // Save thread's interp_only_mode.
-  state->_saved_interp_only_mode = thread->is_interp_only_mode();
-  state->set_thread(nullptr);  // Make sure stale _thread value is never used.
+  assert(thread->jvmti_thread_state() == state, "sanity check");
+  assert(state->get_thread() == thread, "sanity check");
+  assert(thread->is_interp_only_mode() == state->_saved_interp_only_mode, "sanity check");
+  if (state->is_virtual()) {    // clean _thread link for virtual threads only
+    state->set_thread(nullptr); // make sure stale _thread value is never used
+  }
 }
 
 inline void JvmtiThreadState::bind_to(JvmtiThreadState* state, JavaThread* thread) {
@@ -158,7 +157,7 @@ inline void JvmtiThreadState::bind_to(JvmtiThreadState* state, JavaThread* threa
   // Bind JavaThread to JvmtiThreadState.
   thread->set_jvmti_thread_state(state);
 
-  if (state != nullptr) {
+  if (state != nullptr && state->is_virtual()) {
     // Bind to JavaThread.
     state->set_thread(thread);
   }
diff --git a/src/hotspot/share/utilities/globalDefinitions.hpp b/src/hotspot/share/utilities/globalDefinitions.hpp
index ea4f6f99ae6..9560d863a2c 100644
--- a/src/hotspot/share/utilities/globalDefinitions.hpp
+++ b/src/hotspot/share/utilities/globalDefinitions.hpp
@@ -168,6 +168,29 @@ class oopDesc;
 #define SIZE_FORMAT_X_0          "0x%08"      PRIxPTR
 #endif  // _LP64
 
+
+template<size_t N>
+constexpr auto sizeof_auto_impl() {
+  if constexpr (N <= std::numeric_limits<uint8_t>::max()) return uint8_t(N);
+  else if constexpr (N <= std::numeric_limits<uint16_t>::max()) return uint16_t(N);
+  else if constexpr (N <= std::numeric_limits<uint32_t>::max()) return uint32_t(N);
+  else return uint64_t(N);
+}
+
+// Yields the size (in bytes) of the operand, using the smallest
+// unsigned type that can represent the size value. The operand may be
+// an expression, which is an unevaluated operand, or it may be a
+// type. All of the restrictions for sizeof operands apply to the
+// operand. The result is a constant expression.
+//
+// Example of correct usage of sizeof/sizeof_auto:
+//   // this will wrap using sizeof_auto, use sizeof to ensure computation using size_t
+//   size_t size = std::numeric_limits<uint32_t>::max() * sizeof(uint16_t);
+//   // implicit narrowing conversion or compiler warning/error using stricter compiler flags when using sizeof
+//   int count = 42 / sizeof_auto(uint16_t);
+
+#define sizeof_auto(...) sizeof_auto_impl<sizeof(__VA_ARGS__)>()
+
 // Convert pointer to intptr_t, for use in printing pointers.
 inline intptr_t p2i(const volatile void* p) {
   return (intptr_t) p;
diff --git a/src/java.base/share/classes/java/lang/runtime/ObjectMethods.java b/src/java.base/share/classes/java/lang/runtime/ObjectMethods.java
index 18aa6f29f1f..e4b2886404f 100644
--- a/src/java.base/share/classes/java/lang/runtime/ObjectMethods.java
+++ b/src/java.base/share/classes/java/lang/runtime/ObjectMethods.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -363,9 +363,9 @@ public final class ObjectMethods {
      * @return the method handle
      */
     private static MethodHandle makeToString(MethodHandles.Lookup lookup,
-                                            Class<?> receiverClass,
-                                            MethodHandle[] getters,
-                                            List<String> names) {
+                                             Class<?> receiverClass,
+                                             MethodHandle[] getters,
+                                             List<String> names) {
         assert getters.length == names.size();
         if (getters.length == 0) {
             // special case
@@ -516,8 +516,8 @@ public final class ObjectMethods {
         requireNonNull(type);
         requireNonNull(recordClass);
         requireNonNull(names);
-        requireNonNull(getters);
-        Arrays.stream(getters).forEach(Objects::requireNonNull);
+        List<MethodHandle> getterList = List.of(getters); // deep null check
+
         MethodType methodType;
         if (type instanceof MethodType mt)
             methodType = mt;
@@ -526,7 +526,14 @@ public final class ObjectMethods {
             if (!MethodHandle.class.equals(type))
                 throw new IllegalArgumentException(type.toString());
         }
-        List<MethodHandle> getterList = List.of(getters);
+
+        for (MethodHandle getter : getterList) {
+            var getterType = getter.type();
+            if (getterType.parameterCount() != 1 || getterType.returnType() == void.class || getterType.parameterType(0) != recordClass) {
+                throw new IllegalArgumentException("Illegal getter type %s for recordClass %s".formatted(getterType, recordClass.getTypeName()));
+            }
+        }
+
         MethodHandle handle = switch (methodName) {
             case "equals"   -> {
                 if (methodType != null && !methodType.equals(MethodType.methodType(boolean.class, recordClass, Object.class)))
@@ -541,7 +548,7 @@ public final class ObjectMethods {
             case "toString" -> {
                 if (methodType != null && !methodType.equals(MethodType.methodType(String.class, recordClass)))
                     throw new IllegalArgumentException("Bad method type: " + methodType);
-                List<String> nameList = "".equals(names) ? List.of() : List.of(names.split(";"));
+                List<String> nameList = names.isEmpty() ? List.of() : List.of(names.split(";"));
                 if (nameList.size() != getterList.size())
                     throw new IllegalArgumentException("Name list and accessor list do not match");
                 yield makeToString(lookup, recordClass, getters, nameList);
diff --git a/src/java.base/share/classes/java/util/zip/ZipFile.java b/src/java.base/share/classes/java/util/zip/ZipFile.java
index 43a3b37b7d0..140d76c8c91 100644
--- a/src/java.base/share/classes/java/util/zip/ZipFile.java
+++ b/src/java.base/share/classes/java/util/zip/ZipFile.java
@@ -1719,8 +1719,10 @@ public class ZipFile implements ZipConstants, Closeable {
                     this.cen = null;
                     return;         // only END header present
                 }
-                if (end.cenlen > end.endpos)
+                // Validate END header
+                if (end.cenlen > end.endpos) {
                     zerror("invalid END header (bad central directory size)");
+                }
                 long cenpos = end.endpos - end.cenlen;     // position of CEN table
                 // Get position of first local file (LOC) header, taking into
                 // account that there may be a stub prefixed to the ZIP file.
@@ -1728,18 +1730,22 @@ public class ZipFile implements ZipConstants, Closeable {
                 if (locpos < 0) {
                     zerror("invalid END header (bad central directory offset)");
                 }
-                // read in the CEN
                 if (end.cenlen > MAX_CEN_SIZE) {
                     zerror("invalid END header (central directory size too large)");
                 }
                 if (end.centot < 0 || end.centot > end.cenlen / CENHDR) {
                     zerror("invalid END header (total entries count too large)");
                 }
-                cen = this.cen = new byte[(int)end.cenlen];
-                if (readFullyAt(cen, 0, cen.length, cenpos) != end.cenlen) {
+                // Validation ensures these are <= Integer.MAX_VALUE
+                int cenlen = Math.toIntExact(end.cenlen);
+                int centot = Math.toIntExact(end.centot);
+
+                // read in the CEN
+                cen = this.cen = new byte[cenlen];
+                if (readFullyAt(cen, 0, cen.length, cenpos) != cenlen) {
                     zerror("read CEN tables failed");
                 }
-                this.total = Math.toIntExact(end.centot);
+                this.total = centot;
             } else {
                 cen = this.cen;
                 this.total = knownTotal;
diff --git a/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java b/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
index de7a5e44b91..c220455e80b 100644
--- a/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
+++ b/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -599,8 +599,8 @@ public class ArraysSupport {
         if (length > 3) {
             if (a[aFromIndex] != b[bFromIndex])
                 return 0;
-            long aOffset = Unsafe.ARRAY_CHAR_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_CHAR_INDEX_SCALE);
-            long bOffset = Unsafe.ARRAY_CHAR_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_CHAR_INDEX_SCALE);
+            long aOffset = Unsafe.ARRAY_CHAR_BASE_OFFSET + ((long) aFromIndex << LOG2_ARRAY_CHAR_INDEX_SCALE);
+            long bOffset = Unsafe.ARRAY_CHAR_BASE_OFFSET + ((long) bFromIndex << LOG2_ARRAY_CHAR_INDEX_SCALE);
             i = vectorizedMismatch(
                     a, aOffset,
                     b, bOffset,
@@ -648,8 +648,8 @@ public class ArraysSupport {
         if (length > 3) {
             if (a[aFromIndex] != b[bFromIndex])
                 return 0;
-            long aOffset = Unsafe.ARRAY_SHORT_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_SHORT_INDEX_SCALE);
-            long bOffset = Unsafe.ARRAY_SHORT_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_SHORT_INDEX_SCALE);
+            long aOffset = Unsafe.ARRAY_SHORT_BASE_OFFSET + ((long) aFromIndex << LOG2_ARRAY_SHORT_INDEX_SCALE);
+            long bOffset = Unsafe.ARRAY_SHORT_BASE_OFFSET + ((long) bFromIndex << LOG2_ARRAY_SHORT_INDEX_SCALE);
             i = vectorizedMismatch(
                     a, aOffset,
                     b, bOffset,
@@ -697,8 +697,8 @@ public class ArraysSupport {
         if (length > 1) {
             if (a[aFromIndex] != b[bFromIndex])
                 return 0;
-            long aOffset = Unsafe.ARRAY_INT_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_INT_INDEX_SCALE);
-            long bOffset = Unsafe.ARRAY_INT_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_INT_INDEX_SCALE);
+            long aOffset = Unsafe.ARRAY_INT_BASE_OFFSET + ((long) aFromIndex << LOG2_ARRAY_INT_INDEX_SCALE);
+            long bOffset = Unsafe.ARRAY_INT_BASE_OFFSET + ((long) bFromIndex << LOG2_ARRAY_INT_INDEX_SCALE);
             i = vectorizedMismatch(
                     a, aOffset,
                     b, bOffset,
@@ -729,8 +729,8 @@ public class ArraysSupport {
         int i = 0;
         if (length > 1) {
             if (Float.floatToRawIntBits(a[aFromIndex]) == Float.floatToRawIntBits(b[bFromIndex])) {
-                long aOffset = Unsafe.ARRAY_FLOAT_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_FLOAT_INDEX_SCALE);
-                long bOffset = Unsafe.ARRAY_FLOAT_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_FLOAT_INDEX_SCALE);
+                long aOffset = Unsafe.ARRAY_FLOAT_BASE_OFFSET + ((long) aFromIndex << LOG2_ARRAY_FLOAT_INDEX_SCALE);
+                long bOffset = Unsafe.ARRAY_FLOAT_BASE_OFFSET + ((long) bFromIndex << LOG2_ARRAY_FLOAT_INDEX_SCALE);
                 i = vectorizedMismatch(
                         a, aOffset,
                         b, bOffset,
@@ -787,8 +787,8 @@ public class ArraysSupport {
         }
         if (a[aFromIndex] != b[bFromIndex])
             return 0;
-        long aOffset = Unsafe.ARRAY_LONG_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_LONG_INDEX_SCALE);
-        long bOffset = Unsafe.ARRAY_LONG_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_LONG_INDEX_SCALE);
+        long aOffset = Unsafe.ARRAY_LONG_BASE_OFFSET + ((long) aFromIndex << LOG2_ARRAY_LONG_INDEX_SCALE);
+        long bOffset = Unsafe.ARRAY_LONG_BASE_OFFSET + ((long) bFromIndex << LOG2_ARRAY_LONG_INDEX_SCALE);
         int i = vectorizedMismatch(
                 a, aOffset,
                 b, bOffset,
@@ -813,8 +813,8 @@ public class ArraysSupport {
         }
         int i = 0;
         if (Double.doubleToRawLongBits(a[aFromIndex]) == Double.doubleToRawLongBits(b[bFromIndex])) {
-            long aOffset = Unsafe.ARRAY_DOUBLE_BASE_OFFSET + (aFromIndex << LOG2_ARRAY_DOUBLE_INDEX_SCALE);
-            long bOffset = Unsafe.ARRAY_DOUBLE_BASE_OFFSET + (bFromIndex << LOG2_ARRAY_DOUBLE_INDEX_SCALE);
+            long aOffset = Unsafe.ARRAY_DOUBLE_BASE_OFFSET + ((long) aFromIndex << LOG2_ARRAY_DOUBLE_INDEX_SCALE);
+            long bOffset = Unsafe.ARRAY_DOUBLE_BASE_OFFSET + ((long) bFromIndex << LOG2_ARRAY_DOUBLE_INDEX_SCALE);
             i = vectorizedMismatch(
                     a, aOffset,
                     b, bOffset,
diff --git a/src/java.base/share/classes/jdk/internal/vm/vector/VectorSupport.java b/src/java.base/share/classes/jdk/internal/vm/vector/VectorSupport.java
index 03f95222a52..23a787971c0 100644
--- a/src/java.base/share/classes/jdk/internal/vm/vector/VectorSupport.java
+++ b/src/java.base/share/classes/jdk/internal/vm/vector/VectorSupport.java
@@ -336,7 +336,7 @@ public class VectorSupport {
     @IntrinsicCandidate
     public static
     <V extends Vector<E>, E>
-    V libraryUnaryOp(long addr, Class<? extends V> vClass, Class<E> eClass, int length, String debugName,
+    V libraryUnaryOp(long addr, Class<? extends V> vClass, int laneType, int length, String debugName,
                      V v,
                      UnaryOperation<V,?> defaultImpl) {
         assert isNonCapturingLambda(defaultImpl) : defaultImpl;
@@ -374,7 +374,7 @@ public class VectorSupport {
     @IntrinsicCandidate
     public static
     <V extends VectorPayload, E>
-    V libraryBinaryOp(long addr, Class<? extends V> vClass, Class<E> eClass, int length, String debugName,
+    V libraryBinaryOp(long addr, Class<? extends V> vClass, int laneType, int length, String debugName,
                       V v1, V v2,
                       BinaryOperation<V,?> defaultImpl) {
         assert isNonCapturingLambda(defaultImpl) : defaultImpl;
diff --git a/src/java.desktop/macosx/classes/sun/font/CStrike.java b/src/java.desktop/macosx/classes/sun/font/CStrike.java
index bffb76fb1ad..f7fa00070ff 100644
--- a/src/java.desktop/macosx/classes/sun/font/CStrike.java
+++ b/src/java.desktop/macosx/classes/sun/font/CStrike.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -174,7 +174,19 @@ public final class CStrike extends PhysicalStrike {
 
     @Override
     Point2D.Float getGlyphMetrics(final int glyphCode) {
-        return new Point2D.Float(getGlyphAdvance(glyphCode), 0.0f);
+        Point2D.Float metrics = new Point2D.Float();
+        long glyphPtr = getGlyphImagePtr(glyphCode);
+        if (glyphPtr != 0L) {
+            metrics.x = StrikeCache.getGlyphXAdvance(glyphPtr);
+            metrics.y = StrikeCache.getGlyphYAdvance(glyphPtr);
+            /* advance is currently in device space, need to convert back
+             * into user space.
+             * This must not include the translation component. */
+            if (invDevTx != null) {
+                invDevTx.deltaTransform(metrics, metrics);
+            }
+        }
+        return metrics;
     }
 
     @Override
diff --git a/src/java.desktop/share/classes/java/awt/ModalEventFilter.java b/src/java.desktop/share/classes/java/awt/ModalEventFilter.java
index 7941be89743..93956c34fc5 100644
--- a/src/java.desktop/share/classes/java/awt/ModalEventFilter.java
+++ b/src/java.desktop/share/classes/java/awt/ModalEventFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,8 +26,6 @@ package java.awt;
 
 import java.awt.event.*;
 
-import sun.awt.AppContext;
-
 abstract class ModalEventFilter implements EventFilter {
 
     protected Dialog modalDialog;
@@ -129,20 +127,14 @@ abstract class ModalEventFilter implements EventFilter {
 
     private static class ToolkitModalEventFilter extends ModalEventFilter {
 
-        private AppContext appContext;
-
         ToolkitModalEventFilter(Dialog modalDialog) {
             super(modalDialog);
-            appContext = modalDialog.appContext;
         }
 
         protected FilterAction acceptWindow(Window w) {
             if (w.isModalExcluded(Dialog.ModalExclusionType.TOOLKIT_EXCLUDE)) {
                 return FilterAction.ACCEPT;
             }
-            if (w.appContext != appContext) {
-                return FilterAction.REJECT;
-            }
             while (w != null) {
                 if (w == modalDialog) {
                     return FilterAction.ACCEPT_IMMEDIATELY;
@@ -155,27 +147,21 @@ abstract class ModalEventFilter implements EventFilter {
 
     private static class ApplicationModalEventFilter extends ModalEventFilter {
 
-        private AppContext appContext;
-
         ApplicationModalEventFilter(Dialog modalDialog) {
             super(modalDialog);
-            appContext = modalDialog.appContext;
         }
 
         protected FilterAction acceptWindow(Window w) {
             if (w.isModalExcluded(Dialog.ModalExclusionType.APPLICATION_EXCLUDE)) {
                 return FilterAction.ACCEPT;
             }
-            if (w.appContext == appContext) {
-                while (w != null) {
-                    if (w == modalDialog) {
-                        return FilterAction.ACCEPT_IMMEDIATELY;
-                    }
-                    w = w.getOwner();
+            while (w != null) {
+                if (w == modalDialog) {
+                    return FilterAction.ACCEPT_IMMEDIATELY;
                 }
-                return FilterAction.REJECT;
+                w = w.getOwner();
             }
-            return FilterAction.ACCEPT;
+            return FilterAction.REJECT;
         }
     }
 
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/Chromaticity.java b/src/java.desktop/share/classes/javax/print/attribute/standard/Chromaticity.java
index 0481060f73f..25dbb7ddaca 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/Chromaticity.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/Chromaticity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -114,6 +114,7 @@ public final class Chromaticity extends EnumSyntax
     /**
      * Returns the string table for class {@code Chromaticity}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable;
     }
@@ -121,6 +122,7 @@ public final class Chromaticity extends EnumSyntax
     /**
      * Returns the enumeration value table for class {@code Chromaticity}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return myEnumValueTable;
     }
@@ -135,6 +137,7 @@ public final class Chromaticity extends EnumSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return Chromaticity.class;
     }
@@ -148,6 +151,7 @@ public final class Chromaticity extends EnumSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "chromaticity";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/ColorSupported.java b/src/java.desktop/share/classes/javax/print/attribute/standard/ColorSupported.java
index 6affb3e28dc..8ce2c5eef7c 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/ColorSupported.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/ColorSupported.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -104,6 +104,7 @@ public final class ColorSupported extends EnumSyntax
     /**
      * Returns the string table for class {@code ColorSupported}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable;
     }
@@ -111,6 +112,7 @@ public final class ColorSupported extends EnumSyntax
     /**
      * Returns the enumeration value table for class {@code ColorSupported}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return myEnumValueTable;
     }
@@ -125,6 +127,7 @@ public final class ColorSupported extends EnumSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return ColorSupported.class;
     }
@@ -138,6 +141,7 @@ public final class ColorSupported extends EnumSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "color-supported";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/Compression.java b/src/java.desktop/share/classes/javax/print/attribute/standard/Compression.java
index b1e7f1e89fc..9eeab5d9688 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/Compression.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/Compression.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -106,6 +106,7 @@ public class Compression extends EnumSyntax implements DocAttribute {
     /**
      * Returns the string table for class {@code Compression}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable.clone();
     }
@@ -113,6 +114,7 @@ public class Compression extends EnumSyntax implements DocAttribute {
     /**
      * Returns the enumeration value table for class {@code Compression}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return (EnumSyntax[])myEnumValueTable.clone();
     }
@@ -127,6 +129,7 @@ public class Compression extends EnumSyntax implements DocAttribute {
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return Compression.class;
     }
@@ -140,6 +143,7 @@ public class Compression extends EnumSyntax implements DocAttribute {
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "compression";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/Copies.java b/src/java.desktop/share/classes/javax/print/attribute/standard/Copies.java
index 33a98c035be..6292cc4c8c2 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/Copies.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/Copies.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -97,6 +97,7 @@ public final class Copies extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this copies
      *         attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return super.equals (object) && object instanceof Copies;
     }
@@ -110,6 +111,7 @@ public final class Copies extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return Copies.class;
     }
@@ -122,6 +124,7 @@ public final class Copies extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "copies";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/CopiesSupported.java b/src/java.desktop/share/classes/javax/print/attribute/standard/CopiesSupported.java
index e7b411d8e55..3c2cf4bb550 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/CopiesSupported.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/CopiesSupported.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -105,6 +105,7 @@ public final class CopiesSupported extends SetOfIntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this copies
      *         supported attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return super.equals (object) && object instanceof CopiesSupported;
     }
@@ -119,6 +120,7 @@ public final class CopiesSupported extends SetOfIntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return CopiesSupported.class;
     }
@@ -132,6 +134,7 @@ public final class CopiesSupported extends SetOfIntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "copies-supported";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCompleted.java b/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCompleted.java
index 4e0a3b27259..a7a31dacd8d 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCompleted.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCompleted.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -88,6 +88,7 @@ public final class DateTimeAtCompleted extends DateTimeSyntax
      * @return {@code true} if {@code object} is equivalent to this date-time at
      *         completed attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return(super.equals (object) &&
                object instanceof DateTimeAtCompleted);
@@ -105,6 +106,7 @@ public final class DateTimeAtCompleted extends DateTimeSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return DateTimeAtCompleted.class;
     }
@@ -118,6 +120,7 @@ public final class DateTimeAtCompleted extends DateTimeSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "date-time-at-completed";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCreation.java b/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCreation.java
index fc09f0672c2..53b85b7cf5c 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCreation.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtCreation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -88,6 +88,7 @@ public final class DateTimeAtCreation   extends DateTimeSyntax
      * @return {@code true} if {@code object} is equivalent to this date-time at
      *         creation attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return(super.equals (object) &&
                object instanceof DateTimeAtCreation);
@@ -103,6 +104,7 @@ public final class DateTimeAtCreation   extends DateTimeSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return DateTimeAtCreation.class;
     }
@@ -116,6 +118,7 @@ public final class DateTimeAtCreation   extends DateTimeSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "date-time-at-creation";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtProcessing.java b/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtProcessing.java
index 8b1f3efdc0f..310f3f756c7 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtProcessing.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/DateTimeAtProcessing.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -89,6 +89,7 @@ public final class DateTimeAtProcessing extends DateTimeSyntax
      * @return {@code true} if {@code object} is equivalent to this date-time at
      *         processing attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return(super.equals (object) &&
                object instanceof DateTimeAtProcessing);
@@ -104,6 +105,7 @@ public final class DateTimeAtProcessing extends DateTimeSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return DateTimeAtProcessing.class;
     }
@@ -117,6 +119,7 @@ public final class DateTimeAtProcessing extends DateTimeSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "date-time-at-processing";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/Destination.java b/src/java.desktop/share/classes/javax/print/attribute/standard/Destination.java
index bc1d240c9c1..655a314b136 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/Destination.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/Destination.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -89,6 +89,7 @@ public final class Destination extends URISyntax
      * @return {@code true} if {@code object} is equivalent to this destination
      *         attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals(object) &&
                 object instanceof Destination);
@@ -104,6 +105,7 @@ public final class Destination extends URISyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return Destination.class;
     }
@@ -117,6 +119,7 @@ public final class Destination extends URISyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "spool-data-destination";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/DialogOwner.java b/src/java.desktop/share/classes/javax/print/attribute/standard/DialogOwner.java
index 593e656cf6b..01a410d075b 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/DialogOwner.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/DialogOwner.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -50,6 +50,7 @@ public final class DialogOwner implements PrintRequestAttribute {
 
     private static class Accessor extends DialogOwnerAccessor {
 
+         @Override
          public long getOwnerID(DialogOwner owner) {
              return owner.getID();
          }
@@ -133,6 +134,7 @@ public final class DialogOwner implements PrintRequestAttribute {
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return DialogOwner.class;
     }
@@ -145,6 +147,7 @@ public final class DialogOwner implements PrintRequestAttribute {
      * {@code "dialog-owner"}.
      *
      */
+    @Override
     public final String getName() {
         return "dialog-owner";
 
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/DialogTypeSelection.java b/src/java.desktop/share/classes/javax/print/attribute/standard/DialogTypeSelection.java
index ae3195d0280..2cf003060b1 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/DialogTypeSelection.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/DialogTypeSelection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -98,6 +98,7 @@ public final class DialogTypeSelection extends EnumSyntax
     /**
      * Returns the string table for class {@code DialogTypeSelection}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable;
     }
@@ -106,6 +107,7 @@ public final class DialogTypeSelection extends EnumSyntax
      * Returns the enumeration value table for class
      * {@code DialogTypeSelection}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return myEnumValueTable;
     }
@@ -120,6 +122,7 @@ public final class DialogTypeSelection extends EnumSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return DialogTypeSelection.class;
     }
@@ -133,6 +136,7 @@ public final class DialogTypeSelection extends EnumSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "dialog-type-selection";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/DocumentName.java b/src/java.desktop/share/classes/javax/print/attribute/standard/DocumentName.java
index eb2bd7a870d..bd1f574e4ba 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/DocumentName.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/DocumentName.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -86,6 +86,7 @@ public final class DocumentName extends TextSyntax implements DocAttribute {
      * @return {@code true} if {@code object} is equivalent to this document
      *         name attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) && object instanceof DocumentName);
     }
@@ -100,6 +101,7 @@ public final class DocumentName extends TextSyntax implements DocAttribute {
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return DocumentName.class;
     }
@@ -113,6 +115,7 @@ public final class DocumentName extends TextSyntax implements DocAttribute {
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "document-name";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/Fidelity.java b/src/java.desktop/share/classes/javax/print/attribute/standard/Fidelity.java
index b0e4b70c87c..8c8941c76c4 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/Fidelity.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/Fidelity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -101,6 +101,7 @@ public final class Fidelity extends EnumSyntax
     /**
      * Returns the string table for class {@code Fidelity}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable;
     }
@@ -108,6 +109,7 @@ public final class Fidelity extends EnumSyntax
     /**
      * Returns the enumeration value table for class {@code Fidelity}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return myEnumValueTable;
     }
@@ -122,6 +124,7 @@ public final class Fidelity extends EnumSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return Fidelity.class;
     }
@@ -135,6 +138,7 @@ public final class Fidelity extends EnumSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "ipp-attribute-fidelity";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/Finishings.java b/src/java.desktop/share/classes/javax/print/attribute/standard/Finishings.java
index 46d520ecb48..7d9d042b3e7 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/Finishings.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/Finishings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -344,6 +344,7 @@ public class Finishings extends EnumSyntax
     /**
      * Returns the string table for class {@code Finishings}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable.clone();
     }
@@ -351,6 +352,7 @@ public class Finishings extends EnumSyntax
     /**
      * Returns the enumeration value table for class {@code Finishings}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return (EnumSyntax[])myEnumValueTable.clone();
     }
@@ -358,6 +360,7 @@ public class Finishings extends EnumSyntax
     /**
      * Returns the lowest integer value used by class {@code Finishings}.
      */
+    @Override
     protected int getOffset() {
         return 3;
     }
@@ -372,6 +375,7 @@ public class Finishings extends EnumSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return Finishings.class;
     }
@@ -385,6 +389,7 @@ public class Finishings extends EnumSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "finishings";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobHoldUntil.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobHoldUntil.java
index d4e2c2625df..2b9ede6940f 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobHoldUntil.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobHoldUntil.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -123,6 +123,7 @@ public final class JobHoldUntil extends DateTimeSyntax
      * @return {@code true} if {@code object} is equivalent to this job hold
      *         until attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals(object) && object instanceof JobHoldUntil);
     }
@@ -137,6 +138,7 @@ public final class JobHoldUntil extends DateTimeSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobHoldUntil.class;
     }
@@ -150,6 +152,7 @@ public final class JobHoldUntil extends DateTimeSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-hold-until";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressions.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressions.java
index ed9600838be..70d7c7e5e46 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressions.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressions.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -110,6 +110,7 @@ public final class JobImpressions extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job
      *         impressions attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return super.equals (object) && object instanceof JobImpressions;
     }
@@ -124,6 +125,7 @@ public final class JobImpressions extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobImpressions.class;
     }
@@ -137,6 +139,7 @@ public final class JobImpressions extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-impressions";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsCompleted.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsCompleted.java
index 4974f9e13c9..e6fdeb93d05 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsCompleted.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsCompleted.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -94,6 +94,7 @@ public final class JobImpressionsCompleted extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job
      *         impressions completed attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return(super.equals (object) &&
                object instanceof JobImpressionsCompleted);
@@ -109,6 +110,7 @@ public final class JobImpressionsCompleted extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobImpressionsCompleted.class;
     }
@@ -122,6 +124,7 @@ public final class JobImpressionsCompleted extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-impressions-completed";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsSupported.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsSupported.java
index 131b19f5ad2..82b3049b8bd 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsSupported.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobImpressionsSupported.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -94,6 +94,7 @@ public final class JobImpressionsSupported extends SetOfIntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job
      *         impressions supported attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) &&
                 object instanceof JobImpressionsSupported);
@@ -109,6 +110,7 @@ public final class JobImpressionsSupported extends SetOfIntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobImpressionsSupported.class;
     }
@@ -122,6 +124,7 @@ public final class JobImpressionsSupported extends SetOfIntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-impressions-supported";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctets.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctets.java
index 454a30a3a28..acd04fab21d 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctets.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctets.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -159,6 +159,7 @@ public final class JobKOctets   extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job K octets
      *         attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return super.equals(object) && object instanceof JobKOctets;
     }
@@ -173,6 +174,7 @@ public final class JobKOctets   extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobKOctets.class;
     }
@@ -186,6 +188,7 @@ public final class JobKOctets   extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-k-octets";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsProcessed.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsProcessed.java
index 9acc44f5777..efd9cac2441 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsProcessed.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsProcessed.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -104,6 +104,7 @@ public final class JobKOctetsProcessed extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job K octets
      *         processed attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return(super.equals (object) &&
                object instanceof JobKOctetsProcessed);
@@ -119,6 +120,7 @@ public final class JobKOctetsProcessed extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobKOctetsProcessed.class;
     }
@@ -132,6 +134,7 @@ public final class JobKOctetsProcessed extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-k-octets-processed";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsSupported.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsSupported.java
index 032d172d6e2..221328caeb8 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsSupported.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobKOctetsSupported.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -93,6 +93,7 @@ public final class JobKOctetsSupported extends SetOfIntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job K octets
      *         supported attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) &&
                 object instanceof JobKOctetsSupported);
@@ -108,6 +109,7 @@ public final class JobKOctetsSupported extends SetOfIntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobKOctetsSupported.class;
     }
@@ -121,6 +123,7 @@ public final class JobKOctetsSupported extends SetOfIntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-k-octets-supported";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheets.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheets.java
index a3720748f68..181bda79826 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheets.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheets.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -101,6 +101,7 @@ public class JobMediaSheets extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job media
      *         sheets attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return super.equals(object) && object instanceof JobMediaSheets;
     }
@@ -115,6 +116,7 @@ public class JobMediaSheets extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobMediaSheets.class;
     }
@@ -128,6 +130,7 @@ public class JobMediaSheets extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-media-sheets";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsCompleted.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsCompleted.java
index e6f1eb9b4d8..fea87dc8ebd 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsCompleted.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsCompleted.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -94,6 +94,7 @@ public final class JobMediaSheetsCompleted extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job media
      *         sheets completed attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) &&
                 object instanceof JobMediaSheetsCompleted);
@@ -109,6 +110,7 @@ public final class JobMediaSheetsCompleted extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobMediaSheetsCompleted.class;
     }
@@ -122,6 +124,7 @@ public final class JobMediaSheetsCompleted extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-media-sheets-completed";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsSupported.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsSupported.java
index a942f277175..8feeafef18a 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsSupported.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMediaSheetsSupported.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -94,6 +94,7 @@ public final class JobMediaSheetsSupported extends SetOfIntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job media
      *         sheets supported attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) &&
                 object instanceof JobMediaSheetsSupported);
@@ -109,6 +110,7 @@ public final class JobMediaSheetsSupported extends SetOfIntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobMediaSheetsSupported.class;
     }
@@ -122,6 +124,7 @@ public final class JobMediaSheetsSupported extends SetOfIntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-media-sheets-supported";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMessageFromOperator.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMessageFromOperator.java
index cd944103d23..796fe37774c 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobMessageFromOperator.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobMessageFromOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -94,6 +94,7 @@ public final class JobMessageFromOperator extends TextSyntax
      * @return {@code true} if {@code object} is equivalent to this job message
      *         from operator attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) &&
                 object instanceof JobMessageFromOperator);
@@ -109,6 +110,7 @@ public final class JobMessageFromOperator extends TextSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobMessageFromOperator.class;
     }
@@ -122,6 +124,7 @@ public final class JobMessageFromOperator extends TextSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-message-from-operator";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobName.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobName.java
index cceabd8b8f0..4fa9eaee6fd 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobName.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobName.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -92,6 +92,7 @@ public final class JobName extends TextSyntax
      * @return {@code true} if {@code object} is equivalent to this job name
      *         attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals(object) && object instanceof JobName);
     }
@@ -105,6 +106,7 @@ public final class JobName extends TextSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobName.class;
     }
@@ -117,6 +119,7 @@ public final class JobName extends TextSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-name";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobOriginatingUserName.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobOriginatingUserName.java
index d8dfd56a920..eda27d142f9 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobOriginatingUserName.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobOriginatingUserName.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -91,6 +91,7 @@ public final class JobOriginatingUserName extends TextSyntax
      * @return {@code true} if {@code object} is equivalent to this job
      *         originating user name attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) &&
                 object instanceof JobOriginatingUserName);
@@ -106,6 +107,7 @@ public final class JobOriginatingUserName extends TextSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobOriginatingUserName.class;
     }
@@ -119,6 +121,7 @@ public final class JobOriginatingUserName extends TextSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-originating-user-name";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobPriority.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobPriority.java
index 7c77a504673..5ca9990ec13 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobPriority.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobPriority.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -94,6 +94,7 @@ public final class JobPriority extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job priority
      *         attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals(Object object) {
         return (super.equals (object) && object instanceof JobPriority);
     }
@@ -108,6 +109,7 @@ public final class JobPriority extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobPriority.class;
     }
@@ -121,6 +123,7 @@ public final class JobPriority extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-priority";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobPrioritySupported.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobPrioritySupported.java
index 6df729a9813..422d823bff7 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobPrioritySupported.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobPrioritySupported.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -86,6 +86,7 @@ public final class JobPrioritySupported extends IntegerSyntax
      * @return {@code true} if {@code object} is equivalent to this job priority
      *         supported attribute, {@code false} otherwise
      */
+    @Override
     public boolean equals (Object object) {
 
         return (super.equals(object) &&
@@ -102,6 +103,7 @@ public final class JobPrioritySupported extends IntegerSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobPrioritySupported.class;
     }
@@ -115,6 +117,7 @@ public final class JobPrioritySupported extends IntegerSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-priority-supported";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobSheets.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobSheets.java
index 130b8eb27a3..59a31096d2a 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobSheets.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobSheets.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -101,6 +101,7 @@ public class JobSheets extends EnumSyntax
     /**
      * Returns the string table for class {@code JobSheets}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable.clone();
     }
@@ -108,6 +109,7 @@ public class JobSheets extends EnumSyntax
     /**
      * Returns the enumeration value table for class {@code JobSheets}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return (EnumSyntax[])myEnumValueTable.clone();
     }
@@ -122,6 +124,7 @@ public class JobSheets extends EnumSyntax
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobSheets.class;
     }
@@ -135,6 +138,7 @@ public class JobSheets extends EnumSyntax
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-sheets";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobState.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobState.java
index 13499a9b2a7..0b0ba9d3276 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobState.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobState.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -206,6 +206,7 @@ public class JobState extends EnumSyntax implements PrintJobAttribute {
     /**
      * Returns the string table for class {@code JobState}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable;
     }
@@ -213,6 +214,7 @@ public class JobState extends EnumSyntax implements PrintJobAttribute {
     /**
      * Returns the enumeration value table for class {@code JobState}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return myEnumValueTable;
     }
@@ -227,6 +229,7 @@ public class JobState extends EnumSyntax implements PrintJobAttribute {
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobState.class;
     }
@@ -240,6 +243,7 @@ public class JobState extends EnumSyntax implements PrintJobAttribute {
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-state";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReason.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReason.java
index 2f8526cb7b1..aba72ec9c1a 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReason.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReason.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -436,6 +436,7 @@ public class JobStateReason extends EnumSyntax implements Attribute {
     /**
      * Returns the string table for class {@code JobStateReason}.
      */
+    @Override
     protected String[] getStringTable() {
         return myStringTable.clone();
     }
@@ -443,6 +444,7 @@ public class JobStateReason extends EnumSyntax implements Attribute {
     /**
      * Returns the enumeration value table for class {@code JobStateReason}.
      */
+    @Override
     protected EnumSyntax[] getEnumValueTable() {
         return (EnumSyntax[])myEnumValueTable.clone();
     }
@@ -457,6 +459,7 @@ public class JobStateReason extends EnumSyntax implements Attribute {
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobStateReason.class;
     }
@@ -470,6 +473,7 @@ public class JobStateReason extends EnumSyntax implements Attribute {
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-state-reason";
     }
diff --git a/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReasons.java b/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReasons.java
index 22b438c02eb..4e3e66d0ea8 100644
--- a/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReasons.java
+++ b/src/java.desktop/share/classes/javax/print/attribute/standard/JobStateReasons.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -140,6 +140,7 @@ public final class JobStateReasons
      *         class {@link JobStateReason JobStateReason}
      * @since 1.5
      */
+    @Override
     public boolean add(JobStateReason o) {
         if (o == null) {
             throw new NullPointerException();
@@ -157,6 +158,7 @@ public final class JobStateReasons
      * @return printing attribute class (category), an instance of class
      *         {@link Class java.lang.Class}
      */
+    @Override
     public final Class<? extends Attribute> getCategory() {
         return JobStateReasons.class;
     }
@@ -170,6 +172,7 @@ public final class JobStateReasons
      *
      * @return attribute category name
      */
+    @Override
     public final String getName() {
         return "job-state-reasons";
     }
diff --git a/src/java.desktop/share/classes/javax/swing/ImageIcon.java b/src/java.desktop/share/classes/javax/swing/ImageIcon.java
index ee6c08ebb15..707a1766eee 100644
--- a/src/java.desktop/share/classes/javax/swing/ImageIcon.java
+++ b/src/java.desktop/share/classes/javax/swing/ImageIcon.java
@@ -53,8 +53,6 @@ import javax.accessibility.AccessibleRole;
 import javax.accessibility.AccessibleState;
 import javax.accessibility.AccessibleStateSet;
 
-import sun.awt.AWTAccessor;
-
 /**
  * An implementation of the Icon interface that paints Icons
  * from Images. Images that are created from a URL, filename or byte array
diff --git a/src/java.desktop/share/classes/javax/swing/JComponent.java b/src/java.desktop/share/classes/javax/swing/JComponent.java
index f515115bade..6351522ab49 100644
--- a/src/java.desktop/share/classes/javax/swing/JComponent.java
+++ b/src/java.desktop/share/classes/javax/swing/JComponent.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -4885,8 +4885,7 @@ public abstract class JComponent extends Container implements Serializable,
      * @see RepaintManager#addDirtyRegion
      */
     public void repaint(long tm, int x, int y, int width, int height) {
-        RepaintManager.currentManager(SunToolkit.targetToAppContext(this))
-                      .addDirtyRegion(this, x, y, width, height);
+        RepaintManager.currentManager(this).addDirtyRegion(this, x, y, width, height);
     }
 
 
diff --git a/src/java.desktop/share/classes/javax/swing/RepaintManager.java b/src/java.desktop/share/classes/javax/swing/RepaintManager.java
index dcc755cb4bc..db8b13afa22 100644
--- a/src/java.desktop/share/classes/javax/swing/RepaintManager.java
+++ b/src/java.desktop/share/classes/javax/swing/RepaintManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -119,8 +119,6 @@ public class RepaintManager
      */
     private PaintManager paintManager;
 
-    private static final Object repaintManagerKey = RepaintManager.class;
-
     // Whether or not a VolatileImage should be used for double-buffered painting
     static boolean volatileImageBufferEnabled = true;
     /**
@@ -236,8 +234,10 @@ public class RepaintManager
         }
     }
 
+    private static RepaintManager repaintManager;
+
     /**
-     * Return the RepaintManager for the calling thread given a Component.
+     * Return the RepaintManager given a Component.
      *
      * @param c a Component -- unused in the default implementation, but could
      *          be used by an overridden version to return a different RepaintManager
@@ -249,21 +249,15 @@ public class RepaintManager
         // component is ever used to determine the current
         // RepaintManager, DisplayChangedRunnable will need to be modified
         // accordingly.
-        return currentManager(AppContext.getAppContext());
-    }
 
-    /**
-     * Returns the RepaintManager for the specified AppContext.  If
-     * a RepaintManager has not been created for the specified
-     * AppContext this will return null.
-     */
-    static RepaintManager currentManager(AppContext appContext) {
-        RepaintManager rm = (RepaintManager)appContext.get(repaintManagerKey);
-        if (rm == null) {
-            rm = new RepaintManager(BUFFER_STRATEGY_TYPE);
-            appContext.put(repaintManagerKey, rm);
+        synchronized (RepaintManager.class) {
+            RepaintManager rm = repaintManager;
+            if (rm == null) {
+                rm = new RepaintManager(BUFFER_STRATEGY_TYPE);
+                repaintManager = rm;
+            }
+            return rm;
         }
-        return rm;
     }
 
     /**
@@ -282,16 +276,12 @@ public class RepaintManager
 
 
     /**
-     * Set the RepaintManager that should be used for the calling
-     * thread. <b>aRepaintManager</b> will become the current RepaintManager
-     * for the calling thread's thread group.
+     * Set the RepaintManager.
      * @param aRepaintManager  the RepaintManager object to use
      */
     public static void setCurrentManager(RepaintManager aRepaintManager) {
-        if (aRepaintManager != null) {
-            SwingUtilities.appContextPut(repaintManagerKey, aRepaintManager);
-        } else {
-            SwingUtilities.appContextRemove(repaintManagerKey);
+        synchronized (RepaintManager.class) {
+            repaintManager = aRepaintManager;
         }
     }
 
@@ -373,7 +363,7 @@ public class RepaintManager
 
         // Queue a Runnable to invoke paintDirtyRegions and
         // validateInvalidComponents.
-        scheduleProcessingRunnable(SunToolkit.targetToAppContext(invalidComponent));
+        scheduleProcessingRunnable();
     }
 
 
@@ -460,7 +450,7 @@ public class RepaintManager
 
         // Queue a Runnable to invoke paintDirtyRegions and
         // validateInvalidComponents.
-        scheduleProcessingRunnable(SunToolkit.targetToAppContext(c));
+        scheduleProcessingRunnable();
     }
 
     /**
@@ -530,8 +520,7 @@ public class RepaintManager
     // This is called from the toolkit thread when a native expose is
     // received.
     //
-    void nativeAddDirtyRegion(AppContext appContext, Container c,
-                              int x, int y, int w, int h) {
+    void nativeAddDirtyRegion(Container c, int x, int y, int w, int h) {
         if (w > 0 && h > 0) {
             synchronized(this) {
                 Rectangle dirty = hwDirtyComponents.get(c);
@@ -543,7 +532,7 @@ public class RepaintManager
                                               x, y, w, h, dirty));
                 }
             }
-            scheduleProcessingRunnable(appContext);
+            scheduleProcessingRunnable();
         }
     }
 
@@ -551,8 +540,7 @@ public class RepaintManager
     // This is called from the toolkit thread when awt needs to run a
     // Runnable before we paint.
     //
-    void nativeQueueSurfaceDataRunnable(AppContext appContext,
-                                        final Component c, final Runnable r)
+    void nativeQueueSurfaceDataRunnable(final Component c, final Runnable r)
     {
         synchronized(this) {
             if (runnableList == null) {
@@ -560,7 +548,7 @@ public class RepaintManager
             }
             runnableList.add(r);
         }
-        scheduleProcessingRunnable(appContext);
+        scheduleProcessingRunnable();
     }
 
     /**
@@ -1411,11 +1399,11 @@ public class RepaintManager
         return paintManager;
     }
 
-    private void scheduleProcessingRunnable(AppContext context) {
+    private void scheduleProcessingRunnable() {
         if (processingRunnable.markPending()) {
             Toolkit tk = Toolkit.getDefaultToolkit();
             if (tk instanceof SunToolkit) {
-                SunToolkit.getSystemEventQueueImplPP(context).
+                SunToolkit.getSystemEventQueueImplPP().
                   postEvent(new InvocationEvent(Toolkit.getDefaultToolkit(),
                                                 processingRunnable));
             } else {
@@ -1733,8 +1721,7 @@ public class RepaintManager
     /**
      * Listener installed to detect display changes. When display changes,
      * schedules a callback to notify all RepaintManagers of the display
-     * changes. Only one DisplayChangedHandler is ever installed. The
-     * singleton instance will schedule notification for all AppContexts.
+     * changes. Only one DisplayChangedHandler is ever installed.
      */
     private static final class DisplayChangedHandler implements
                                              DisplayChangedListener {
diff --git a/src/java.desktop/share/classes/javax/swing/SwingPaintEventDispatcher.java b/src/java.desktop/share/classes/javax/swing/SwingPaintEventDispatcher.java
index 4a7b0821a3d..8c904f7d00c 100644
--- a/src/java.desktop/share/classes/javax/swing/SwingPaintEventDispatcher.java
+++ b/src/java.desktop/share/classes/javax/swing/SwingPaintEventDispatcher.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -28,7 +28,6 @@ import java.awt.Component;
 import java.awt.Container;
 import java.awt.Rectangle;
 import java.awt.event.PaintEvent;
-import sun.awt.AppContext;
 import sun.awt.SunToolkit;
 import sun.awt.event.IgnorePaintEvent;
 
@@ -52,12 +51,10 @@ class SwingPaintEventDispatcher extends sun.awt.PaintEventDispatcher {
     public PaintEvent createPaintEvent(Component component, int x, int y,
                                          int w, int h) {
         if (component instanceof RootPaneContainer) {
-            AppContext appContext = SunToolkit.targetToAppContext(component);
-            RepaintManager rm = RepaintManager.currentManager(appContext);
+            RepaintManager rm = RepaintManager.currentManager(component);
             if (!SHOW_FROM_DOUBLE_BUFFER ||
                   !rm.show((Container)component, x, y, w, h)) {
-                rm.nativeAddDirtyRegion(appContext, (Container)component,
-                                        x, y, w, h);
+                rm.nativeAddDirtyRegion((Container)component, x, y, w, h);
             }
             // For backward compatibility generate an empty paint
             // event.  Not doing this broke parts of Netbeans.
@@ -65,10 +62,8 @@ class SwingPaintEventDispatcher extends sun.awt.PaintEventDispatcher {
                                         new Rectangle(x, y, w, h));
         }
         else if (component instanceof SwingHeavyWeight) {
-            AppContext appContext = SunToolkit.targetToAppContext(component);
-            RepaintManager rm = RepaintManager.currentManager(appContext);
-            rm.nativeAddDirtyRegion(appContext, (Container)component,
-                                    x, y, w, h);
+            RepaintManager rm = RepaintManager.currentManager(component);
+            rm.nativeAddDirtyRegion((Container)component, x, y, w, h);
             return new IgnorePaintEvent(component, PaintEvent.PAINT,
                                         new Rectangle(x, y, w, h));
         }
@@ -81,9 +76,7 @@ class SwingPaintEventDispatcher extends sun.awt.PaintEventDispatcher {
 
     public boolean queueSurfaceDataReplacing(Component c, Runnable r) {
         if (c instanceof RootPaneContainer) {
-            AppContext appContext = SunToolkit.targetToAppContext(c);
-            RepaintManager.currentManager(appContext).
-                    nativeQueueSurfaceDataRunnable(appContext, c, r);
+            RepaintManager.currentManager(c).nativeQueueSurfaceDataRunnable(c, r);
             return true;
         }
         return super.queueSurfaceDataReplacing(c, r);
diff --git a/src/java.desktop/share/classes/javax/swing/plaf/metal/MetalTitlePane.java b/src/java.desktop/share/classes/javax/swing/plaf/metal/MetalTitlePane.java
index ae8b379a579..4ed6734df1f 100644
--- a/src/java.desktop/share/classes/javax/swing/plaf/metal/MetalTitlePane.java
+++ b/src/java.desktop/share/classes/javax/swing/plaf/metal/MetalTitlePane.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -437,6 +437,7 @@ class MetalTitlePane extends JComponent {
      */
     private JMenu createMenu() {
         JMenu menu = new JMenu("");
+        menu.setPreferredSize(new Dimension(IMAGE_WIDTH, IMAGE_HEIGHT));
         if (getWindowDecorationStyle() == JRootPane.FRAME) {
             addMenuItems(menu);
         }
diff --git a/src/java.desktop/share/classes/sun/awt/SunToolkit.java b/src/java.desktop/share/classes/sun/awt/SunToolkit.java
index 10fb62e2fdc..e97b654486f 100644
--- a/src/java.desktop/share/classes/sun/awt/SunToolkit.java
+++ b/src/java.desktop/share/classes/sun/awt/SunToolkit.java
@@ -1034,8 +1034,7 @@ public abstract class SunToolkit extends Toolkit
         return getSystemEventQueueImplPP();
     }
 
-    // Package private implementation
-    static EventQueue getSystemEventQueueImplPP() {
+    public static EventQueue getSystemEventQueueImplPP() {
         return getSystemEventQueueImplPP(AppContext.getAppContext());
     }
 
diff --git a/src/java.desktop/share/classes/sun/awt/image/ImageFetcher.java b/src/java.desktop/share/classes/sun/awt/image/ImageFetcher.java
index 917378389a4..986b79edde9 100644
--- a/src/java.desktop/share/classes/sun/awt/image/ImageFetcher.java
+++ b/src/java.desktop/share/classes/sun/awt/image/ImageFetcher.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1995, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1995, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -314,10 +314,10 @@ class FetcherInfo {
     static final int MAX_NUM_FETCHERS = 4;
     static final FetcherInfo FETCHER_INFO = new FetcherInfo();
 
-    Thread[] fetchers;
+    final Thread[] fetchers;
     int numFetchers;
     int numWaiting;
-    Vector<ImageFetchable> waitList;
+    final Vector<ImageFetchable> waitList;
 
     private FetcherInfo() {
         fetchers = new Thread[MAX_NUM_FETCHERS];
diff --git a/src/java.desktop/share/classes/sun/font/GlyphLayout.java b/src/java.desktop/share/classes/sun/font/GlyphLayout.java
index df42cce344e..5bff127f143 100644
--- a/src/java.desktop/share/classes/sun/font/GlyphLayout.java
+++ b/src/java.desktop/share/classes/sun/font/GlyphLayout.java
@@ -76,7 +76,7 @@ import java.awt.geom.AffineTransform;
 import java.awt.geom.NoninvertibleTransformException;
 import java.awt.geom.Point2D;
 import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.WeakHashMap;
 
 import static java.lang.Character.*;
 
@@ -125,18 +125,12 @@ public final class GlyphLayout {
     }
 
     private static final class SDCache {
-        public Font key_font;
-        public FontRenderContext key_frc;
-
         public AffineTransform dtx;
         public AffineTransform gtx;
         public Point2D.Float delta;
         public FontStrikeDesc sd;
 
         private SDCache(Font font, FontRenderContext frc) {
-            key_font = font;
-            key_frc = frc;
-
             // !!! add getVectorTransform and hasVectorTransform to frc?  then
             // we could just skip this work...
 
@@ -177,7 +171,7 @@ public final class GlyphLayout {
         private static final Point2D.Float ZERO_DELTA = new Point2D.Float();
 
         private static
-            SoftReference<ConcurrentHashMap<SDKey, SDCache>> cacheRef;
+            SoftReference<WeakHashMap<SDKey, SDCache>> cacheRef;
 
         private static final class SDKey {
             private final Font font;
@@ -232,7 +226,7 @@ public final class GlyphLayout {
             }
 
             SDKey key = new SDKey(font, frc); // garbage, yuck...
-            ConcurrentHashMap<SDKey, SDCache> cache = null;
+            WeakHashMap<SDKey, SDCache> cache = null;
             SDCache res = null;
             if (cacheRef != null) {
                 cache = cacheRef.get();
@@ -243,13 +237,17 @@ public final class GlyphLayout {
             if (res == null) {
                 res = new SDCache(font, frc);
                 if (cache == null) {
-                    cache = new ConcurrentHashMap<SDKey, SDCache>(10);
+                    cache = new WeakHashMap<SDKey, SDCache>(10);
                     cacheRef = new
-                       SoftReference<ConcurrentHashMap<SDKey, SDCache>>(cache);
-                } else if (cache.size() >= 512) {
-                    cache.clear();
+                       SoftReference<WeakHashMap<SDKey, SDCache>>(cache);
+                } else if (cache.size() >= 128) {
+                    synchronized (SDCache.class) {
+                        cache.clear();
+                    }
+                }
+                synchronized (SDCache.class) {
+                    cache.put(key, res);
                 }
-                cache.put(key, res);
             }
             return res;
         }
diff --git a/src/java.net.http/share/classes/jdk/internal/net/http/quic/PeerConnectionId.java b/src/java.net.http/share/classes/jdk/internal/net/http/quic/PeerConnectionId.java
index 0c6f946d1a2..b822480c2a5 100644
--- a/src/java.net.http/share/classes/jdk/internal/net/http/quic/PeerConnectionId.java
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/quic/PeerConnectionId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -72,8 +72,13 @@ public final class PeerConnectionId extends QuicConnectionId {
     }
 
     private static ByteBuffer cloneBuffer(ByteBuffer src) {
+        // we make a copy of the bytes and create a new
+        // ByteBuffer here because we do not want to retain
+        // the memory that was allocated for the original
+        // ByteBuffer, which could ba a slice of a larger
+        // buffer, such as the whole datagram payload.
         final byte[] idBytes = new byte[src.remaining()];
-        src.get(idBytes);
+        src.get(src.position(), idBytes);
         return ByteBuffer.wrap(idBytes);
     }
 
diff --git a/src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java b/src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java
index edb94d5929a..41b814a551c 100644
--- a/src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java
@@ -703,7 +703,9 @@ public class QuicConnectionImpl extends QuicConnection implements QuicPacketRece
             return;
         }
         if (debug.on()) {
-            debug.log("scheduleForDecryption: %d bytes", received);
+            debug.log("scheduleForDecryption: %s bytes [idbytes: %s(%s,%s)]",
+                    received, datagram.destConnId().getClass().getSimpleName(),
+                    datagram.destConnId().position(), datagram.destConnId().limit());
         }
         endpoint.buffer(received);
         incoming.add(datagram);
@@ -1847,6 +1849,10 @@ public class QuicConnectionImpl extends QuicConnection implements QuicPacketRece
                                     header.destinationId().toHexString(),
                                     Utils.asHexString(destConnId));
                         }
+                        assert packetIndex > 1 :
+                                "first long packet CID does not match itself %s(%s,%s)"
+                                        .formatted(destConnId.getClass().getSimpleName(),
+                                                destConnId.position(), destConnId.limit());
                         return;
                     }
                     var peekedVersion = header.version();
@@ -1918,6 +1924,10 @@ public class QuicConnectionImpl extends QuicConnection implements QuicPacketRece
                                             " wrong connection id (%s vs %s)",
                                     packetIndex, Utils.asHexString(cid), Utils.asHexString(destConnId));
                         }
+                        assert packetIndex > 1 : "first short packet CID does not match itself %s(%s,%s)"
+                                        .formatted(destConnId.getClass().getSimpleName(),
+                                                destConnId.position(), destConnId.limit());
+
                         return;
                     }
 
@@ -1934,6 +1944,9 @@ public class QuicConnectionImpl extends QuicConnection implements QuicPacketRece
             if (debug.on()) {
                 debug.log("Failed to process incoming packet", t);
             }
+            if (t instanceof AssertionError) {
+                this.terminator.terminate(TerminationCause.forException(t));
+            }
         }
     }
 
diff --git a/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/DoubleVector.java b/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/DoubleVector.java
index 519122b4d28..5e7c97dc56d 100644
--- a/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/DoubleVector.java
+++ b/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/DoubleVector.java
@@ -724,7 +724,7 @@ public abstract class DoubleVector extends AbstractVector<Double> {
     @ForceInline
     final
     DoubleVector unaryMathOp(VectorOperators.Unary op) {
-        return VectorMathLibrary.unaryMathOp(op, opCode(op), species(), DoubleVector::unaryOperations,
+        return VectorMathLibrary.unaryMathOp(op, opCode(op), vspecies(), DoubleVector::unaryOperations,
                                              this);
     }
 
@@ -851,7 +851,7 @@ public abstract class DoubleVector extends AbstractVector<Double> {
     @ForceInline
     final
     DoubleVector binaryMathOp(VectorOperators.Binary op, DoubleVector that) {
-        return VectorMathLibrary.binaryMathOp(op, opCode(op), species(), DoubleVector::binaryOperations,
+        return VectorMathLibrary.binaryMathOp(op, opCode(op), vspecies(), DoubleVector::binaryOperations,
                                               this, that);
     }
 
diff --git a/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/FloatVector.java b/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/FloatVector.java
index 9950abf696d..5862a295fa3 100644
--- a/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/FloatVector.java
+++ b/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/FloatVector.java
@@ -724,7 +724,7 @@ public abstract class FloatVector extends AbstractVector<Float> {
     @ForceInline
     final
     FloatVector unaryMathOp(VectorOperators.Unary op) {
-        return VectorMathLibrary.unaryMathOp(op, opCode(op), species(), FloatVector::unaryOperations,
+        return VectorMathLibrary.unaryMathOp(op, opCode(op), vspecies(), FloatVector::unaryOperations,
                                              this);
     }
 
@@ -851,7 +851,7 @@ public abstract class FloatVector extends AbstractVector<Float> {
     @ForceInline
     final
     FloatVector binaryMathOp(VectorOperators.Binary op, FloatVector that) {
-        return VectorMathLibrary.binaryMathOp(op, opCode(op), species(), FloatVector::binaryOperations,
+        return VectorMathLibrary.binaryMathOp(op, opCode(op), vspecies(), FloatVector::binaryOperations,
                                               this, that);
     }
 
diff --git a/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/VectorMathLibrary.java b/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/VectorMathLibrary.java
index 4898cb70884..1c1cfcc78c7 100644
--- a/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/VectorMathLibrary.java
+++ b/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/VectorMathLibrary.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2025, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -283,7 +283,7 @@ import static jdk.internal.vm.vector.Utils.debug;
     @ForceInline
     /*package-private*/ static
     <E, V extends Vector<E>>
-    V unaryMathOp(Unary op, int opc, VectorSpecies<E> vspecies,
+    V unaryMathOp(Unary op, int opc, AbstractSpecies<E> vspecies,
                   IntFunction<VectorSupport.UnaryOperation<V,?>> implSupplier,
                   V v) {
         var entry = lookup(op, opc, vspecies, implSupplier);
@@ -293,7 +293,7 @@ import static jdk.internal.vm.vector.Utils.debug;
             @SuppressWarnings({"unchecked"})
             Class<V> vt = (Class<V>)vspecies.vectorType();
             return VectorSupport.libraryUnaryOp(
-                    entry.entry.address(), vt, vspecies.elementType(), vspecies.length(), entry.name,
+                    entry.entry.address(), vt, vspecies.laneTypeOrdinal(), vspecies.length(), entry.name,
                     v,
                     entry.impl);
         } else {
@@ -304,7 +304,7 @@ import static jdk.internal.vm.vector.Utils.debug;
     @ForceInline
     /*package-private*/ static
     <E, V extends Vector<E>>
-    V binaryMathOp(Binary op, int opc, VectorSpecies<E> vspecies,
+    V binaryMathOp(Binary op, int opc, AbstractSpecies<E> vspecies,
                    IntFunction<VectorSupport.BinaryOperation<V,?>> implSupplier,
                    V v1, V v2) {
         var entry = lookup(op, opc, vspecies, implSupplier);
@@ -314,7 +314,7 @@ import static jdk.internal.vm.vector.Utils.debug;
             @SuppressWarnings({"unchecked"})
             Class<V> vt = (Class<V>)vspecies.vectorType();
             return VectorSupport.libraryBinaryOp(
-                    entry.entry.address(), vt, vspecies.elementType(), vspecies.length(), entry.name,
+                    entry.entry.address(), vt, vspecies.laneTypeOrdinal(), vspecies.length(), entry.name,
                     v1, v2,
                     entry.impl);
         } else {
diff --git a/src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java b/src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java
index b3db11eb1fe..3223ff9dccd 100644
--- a/src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java
+++ b/src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java
@@ -105,6 +105,9 @@ class ZipFileSystem extends FileSystem {
     private static final String COMPRESSION_METHOD_DEFLATED = "DEFLATED";
     // Value specified for compressionMethod property to not compress Zip entries
     private static final String COMPRESSION_METHOD_STORED = "STORED";
+    // CEN size is limited to the maximum array size in the JDK
+    // See ArraysSupport.SOFT_MAX_ARRAY_LENGTH;
+    private static final int MAX_CEN_SIZE = Integer.MAX_VALUE - 8;
 
     private final ZipFileSystemProvider provider;
     private final Path zfpath;
@@ -1353,7 +1356,7 @@ class ZipFileSystem extends FileSystem {
                     // to use the end64 values
                     end.cenlen = cenlen64;
                     end.cenoff = cenoff64;
-                    end.centot = (int)centot64; // assume total < 2g
+                    end.centot = centot64;
                     end.endpos = end64pos;
                     return end;
                 }
@@ -1575,23 +1578,34 @@ class ZipFileSystem extends FileSystem {
             buildNodeTree();
             return null;         // only END header present
         }
-        if (end.cenlen > end.endpos)
-            throw new ZipException("invalid END header (bad central directory size)");
+        // Validate END header
+        if (end.cenlen > end.endpos) {
+            zerror("invalid END header (bad central directory size)");
+        }
         long cenpos = end.endpos - end.cenlen;     // position of CEN table
-
         // Get position of first local file (LOC) header, taking into
-        // account that there may be a stub prefixed to the zip file.
+        // account that there may be a stub prefixed to the ZIP file.
         locpos = cenpos - end.cenoff;
-        if (locpos < 0)
-            throw new ZipException("invalid END header (bad central directory offset)");
+        if (locpos < 0) {
+            zerror("invalid END header (bad central directory offset)");
+        }
+        if (end.cenlen > MAX_CEN_SIZE) {
+            zerror("invalid END header (central directory size too large)");
+        }
+        if (end.centot < 0 || end.centot > end.cenlen / CENHDR) {
+            zerror("invalid END header (total entries count too large)");
+        }
+        // Validation ensures these are <= Integer.MAX_VALUE
+        int cenlen = Math.toIntExact(end.cenlen);
+        int centot = Math.toIntExact(end.centot);
 
         // read in the CEN
-        byte[] cen = new byte[(int)(end.cenlen)];
-        if (readNBytesAt(cen, 0, cen.length, cenpos) != end.cenlen) {
-            throw new ZipException("read CEN tables failed");
+        byte[] cen = new byte[cenlen];
+        if (readNBytesAt(cen, 0, cen.length, cenpos) != cenlen) {
+            zerror("read CEN tables failed");
         }
         // Iterate through the entries in the central directory
-        inodes = LinkedHashMap.newLinkedHashMap(end.centot + 1);
+        inodes = LinkedHashMap.newLinkedHashMap(centot + 1);
         int pos = 0;
         int limit = cen.length;
         while (pos < limit) {
@@ -2666,7 +2680,7 @@ class ZipFileSystem extends FileSystem {
         // int  disknum;
         // int  sdisknum;
         // int  endsub;
-        int  centot;        // 4 bytes
+        long centot;        // 4 bytes
         long cenlen;        // 4 bytes
         long cenoff;        // 4 bytes
         // int  comlen;     // comment length
@@ -2689,7 +2703,7 @@ class ZipFileSystem extends FileSystem {
                 xoff = ZIP64_MINVAL;
                 hasZip64 = true;
             }
-            int count = centot;
+            int count = Math.toIntExact(centot);
             if (count >= ZIP64_MINVAL32) {
                 count = ZIP64_MINVAL32;
                 hasZip64 = true;
diff --git a/test/hotspot/gtest/utilities/test_globalDefinitions.cpp b/test/hotspot/gtest/utilities/test_globalDefinitions.cpp
index f24d74ea529..6636efbba8e 100644
--- a/test/hotspot/gtest/utilities/test_globalDefinitions.cpp
+++ b/test/hotspot/gtest/utilities/test_globalDefinitions.cpp
@@ -321,3 +321,38 @@ TEST(globalDefinitions, jlong_from) {
   val = jlong_from(0xABCD, 0xEFEF);
   EXPECT_EQ(val, CONST64(0x0000ABCD0000EFEF));
 }
+
+struct NoCopy {
+  int x;
+  NONCOPYABLE(NoCopy);
+};
+
+TEST(globalDefinitions, sizeof_auto) {
+  char x = 5;
+  char& y = x;
+  char* z = &x;
+  EXPECT_EQ(sizeof_auto(x), sizeof(x));
+  EXPECT_EQ(sizeof_auto(y), sizeof(y));
+  EXPECT_EQ(sizeof_auto(z), sizeof(z));
+
+  NoCopy nc{0};
+  sizeof_auto(nc);
+
+  static_assert(sizeof_auto(char[1LL])  == 1);
+  static_assert(sizeof_auto(char[std::numeric_limits<uint8_t>::max()  + 1LL]) == std::numeric_limits<uint8_t>::max()  + 1LL);
+  static_assert(sizeof_auto(char[std::numeric_limits<uint16_t>::max() + 1LL]) == std::numeric_limits<uint16_t>::max() + 1LL);
+#if defined(_LP64) && !defined(_WINDOWS)
+  // char array sometimes limited to 2 gig length on 32 bit platforms (signed), disabled for Windows because of compiler error C2148.
+  static_assert(sizeof_auto(char[std::numeric_limits<uint32_t>::max() + 1LL]) == std::numeric_limits<uint32_t>::max() + 1LL);
+#endif
+
+  static_assert(sizeof(sizeof_auto(char[std::numeric_limits<uint8_t>::max()]))        == sizeof(uint8_t));
+  static_assert(sizeof(sizeof_auto(char[std::numeric_limits<uint8_t>::max() + 1LL]))  == sizeof(uint16_t));
+  static_assert(sizeof(sizeof_auto(char[std::numeric_limits<uint16_t>::max()]))       == sizeof(uint16_t));
+  static_assert(sizeof(sizeof_auto(char[std::numeric_limits<uint16_t>::max() + 1LL])) == sizeof(uint32_t));
+#if defined(_LP64) && !defined(_WINDOWS)
+  // char array sometimes limited to 2 gig length on 32 bit platforms (signed), disabled for Windows because of compiler error C2148.
+  static_assert(sizeof(sizeof_auto(char[std::numeric_limits<uint32_t>::max()]))       == sizeof(uint32_t));
+  static_assert(sizeof(sizeof_auto(char[std::numeric_limits<uint32_t>::max() + 1LL])) == sizeof(uint64_t));
+#endif
+}
diff --git a/test/hotspot/jtreg/compiler/c2/TestDependsOnTestSqrtHFAssertion.java b/test/hotspot/jtreg/compiler/c2/TestDependsOnTestSqrtHFAssertion.java
new file mode 100644
index 00000000000..5ad9a927097
--- /dev/null
+++ b/test/hotspot/jtreg/compiler/c2/TestDependsOnTestSqrtHFAssertion.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8378897
+ * @summary assertion failure due to missing depends_only_on_test_impl definition in SqrtHFNode
+ * @library /test/lib /
+ * @modules jdk.incubator.vector
+ * @requires vm.debug & vm.compiler2.enabled
+ * @run main/othervm --add-modules=jdk.incubator.vector compiler.c2.TestDependsOnTestSqrtHFAssertion
+ */
+
+package compiler.c2;
+
+import jdk.incubator.vector.*;
+
+public class TestDependsOnTestSqrtHFAssertion {
+    public static int x1 = 10;
+
+    public static int x2 = 20;
+
+    public static int y = 30;
+
+    public static int micro(int x1, int x2, int y, int ctr) {
+        int res = 0;
+        for (int i = 0; i < ctr; i++) {
+            if (y != 0) {
+                if (x1 > 0) {
+                    if (x2 > 0) {
+                        if (y != 0) {
+                            res += (int)Float16.float16ToRawShortBits(Float16.sqrt(Float16.shortBitsToFloat16((short)(x1/y))));
+                            res += (int)Float16.float16ToRawShortBits(Float16.sqrt(Float16.shortBitsToFloat16((short)(x2/y))));
+                        }
+                    }
+                }
+           }
+        }
+        return res;
+    }
+
+    public static void main(String [] args) {
+        int res = 0;
+        for (int i = 0 ; i < 100000; i++) {
+            res += micro(x1, x2, y, i);
+        }
+        IO.println("PASS" + res);
+    }
+}
diff --git a/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java b/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
index c31ce198644..3508c06ad0a 100644
--- a/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+++ b/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
@@ -1488,6 +1488,12 @@ public class IRNode {
         beforeMatchingNameRegex(VECTOR_MASK_FIRST_TRUE, "VectorMaskFirstTrue");
     }
 
+    // Can only be used if libjsvml or libsleef is available
+    public static final String CALL_LEAF_VECTOR = PREFIX + "CALL_LEAF_VECTOR" + POSTFIX;
+    static {
+        beforeMatchingNameRegex(CALL_LEAF_VECTOR, "CallLeafVector");
+    }
+
     // Can only be used if avx512_vnni is available.
     public static final String MUL_ADD_VS2VI_VNNI = PREFIX + "MUL_ADD_VS2VI_VNNI" + POSTFIX;
     static {
diff --git a/test/hotspot/jtreg/compiler/loopopts/superword/TestCompatibleUseDefTypeSize.java b/test/hotspot/jtreg/compiler/loopopts/superword/TestCompatibleUseDefTypeSize.java
index 7399a1ec411..873533aaba8 100644
--- a/test/hotspot/jtreg/compiler/loopopts/superword/TestCompatibleUseDefTypeSize.java
+++ b/test/hotspot/jtreg/compiler/loopopts/superword/TestCompatibleUseDefTypeSize.java
@@ -514,7 +514,7 @@ public class TestCompatibleUseDefTypeSize {
     // Narrowing
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_I2S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", ">0" })
     public Object[] testIntToShort(int[] ints, short[] res) {
@@ -527,7 +527,7 @@ public class TestCompatibleUseDefTypeSize {
 
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_I2S, IRNode.VECTOR_SIZE + "min(max_int, max_char)", ">0" })
     public Object[] testIntToChar(int[] ints, char[] res) {
@@ -539,7 +539,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_I2B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", ">0" })
     public Object[] testIntToByte(int[] ints, byte[] res) {
@@ -551,7 +551,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_S2B, IRNode.VECTOR_SIZE + "min(max_short, max_byte)", ">0" })
     public Object[] testShortToByte(short[] shorts, byte[] res) {
@@ -575,7 +575,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_L2S, IRNode.VECTOR_SIZE + "min(max_long, max_short)", ">0" })
     public Object[] testLongToShort(long[] longs, short[] res) {
@@ -587,7 +587,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_L2S, IRNode.VECTOR_SIZE + "min(max_long, max_char)", ">0" })
     public Object[] testLongToChar(long[] longs, char[] res) {
@@ -599,7 +599,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_L2I, IRNode.VECTOR_SIZE + "min(max_long, max_int)", ">0" })
     public Object[] testLongToInt(long[] longs, int[] res) {
@@ -611,7 +611,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.STORE_VECTOR, ">0" })
     public Object[] testShortToChar(short[] shorts, char[] res) {
@@ -625,7 +625,7 @@ public class TestCompatibleUseDefTypeSize {
     // Widening
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_S2I, IRNode.VECTOR_SIZE + "min(max_short, max_int)", ">0" })
     public Object[] testShortToInt(short[] shorts, int[] res) {
@@ -637,7 +637,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_B2I, IRNode.VECTOR_SIZE + "min(max_byte, max_int)", ">0" })
     public Object[] testByteToInt(byte[] bytes, int[] res) {
@@ -649,7 +649,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_B2S, IRNode.VECTOR_SIZE + "min(max_byte, max_short)", ">0" })
     public Object[] testByteToShort(byte[] bytes, short[] res) {
@@ -661,7 +661,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_B2S, IRNode.VECTOR_SIZE + "min(max_byte, max_char)", ">0" })
     public Object[] testByteToChar(byte[] bytes, char[] res) {
@@ -685,7 +685,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_S2L, IRNode.VECTOR_SIZE + "min(max_short, max_long)", ">0" })
     public Object[] testShortToLong(short[] shorts, long[] res) {
@@ -697,7 +697,7 @@ public class TestCompatibleUseDefTypeSize {
     }
 
     @Test
-    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true" },
+    @IR(applyIfCPUFeatureOr = { "avx", "true", "asimd", "true", "rvv", "true" },
         applyIfOr = {"AlignVector", "false", "UseCompactObjectHeaders", "false"},
         counts = { IRNode.VECTOR_CAST_I2L, IRNode.VECTOR_SIZE + "min(max_int, max_long)", ">0" })
     public Object[] testIntToLong(int[] ints, long[] res) {
diff --git a/test/hotspot/jtreg/compiler/loopopts/superword/TestReductions.java b/test/hotspot/jtreg/compiler/loopopts/superword/TestReductions.java
index e0f44bcdb3b..9d674950499 100644
--- a/test/hotspot/jtreg/compiler/loopopts/superword/TestReductions.java
+++ b/test/hotspot/jtreg/compiler/loopopts/superword/TestReductions.java
@@ -458,7 +458,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.AND_REDUCTION_V, "> 0",
                   IRNode.AND_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -475,7 +475,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.OR_REDUCTION_V, "> 0",
                   IRNode.OR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -492,7 +492,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.XOR_REDUCTION_V, "> 0",
                   IRNode.XOR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -531,7 +531,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.MIN_REDUCTION_V, "> 0",
                   IRNode.MIN_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -548,7 +548,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.MAX_REDUCTION_V, "> 0",
                   IRNode.MAX_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -566,7 +566,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.AND_REDUCTION_V, "> 0",
                   IRNode.AND_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -583,7 +583,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.OR_REDUCTION_V, "> 0",
                   IRNode.OR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -600,7 +600,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.XOR_REDUCTION_V, "> 0",
                   IRNode.XOR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -639,7 +639,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.MIN_REDUCTION_V, "> 0",
                   IRNode.MIN_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -656,7 +656,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.MAX_REDUCTION_V, "> 0",
                   IRNode.MAX_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -674,7 +674,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.AND_REDUCTION_V, "> 0",
                   IRNode.AND_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -691,7 +691,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.OR_REDUCTION_V, "> 0",
                   IRNode.OR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -708,7 +708,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.XOR_REDUCTION_V, "> 0",
                   IRNode.XOR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -747,7 +747,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.MIN_REDUCTION_V, "> 0",
                   IRNode.MIN_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -764,7 +764,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0",
                   IRNode.MAX_REDUCTION_V, "> 0",
                   IRNode.MAX_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_B,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1016,7 +1016,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.AND_REDUCTION_V, "> 0",
                   IRNode.AND_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1033,7 +1033,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.OR_REDUCTION_V, "> 0",
                   IRNode.OR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1050,7 +1050,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.XOR_REDUCTION_V, "> 0",
                   IRNode.XOR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1089,7 +1089,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.MIN_REDUCTION_V, "> 0",
                   IRNode.MIN_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1106,7 +1106,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.MAX_REDUCTION_V, "> 0",
                   IRNode.MAX_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1124,7 +1124,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.AND_REDUCTION_V, "> 0",
                   IRNode.AND_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1141,7 +1141,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.OR_REDUCTION_V, "> 0",
                   IRNode.OR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1158,7 +1158,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.XOR_REDUCTION_V, "> 0",
                   IRNode.XOR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1197,7 +1197,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.MIN_REDUCTION_V, "> 0",
                   IRNode.MIN_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1214,7 +1214,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.MAX_REDUCTION_V, "> 0",
                   IRNode.MAX_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1232,7 +1232,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.AND_REDUCTION_V, "> 0",
                   IRNode.AND_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1249,7 +1249,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.OR_REDUCTION_V, "> 0",
                   IRNode.OR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1266,7 +1266,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.XOR_REDUCTION_V, "> 0",
                   IRNode.XOR_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1305,7 +1305,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.MIN_REDUCTION_V, "> 0",
                   IRNode.MIN_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
@@ -1322,7 +1322,7 @@ public class TestReductions {
     @IR(counts = {IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0",
                   IRNode.MAX_REDUCTION_V, "> 0",
                   IRNode.MAX_VI,          "> 0"},
-        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true"},
+        applyIfCPUFeatureOr = {"avx", "true", "asimd", "true", "rvv", "true"},
         applyIf = {"AutoVectorizationOverrideProfitability", "> 0"})
     @IR(failOn = IRNode.LOAD_VECTOR_S,
         applyIf = {"AutoVectorizationOverrideProfitability", "= 0"})
diff --git a/test/hotspot/jtreg/compiler/vectorapi/TestVectorLibraryUnaryOpAndBinaryOp.java b/test/hotspot/jtreg/compiler/vectorapi/TestVectorLibraryUnaryOpAndBinaryOp.java
new file mode 100644
index 00000000000..f7837e1abfa
--- /dev/null
+++ b/test/hotspot/jtreg/compiler/vectorapi/TestVectorLibraryUnaryOpAndBinaryOp.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2026, NTT DATA
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package compiler.vectorapi;
+
+import compiler.lib.ir_framework.*;
+import jdk.incubator.vector.*;
+
+/**
+ * @test
+ * @bug 8378312
+ * @library /test/lib /
+ * @summary VectorAPI: libraryUnaryOp and libraryBinaryOp should be intrinsified.
+ * @modules jdk.incubator.vector
+ *
+ * @run driver compiler.vectorapi.TestVectorLibraryUnaryOpAndBinaryOp
+ */
+
+public class TestVectorLibraryUnaryOpAndBinaryOp {
+
+    @Test
+    @IR(counts = { IRNode.CALL_LEAF_VECTOR, "= 1" }, applyIfCPUFeatureOr = { "asimd", "true", "avx", "true" })
+    public static void testUnary() {
+        var vec = FloatVector.broadcast(FloatVector.SPECIES_128, 3.14f);
+        vec.lanewise(VectorOperators.COS);
+    }
+
+    @Test
+    @IR(counts = { IRNode.CALL_LEAF_VECTOR, "= 1" }, applyIfCPUFeatureOr = { "asimd", "true", "avx", "true" })
+    public static void testBinary() {
+        var vec = FloatVector.broadcast(FloatVector.SPECIES_128, 2.0f);
+        vec.lanewise(VectorOperators.HYPOT, 1.0f);
+    }
+
+    public static void main(String[] args) {
+        TestFramework testFramework = new TestFramework();
+        testFramework.addFlags("--add-modules=jdk.incubator.vector")
+                     .start();
+    }
+
+}
diff --git a/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java b/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java
index 29331cc1845..2f6296e41d2 100644
--- a/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java
+++ b/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java
@@ -74,7 +74,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupShortArray")
     public Object[] testShortLeadingZeros(short[] in) {
         short[] res = new short[SIZE];
@@ -100,7 +100,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupShortArray")
     public Object[] testShortTrailingZeros(short[] in) {
         short[] res = new short[SIZE];
@@ -126,7 +126,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupShortArray")
     public Object[] testShortReverse(short[] in) {
         short[] res = new short[SIZE];
@@ -152,7 +152,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_S, IRNode.VECTOR_SIZE + "min(max_int, max_short)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupShortArray")
     public Object[] testShortBitCount(short[] in) {
         short[] res = new short[SIZE];
@@ -282,7 +282,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupByteArray")
     public Object[] testByteLeadingZeros(byte[] in) {
         byte[] res = new byte[SIZE];
@@ -308,7 +308,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupByteArray")
     public Object[] testByteTrailingZeros(byte[] in) {
         byte[] res = new byte[SIZE];
@@ -334,7 +334,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupByteArray")
     public Object[] testByteReverse(byte[] in) {
         byte[] res = new byte[SIZE];
@@ -411,7 +411,7 @@ public class TestSubwordTruncation {
 
     @Test
     @IR(counts = { IRNode.LOAD_VECTOR_B, IRNode.VECTOR_SIZE + "min(max_int, max_byte)", "> 0" },
-        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true" })
+        applyIfCPUFeatureOr = { "avx2", "true", "asimd", "true", "zvbb", "true" })
     @Arguments(setup = "setupByteArray")
     public Object[] testByteBitCount(byte[] in) {
         byte[] res = new byte[SIZE];
diff --git a/test/hotspot/jtreg/runtime/cds/appcds/TestZGCWithCDS.java b/test/hotspot/jtreg/runtime/cds/appcds/TestZGCWithCDS.java
index 7c0b5896a98..eb42bb9f93d 100644
--- a/test/hotspot/jtreg/runtime/cds/appcds/TestZGCWithCDS.java
+++ b/test/hotspot/jtreg/runtime/cds/appcds/TestZGCWithCDS.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -22,7 +22,7 @@
  */
 
 /*
- * @test
+ * @test id=COH
  * @bug 8232069
  * @requires vm.cds
  * @requires vm.bits == 64
@@ -31,7 +31,32 @@
  * @requires vm.gc == null
  * @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds
  * @compile test-classes/Hello.java
- * @run driver TestZGCWithCDS
+ * @comment Only run if COH is unset or enabled.
+ * @requires vm.opt.UseCompactObjectHeaders != "false"
+ * @comment Driver sets compressed oops/class pointers, jtreg overrides will cause problems.
+            Only run the test if the flags are not set via the command line.
+ * @requires vm.opt.UseCompressedOops == null
+ * @requires vm.opt.UseCompressedClassPointers == null
+ * @run driver TestZGCWithCDS true
+ */
+
+/*
+ * @test id=NO-COH
+ * @bug 8232069
+ * @requires vm.cds
+ * @requires vm.bits == 64
+ * @requires vm.gc.Z
+ * @requires vm.gc.Serial
+ * @requires vm.gc == null
+ * @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds
+ * @compile test-classes/Hello.java
+ * @comment Only run if COH is unset or disabled.
+ * @requires vm.opt.UseCompactObjectHeaders != "true"
+ * @comment Driver sets compressed oops/class pointers, jtreg overrides will cause problems.
+            Only run the test if the flags are not set via the command line.
+ * @requires vm.opt.UseCompressedOops == null
+ * @requires vm.opt.UseCompressedClassPointers == null
+ * @run driver TestZGCWithCDS false
  */
 
 import jdk.test.lib.Platform;
@@ -42,7 +67,8 @@ public class TestZGCWithCDS {
     public final static String UNABLE_TO_USE_ARCHIVE = "Unable to use shared archive.";
     public final static String ERR_MSG = "The saved state of UseCompressedOops and UseCompressedClassPointers is different from runtime, CDS will be disabled.";
     public static void main(String... args) throws Exception {
-         String compactHeaders = "-XX:+UseCompactObjectHeaders";
+         boolean compactHeadersOn = Boolean.valueOf(args[0]);
+         String compactHeaders = "-XX:" + (compactHeadersOn ? "+" : "-") + "UseCompactObjectHeaders";
          String helloJar = JarBuilder.build("hello", "Hello");
          System.out.println("0. Dump with ZGC");
          OutputAnalyzer out = TestCommon
diff --git a/test/hotspot/jtreg/runtime/cds/appcds/resolvedConstants/AOTLinkedVarHandles.java b/test/hotspot/jtreg/runtime/cds/appcds/resolvedConstants/AOTLinkedVarHandles.java
index 4586b94b519..1089e849a90 100644
--- a/test/hotspot/jtreg/runtime/cds/appcds/resolvedConstants/AOTLinkedVarHandles.java
+++ b/test/hotspot/jtreg/runtime/cds/appcds/resolvedConstants/AOTLinkedVarHandles.java
@@ -64,6 +64,7 @@ public class AOTLinkedVarHandles {
         OutputAnalyzer dumpOut = CDSTestUtils.createArchiveAndCheck(opts);
         dumpOut.shouldMatch(s + "java/lang/invoke/VarHandle.compareAndExchangeAcquire:\\(\\[DIDI\\)D =>");
         dumpOut.shouldMatch(s + "java/lang/invoke/VarHandle.get:\\(\\[DI\\)D => ");
+        dumpOut.shouldNotContain("rejected .* CP entry.*");
 
         CDSOptions runOpts = (new CDSOptions())
             .setUseVersion(false)
diff --git a/test/jdk/java/awt/Dialog/CloseDialog/CloseDialogTest.java b/test/jdk/java/awt/Dialog/CloseDialog/CloseDialogTest.java
deleted file mode 100644
index 1201e5c835c..00000000000
--- a/test/jdk/java/awt/Dialog/CloseDialog/CloseDialogTest.java
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- * Copyright (c) 2014, 2025, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-import java.awt.Dialog;
-import java.awt.Frame;
-import java.io.*;
-import javax.swing.*;
-import sun.awt.SunToolkit;
-import java.util.concurrent.atomic.AtomicReference;
-
-/**
- * @test
- * @key headful
- * @bug 8043705
- * @summary Can't exit color chooser dialog when running in non-default AppContext
- * @modules java.desktop/sun.awt
- * @run main CloseDialogTest
- */
-
-public class CloseDialogTest {
-
-    private static volatile Frame frame;
-    private static volatile Dialog dialog;
-    private static volatile InputStream testErrorStream;
-    private static final PrintStream systemErrStream = System.err;
-    private static final AtomicReference<Exception> caughtException
-            = new AtomicReference<>();
-
-    public static void main(String[] args) throws Exception {
-
-        // redirect System err
-        PipedOutputStream errorOutputStream = new PipedOutputStream();
-        testErrorStream = new PipedInputStream(errorOutputStream);
-        System.setErr(new PrintStream(errorOutputStream));
-
-        ThreadGroup swingTG = new ThreadGroup(getRootThreadGroup(), "SwingTG");
-        try {
-            new Thread(swingTG, () -> {
-                SunToolkit.createNewAppContext();
-                SwingUtilities.invokeLater(() -> {
-                    frame = new Frame();
-                    frame.setSize(300, 300);
-                    frame.setVisible(true);
-
-                    dialog = new Dialog(frame);
-                    dialog.setSize(200, 200);
-                    dialog.setModal(true);
-                    dialog.setVisible(true);
-                });
-            }).start();
-
-            Thread.sleep(400);
-
-            Thread disposeThread = new Thread(swingTG, () ->
-                    SwingUtilities.invokeLater(() -> {
-                try {
-                    while (dialog == null || !dialog.isVisible()) {
-                        Thread.sleep(100);
-                    }
-                    dialog.setVisible(false);
-                    dialog.dispose();
-                    frame.dispose();
-                } catch (Exception e) {
-                    caughtException.set(e);
-                }
-            }));
-            disposeThread.start();
-            disposeThread.join();
-            Thread.sleep(500);
-
-            // read System err
-            final char[] buffer = new char[2048];
-            System.err.print("END");
-            System.setErr(systemErrStream);
-            try (Reader in = new InputStreamReader(testErrorStream, "UTF-8")) {
-                int size = in.read(buffer, 0, buffer.length);
-                String errorString = new String(buffer, 0, size);
-                if (!errorString.startsWith("END")) {
-                    System.err.println(errorString.
-                            substring(0, errorString.length() - 4));
-                    throw new RuntimeException("Error output is not empty!");
-                }
-            }
-        } finally {
-            if (caughtException.get() != null) {
-                throw new RuntimeException("Failed. Caught exception!",
-                        caughtException.get());
-            }
-        }
-    }
-
-    private static ThreadGroup getRootThreadGroup() {
-        ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
-        while (threadGroup.getParent() != null) {
-            threadGroup = threadGroup.getParent();
-        }
-        return threadGroup;
-    }
-}
diff --git a/test/jdk/java/awt/Toolkit/DisplayChangesException/DisplayChangesException.java b/test/jdk/java/awt/Toolkit/DisplayChangesException/DisplayChangesException.java
deleted file mode 100644
index 0f13265ac58..00000000000
--- a/test/jdk/java/awt/Toolkit/DisplayChangesException/DisplayChangesException.java
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-import java.awt.EventQueue;
-import java.awt.GraphicsEnvironment;
-import java.awt.Toolkit;
-import java.lang.reflect.Method;
-import java.util.concurrent.CountDownLatch;
-
-import javax.swing.JButton;
-import javax.swing.JFrame;
-
-import sun.awt.DisplayChangedListener;
-import sun.awt.SunToolkit;
-
-/**
- * @test
- * @key headful
- * @bug 8207070
- * @modules java.desktop/sun.java2d
- *          java.desktop/sun.awt
- *          java.desktop/sun.awt.windows:open
- */
-public final class DisplayChangesException {
-
-    private static boolean fail;
-    private static CountDownLatch go = new CountDownLatch(1);
-
-    static final class TestThread extends Thread {
-
-        private JFrame frame;
-
-        private TestThread(ThreadGroup tg, String threadName) {
-            super(tg, threadName);
-        }
-
-        public void run() {
-            try {
-                test();
-            } catch (final Exception e) {
-                throw new RuntimeException(e);
-            }
-        }
-
-        private void test() throws Exception {
-            SunToolkit.createNewAppContext();
-            EventQueue.invokeAndWait(() -> {
-                frame = new JFrame();
-                final JButton b = new JButton();
-                b.addPropertyChangeListener(evt -> {
-                    if (!SunToolkit.isDispatchThreadForAppContext(b)) {
-                        System.err.println("Wrong thread:" + currentThread());
-                        fail = true;
-                    }
-                });
-                frame.add(b);
-                frame.setSize(100, 100);
-                frame.setLocationRelativeTo(null);
-                frame.pack();
-            });
-            go.await();
-            EventQueue.invokeAndWait(() -> {
-                frame.dispose();
-            });
-        }
-    }
-
-    public static void main(final String[] args) throws Exception {
-        ThreadGroup tg0 = new ThreadGroup("ThreadGroup0");
-        ThreadGroup tg1 = new ThreadGroup("ThreadGroup1");
-
-        TestThread t0 = new TestThread(tg0, "TestThread 0");
-        TestThread t1 = new TestThread(tg1, "TestThread 1");
-
-        t0.start();
-        t1.start();
-        Thread.sleep(1500); // Cannot use Robot.waitForIdle
-        testToolkit();
-        Thread.sleep(1500);
-        testGE();
-        Thread.sleep(1500);
-        go.countDown();
-
-        if (fail) {
-            throw new RuntimeException();
-        }
-    }
-
-    private static void testGE() {
-        Object ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
-        if (!(ge instanceof DisplayChangedListener)) {
-            return;
-        }
-        ((DisplayChangedListener) ge).displayChanged();
-    }
-
-    private static void testToolkit() {
-        final Class toolkit;
-        try {
-            toolkit = Class.forName("sun.awt.windows.WToolkit");
-        } catch (final ClassNotFoundException ignored) {
-            return;
-        }
-        try {
-            final Method displayChanged = toolkit.getMethod("displayChanged");
-            displayChanged.invoke(Toolkit.getDefaultToolkit());
-        } catch (final Exception e) {
-            e.printStackTrace();
-            fail = true;
-        }
-    }
-}
-
diff --git a/test/jdk/java/awt/font/GlyphVector/GlyphMetricsRotatedFontTest.java b/test/jdk/java/awt/font/GlyphVector/GlyphMetricsRotatedFontTest.java
new file mode 100644
index 00000000000..eb00fd4f34d
--- /dev/null
+++ b/test/jdk/java/awt/font/GlyphVector/GlyphMetricsRotatedFontTest.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8148334 8377937
+ * @summary Checks behavior of GlyphVector.getGlyphMetrics(int) with rotated fonts.
+ */
+
+import java.awt.Font;
+import java.awt.GraphicsEnvironment;
+import java.awt.font.FontRenderContext;
+import java.awt.font.GlyphMetrics;
+import java.awt.font.GlyphVector;
+import java.awt.geom.AffineTransform;
+
+public class GlyphMetricsRotatedFontTest {
+
+    public static void main(String[] args) {
+
+        String text = "The quick brown \r\n fox JUMPS over \t the lazy dog.";
+        FontRenderContext frc = new FontRenderContext(null, true, true);
+
+        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        String[] names = ge.getAvailableFontFamilyNames();
+
+        for (String name : names) {
+
+            Font normal = new Font(name, Font.PLAIN, 60);
+            if (normal.canDisplayUpTo("AZaz09") != -1) {
+                continue;
+            }
+
+            double theta = 0.5; // about 30 degrees
+            AffineTransform tx = AffineTransform.getRotateInstance(theta);
+            Font rotated = normal.deriveFont(tx);
+
+            GlyphVector gv1 = normal.createGlyphVector(frc, text);
+            GlyphVector gv2 = rotated.createGlyphVector(frc, text);
+
+            for (int i = 0; i < gv1.getNumGlyphs(); i++) {
+                GlyphMetrics gm1 = gv1.getGlyphMetrics(i);
+                GlyphMetrics gm2 = gv2.getGlyphMetrics(i);
+                assertEqual(0, gm1.getAdvanceY(), 0, name + " normal y", i);
+                double expectedX = Math.cos(theta) * gm1.getAdvanceX();
+                double expectedY = Math.sin(theta) * gm1.getAdvanceX();
+                assertEqual(expectedX, gm2.getAdvanceX(), 1, name + " rotated x", i);
+                assertEqual(expectedY, gm2.getAdvanceY(), 1, name + " rotated y", i);
+            }
+        }
+    }
+
+    private static void assertEqual(double d1, double d2, double variance,
+                                    String scenario, int index) {
+        if (Math.abs(d1 - d2) > variance) {
+            String msg = String.format("%s for index %d: %f != %f", scenario, index, d1, d2);
+            throw new RuntimeException(msg);
+        }
+    }
+}
diff --git a/test/jdk/java/lang/management/RuntimeMXBean/InputArgument.java b/test/jdk/java/lang/management/RuntimeMXBean/InputArgument.java
index 66c3d3f41f5..0e7609b86ed 100644
--- a/test/jdk/java/lang/management/RuntimeMXBean/InputArgument.java
+++ b/test/jdk/java/lang/management/RuntimeMXBean/InputArgument.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -62,41 +62,60 @@
  * @run main/othervm -Dprops=something InputArgument -Dprops=something
  */
 
+/*
+ * @test
+ * @bug     8378110
+ * @summary RuntimeMXBean.getInputArguments() handling of flags from settings file.
+ *
+ * @run driver InputArgument generateFlagsFile
+ * @run main/othervm -XX:+UseFastJNIAccessors -XX:Flags=InputArgument.flags InputArgument
+ * -XX:+UseFastJNIAccessors -XX:-UseG1GC -XX:+UseParallelGC -XX:MaxHeapSize=100M
+ */
+
 import java.lang.management.*;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.List;
 import java.util.ListIterator;
 
 public class InputArgument {
     private static RuntimeMXBean rm = ManagementFactory.getRuntimeMXBean();
-    private static String vmOption = null;
 
     public static void main(String args[]) throws Exception {
-        // set the expected input argument
-        if (args.length > 0) {
-            vmOption = args[0];
-        }
-
-        List<String> options = rm.getInputArguments();
-        if (vmOption == null) {
+        if (args.length == 1 && "generateFlagsFile".equals(args[0])) {
+            generateFlagsFile();
             return;
         }
 
-        boolean testFailed = true;
+        String[] vmOptions = args;
+        List<String> options = rm.getInputArguments();
         System.out.println("Number of arguments = " + options.size());
         int i = 0;
         for (String arg : options) {
             System.out.println("Input arg " + i + " = " + arg);
             i++;
-            if (arg.equals(vmOption)) {
-                testFailed = false;
-                break;
-            }
         }
-        if (testFailed) {
-            throw new RuntimeException("TEST FAILED: " +
-                "VM option " + vmOption + " not found");
+
+        for (String expected : vmOptions) {
+            boolean found = false;
+            for (String arg : options) {
+                if (arg.equals(expected)) {
+                    found = true;
+                    break;
+                }
+            }
+            if (!found) {
+                throw new RuntimeException("TEST FAILED: " +
+                    "VM option " + expected + " not found");
+            }
         }
 
         System.out.println("Test passed.");
     }
+
+    private static void generateFlagsFile() throws Exception {
+        // 3 types of flag; both boolean cases and 1 numeric
+        Files.writeString(Paths.get("", "InputArgument.flags"),
+            String.format("-UseG1GC%n+UseParallelGC%nMaxHeapSize=100M%n"));
+    }
 }
diff --git a/test/jdk/java/lang/runtime/ObjectMethodsTest.java b/test/jdk/java/lang/runtime/ObjectMethodsTest.java
index 951d3b68383..d7ca5912273 100644
--- a/test/jdk/java/lang/runtime/ObjectMethodsTest.java
+++ b/test/jdk/java/lang/runtime/ObjectMethodsTest.java
@@ -36,11 +36,11 @@ import java.lang.invoke.MethodType;
 import java.lang.runtime.ObjectMethods;
 import static java.lang.invoke.MethodType.methodType;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertThrows;
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.*;
 
 public class ObjectMethodsTest {
 
@@ -144,8 +144,8 @@ public class ObjectMethodsTest {
         assertEquals("Empty[]", (String)handle.invokeExact(new Empty()));
     }
 
-    Class<NullPointerException> NPE = NullPointerException.class;
-    Class<IllegalArgumentException> IAE = IllegalArgumentException.class;
+    private static final Class<NullPointerException> NPE = NullPointerException.class;
+    private static final Class<IllegalArgumentException> IAE = IllegalArgumentException.class;
 
     @Test
     public void exceptions()  {
@@ -157,25 +157,60 @@ public class ObjectMethodsTest {
         assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "toString", C.EQUALS_DESC,    C.class, "x;y", C.ACCESSORS));
         assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "hashCode", C.TO_STRING_DESC, C.class, "x;y", C.ACCESSORS));
         assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "equals",   C.HASHCODE_DESC,  C.class, "x;y", C.ACCESSORS));
+    }
 
-        record NamePlusType(String mn, MethodType mt) {}
-        List<NamePlusType> namePlusTypeList = List.of(
+    record NamePlusType(String name, MethodType type) {}
+
+    static List<NamePlusType> namePlusTypeList() {
+        return List.of(
                 new NamePlusType("toString", C.TO_STRING_DESC),
                 new NamePlusType("equals", C.EQUALS_DESC),
                 new NamePlusType("hashCode", C.HASHCODE_DESC)
         );
-
-        for (NamePlusType npt : namePlusTypeList) {
-            assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, npt.mn(), npt.mt(), C.class, "x;y", null));
-            assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, npt.mn(), npt.mt(), C.class, "x;y", new MethodHandle[]{null}));
-            assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, npt.mn(), npt.mt(), C.class, null,  C.ACCESSORS));
-            assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, npt.mn(), npt.mt(), null,    "x;y", C.ACCESSORS));
-            assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, npt.mn(), null,     C.class, "x;y", C.ACCESSORS));
-            assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, null,     npt.mt(), C.class, "x;y", C.ACCESSORS));
-            assertThrows(NPE, () -> ObjectMethods.bootstrap(null, npt.mn(),     npt.mt(), C.class, "x;y", C.ACCESSORS));
-        }
     }
 
+    @MethodSource("namePlusTypeList")
+    @ParameterizedTest
+    void commonExceptions(NamePlusType npt) {
+        String name = npt.name();
+        MethodType type = npt.type();
+
+        // Null checks
+        assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, name, type, C.class, "x;y", null));
+        assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, name, type, C.class, "x;y", new MethodHandle[]{null}));
+        assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, name, type, C.class, null,  C.ACCESSORS));
+        assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, name, type, null,    "x;y", C.ACCESSORS));
+        assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, name, null, C.class, "x;y", C.ACCESSORS));
+        assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, null, type, C.class, "x;y", C.ACCESSORS));
+        assertThrows(NPE, () -> ObjectMethods.bootstrap(null,   name, type, C.class, "x;y", C.ACCESSORS));
+
+        // Bad indy call receiver type - change C to this test class
+        assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, name, type.changeParameterType(0, this.getClass()), C.class, "x;y", C.ACCESSORS));
+
+        // Bad getter types
+        var wrongReceiverGetter = assertDoesNotThrow(() -> MethodHandles.lookup().findGetter(this.getClass(), "y", int.class));
+        assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, name, type, C.class, "x;y",
+                new MethodHandle[]{
+                        C.ACCESSORS[0],
+                        wrongReceiverGetter,
+                }));
+        var extraArgGetter = MethodHandles.dropArguments(C.ACCESSORS[1], 1, int.class);
+        assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, name, type, C.class, "x;y",
+                new MethodHandle[]{
+                        C.ACCESSORS[0],
+                        extraArgGetter,
+                }));
+        var voidReturnGetter = MethodHandles.empty(MethodType.methodType(void.class, C.class));
+        assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, name, type, C.class, "x;y",
+                new MethodHandle[]{
+                        C.ACCESSORS[0],
+                        voidReturnGetter,
+                }));
+    }
+
+    // same field name and type as C::y, for wrongReceiverGetter
+    private int y;
+
     // Based on the ObjectMethods internal implementation
     private static int hashCombiner(int x, int y) {
         return x*31 + y;
diff --git a/test/jdk/java/net/httpclient/BufferingSubscriberCancelTest.java b/test/jdk/java/net/httpclient/BufferingSubscriberCancelTest.java
index 7813b8c3d7b..4d73ec31280 100644
--- a/test/jdk/java/net/httpclient/BufferingSubscriberCancelTest.java
+++ b/test/jdk/java/net/httpclient/BufferingSubscriberCancelTest.java
@@ -214,6 +214,6 @@ public class BufferingSubscriberCancelTest {
                 return;
             Thread.sleep(100);
         }
-        assertEquals(expected, actual); // will fail with the usual testng message
+        assertEquals(expected, actual); // will fail with the usual junit message
     }
 }
diff --git a/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileDownloadTest.java b/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileDownloadTest.java
index eb397d37b7a..92d359e32c6 100644
--- a/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileDownloadTest.java
+++ b/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileDownloadTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -37,15 +37,11 @@
  *        jdk.test.lib.net.SimpleSSLContext
  *        jdk.test.lib.Platform
  *        jdk.test.lib.util.FileUtils
- * @run testng/othervm BodyHandlerOfFileDownloadTest
+ * @run junit/othervm BodyHandlerOfFileDownloadTest
  */
 
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.util.FileUtils;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.DataProvider;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -73,28 +69,35 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
 import static java.nio.file.StandardOpenOption.CREATE;
 import static java.nio.file.StandardOpenOption.TRUNCATE_EXISTING;
 import static java.nio.file.StandardOpenOption.WRITE;
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertTrue;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class BodyHandlerOfFileDownloadTest implements HttpServerAdapters {
     static final String MSG = "msg";
     static final String contentDispositionValue = "attachment; filename=example.html";
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    HttpTestServer httpTestServer;    // HTTP/1.1      [ 5 servers ]
-    HttpTestServer httpsTestServer;   // HTTPS/1.1
-    HttpTestServer http2TestServer;   // HTTP/2 ( h2c )
-    HttpTestServer https2TestServer;  // HTTP/2 ( h2  )
-    HttpTestServer http3TestServer;   // HTTP/3 ( h3  )
-    String httpURI;
-    String httpsURI;
-    String http2URI;
-    String https2URI;
-    String http3URI;
+    private static HttpTestServer httpTestServer;    // HTTP/1.1      [ 5 servers ]
+    private static HttpTestServer httpsTestServer;   // HTTPS/1.1
+    private static HttpTestServer http2TestServer;   // HTTP/2 ( h2c )
+    private static HttpTestServer https2TestServer;  // HTTP/2 ( h2  )
+    private static HttpTestServer http3TestServer;   // HTTP/3 ( h3  )
+    private static String httpURI;
+    private static String httpsURI;
+    private static String http2URI;
+    private static String https2URI;
+    private static String http3URI;
 
-    FileSystem zipFs;
-    Path defaultFsPath;
-    Path zipFsPath;
+    private static FileSystem zipFs;
+    private static Path defaultFsPath;
+    private static Path zipFsPath;
 
     // Default file system
 
@@ -106,12 +109,10 @@ public class BodyHandlerOfFileDownloadTest implements HttpServerAdapters {
         return dir;
     }
 
-    @DataProvider(name = "defaultFsData")
-    public Object[][] defaultFsData() {
+    public static Object[][] defaultFsData() {
         return new Object[][]{
                 {  http3URI,   defaultFsPath,  MSG,  true   },
                 {  http3URI,   defaultFsPath,  MSG,  false  },
-
                 {  httpURI,    defaultFsPath,  MSG,  true   },
                 {  httpsURI,   defaultFsPath,  MSG,  true   },
                 {  http2URI,   defaultFsPath,  MSG,  true   },
@@ -123,7 +124,8 @@ public class BodyHandlerOfFileDownloadTest implements HttpServerAdapters {
         };
     }
 
-    @Test(dataProvider = "defaultFsData")
+    @ParameterizedTest
+    @MethodSource("defaultFsData")
     public void testDefaultFs(String uriString,
                               Path path,
                               String expectedMsg,
@@ -171,10 +173,10 @@ public class BodyHandlerOfFileDownloadTest implements HttpServerAdapters {
             out.printf("Resp code: %s\n", resp.statusCode());
             out.println("Resp body Path: " + resp.body());
             out.printf("Resp body written to file: %s\n", msg);
-            assertEquals(resp.statusCode(), 200);
-            assertEquals(msg, expectedMsg);
+            assertEquals(200, resp.statusCode());
+            assertEquals(expectedMsg, msg);
             assertTrue(resp.headers().firstValue("Content-Disposition").isPresent());
-            assertEquals(resp.headers().firstValue("Content-Disposition").get(), contentDispositionValue);
+            assertEquals(contentDispositionValue, resp.headers().firstValue("Content-Disposition").get());
             if (!sameClient) {
                 client.close();
             }
@@ -199,15 +201,17 @@ public class BodyHandlerOfFileDownloadTest implements HttpServerAdapters {
         return dir;
     }
 
-    @Test(expectedExceptions = IllegalArgumentException.class)
+    @Test
     public void testZipFs() {
-        out.printf("\n\n--- testZipFs(): starting\n");
-        BodyHandlers.ofFileDownload(zipFsPath, CREATE, TRUNCATE_EXISTING, WRITE);
+        Assertions.assertThrows(IllegalArgumentException.class, () -> {
+            out.printf("\n\n--- testZipFs(): starting\n");
+            BodyHandlers.ofFileDownload(zipFsPath, CREATE, TRUNCATE_EXISTING, WRITE);
+        });
     }
 
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         defaultFsPath = defaultFsDir();
         zipFs = newZipFs();
         zipFsPath = zipFsDir(zipFs);
@@ -239,8 +243,8 @@ public class BodyHandlerOfFileDownloadTest implements HttpServerAdapters {
         http3TestServer.start();
     }
 
-    @AfterTest
-    public void teardown() throws Exception {
+    @AfterAll
+    public static void teardown() throws Exception {
         if (Files.exists(zipFsPath))
             FileUtils.deleteFileTreeWithRetry(zipFsPath);
         if (Files.exists(defaultFsPath))
diff --git a/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileTest.java b/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileTest.java
index 13871933eac..53b8607f294 100644
--- a/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileTest.java
+++ b/test/jdk/java/net/httpclient/PathSubscriber/BodyHandlerOfFileTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -36,15 +36,11 @@
  *        jdk.httpclient.test.lib.http2.Queue
  *        jdk.test.lib.net.SimpleSSLContext
  *        jdk.test.lib.Platform jdk.test.lib.util.FileUtils
- * @run testng/othervm BodyHandlerOfFileTest
+ * @run junit/othervm BodyHandlerOfFileTest
  */
 
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.util.FileUtils;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.DataProvider;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -56,7 +52,10 @@ import java.net.http.HttpRequest;
 import java.net.http.HttpRequest.BodyPublishers;
 import java.net.http.HttpResponse;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.*;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Map;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import static java.lang.System.out;
@@ -66,26 +65,31 @@ import static java.net.http.HttpClient.Version.HTTP_2;
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
-import static org.testng.Assert.assertEquals;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class BodyHandlerOfFileTest implements HttpServerAdapters {
     static final String MSG = "msg";
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    HttpTestServer httpTestServer;    // HTTP/1.1      [ 5 servers ]
-    HttpTestServer httpsTestServer;   // HTTPS/1.1
-    HttpTestServer http2TestServer;   // HTTP/2 ( h2c )
-    HttpTestServer https2TestServer;  // HTTP/2 ( h2  )
-    HttpTestServer http3TestServer;   // HTTP/3 ( h3  )
-    String httpURI;
-    String httpsURI;
-    String http2URI;
-    String https2URI;
-    String http3URI;
+    private static HttpTestServer httpTestServer;    // HTTP/1.1      [ 5 servers ]
+    private static HttpTestServer httpsTestServer;   // HTTPS/1.1
+    private static HttpTestServer http2TestServer;   // HTTP/2 ( h2c )
+    private static HttpTestServer https2TestServer;  // HTTP/2 ( h2  )
+    private static HttpTestServer http3TestServer;   // HTTP/3 ( h3  )
+    private static String httpURI;
+    private static String httpsURI;
+    private static String http2URI;
+    private static String https2URI;
+    private static String http3URI;
 
-    FileSystem zipFs;
-    Path defaultFsPath;
-    Path zipFsPath;
+    private static FileSystem zipFs;
+    private static Path defaultFsPath;
+    private static Path zipFsPath;
 
     // Default file system set-up
 
@@ -97,8 +101,7 @@ public class BodyHandlerOfFileTest implements HttpServerAdapters {
         return file;
     }
 
-    @DataProvider(name = "defaultFsData")
-    public Object[][] defaultFsData() {
+    public static Object[][] defaultFsData() {
         return new Object[][]{
                 {  http3URI,   defaultFsPath,  MSG,  true   },
                 {  http3URI,   defaultFsPath,  MSG,  false  },
@@ -114,7 +117,8 @@ public class BodyHandlerOfFileTest implements HttpServerAdapters {
         };
     }
 
-    @Test(dataProvider = "defaultFsData")
+    @ParameterizedTest
+    @MethodSource("defaultFsData")
     public void testDefaultFs(String uriString,
                               Path path,
                               String expectedMsg,
@@ -139,8 +143,7 @@ public class BodyHandlerOfFileTest implements HttpServerAdapters {
         return file;
     }
 
-    @DataProvider(name = "zipFsData")
-    public Object[][] zipFsData() {
+    public static Object[][] zipFsData() {
         return new Object[][]{
                 {  http3URI,   zipFsPath,  MSG,  true   },
                 {  http3URI,   zipFsPath,  MSG,  false  },
@@ -156,7 +159,8 @@ public class BodyHandlerOfFileTest implements HttpServerAdapters {
         };
     }
 
-    @Test(dataProvider = "zipFsData")
+    @ParameterizedTest
+    @MethodSource("zipFsData")
     public void testZipFs(String uriString,
                           Path path,
                           String expectedMsg,
@@ -203,8 +207,8 @@ public class BodyHandlerOfFileTest implements HttpServerAdapters {
             String msg = Files.readString(path, StandardCharsets.UTF_8);
             out.printf("Resp code: %s\n", resp.statusCode());
             out.printf("Msg written to %s: %s\n", resp.body(), msg);
-            assertEquals(resp.statusCode(), 200);
-            assertEquals(msg, expectedMsg);
+            assertEquals(200, resp.statusCode());
+            assertEquals(expectedMsg, msg);
             if (!sameClient) {
                 client.close();
             }
@@ -214,8 +218,8 @@ public class BodyHandlerOfFileTest implements HttpServerAdapters {
         }
     }
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         defaultFsPath = defaultFsFile();
         zipFs = newZipFs();
         zipFsPath = zipFsFile(zipFs);
@@ -247,8 +251,8 @@ public class BodyHandlerOfFileTest implements HttpServerAdapters {
         http3TestServer.start();
     }
 
-    @AfterTest
-    public void teardown() throws Exception {
+    @AfterAll
+    public static void teardown() throws Exception {
         if (Files.exists(zipFsPath))
             FileUtils.deleteFileTreeWithRetry(zipFsPath);
         if (Files.exists(defaultFsPath))
diff --git a/test/jdk/java/net/httpclient/PathSubscriber/BodySubscriberOfFileTest.java b/test/jdk/java/net/httpclient/PathSubscriber/BodySubscriberOfFileTest.java
index d7c9a3af4f1..da0c7220b6b 100644
--- a/test/jdk/java/net/httpclient/PathSubscriber/BodySubscriberOfFileTest.java
+++ b/test/jdk/java/net/httpclient/PathSubscriber/BodySubscriberOfFileTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -35,15 +35,11 @@
  *        jdk.httpclient.test.lib.http2.OutgoingPushPromise
  *        jdk.httpclient.test.lib.http2.Queue jdk.test.lib.net.SimpleSSLContext
  *        jdk.test.lib.Platform jdk.test.lib.util.FileUtils
- * @run testng/othervm BodySubscriberOfFileTest
+ * @run junit/othervm BodySubscriberOfFileTest
  */
 
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.util.FileUtils;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.DataProvider;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -58,7 +54,10 @@ import java.net.http.HttpResponse.BodySubscribers;
 import java.nio.Buffer;
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.*;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Map;
 import java.util.concurrent.Flow;
 import java.util.stream.IntStream;
@@ -70,26 +69,32 @@ import static java.net.http.HttpClient.Version.HTTP_2;
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
-import static org.testng.Assert.assertEquals;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class BodySubscriberOfFileTest implements HttpServerAdapters {
     static final String MSG = "msg";
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    HttpTestServer httpTestServer;    // HTTP/1.1      [ 5 servers ]
-    HttpTestServer httpsTestServer;   // HTTPS/1.1
-    HttpTestServer http2TestServer;   // HTTP/2 ( h2c )
-    HttpTestServer https2TestServer;  // HTTP/2 ( h2  )
-    HttpTestServer http3TestServer;   // HTTP/3 ( h3  )
-    String httpURI;
-    String httpsURI;
-    String http2URI;
-    String https2URI;
-    String http3URI;
+    private static HttpTestServer httpTestServer;    // HTTP/1.1      [ 5 servers ]
+    private static HttpTestServer httpsTestServer;   // HTTPS/1.1
+    private static HttpTestServer http2TestServer;   // HTTP/2 ( h2c )
+    private static HttpTestServer https2TestServer;  // HTTP/2 ( h2  )
+    private static HttpTestServer http3TestServer;   // HTTP/3 ( h3  )
+    private static String httpURI;
+    private static String httpsURI;
+    private static String http2URI;
+    private static String https2URI;
+    private static String http3URI;
 
-    FileSystem zipFs;
-    Path defaultFsPath;
-    Path zipFsPath;
+    private static FileSystem zipFs;
+    private static Path defaultFsPath;
+    private static Path zipFsPath;
 
     // Default file system set-up
 
@@ -101,8 +106,7 @@ public class BodySubscriberOfFileTest implements HttpServerAdapters {
         return file;
     }
 
-    @DataProvider(name = "defaultFsData")
-    public Object[][] defaultFsData() {
+    public static Object[][] defaultFsData() {
         return new Object[][]{
                 {  http3URI,   defaultFsPath,  MSG,  true   },
                 {  http3URI,   defaultFsPath,  MSG,  false  },
@@ -118,7 +122,8 @@ public class BodySubscriberOfFileTest implements HttpServerAdapters {
         };
     }
 
-    @Test(dataProvider = "defaultFsData")
+    @ParameterizedTest
+    @MethodSource("defaultFsData")
     public void testDefaultFs(String uriString,
                               Path path,
                               String expectedMsg,
@@ -143,8 +148,7 @@ public class BodySubscriberOfFileTest implements HttpServerAdapters {
         return file;
     }
 
-    @DataProvider(name = "zipFsData")
-    public Object[][] zipFsData() {
+    public static Object[][] zipFsData() {
         return new Object[][]{
                 {  http3URI,   zipFsPath,  MSG,  true   },
                 {  http3URI,   zipFsPath,  MSG,  false  },
@@ -160,7 +164,8 @@ public class BodySubscriberOfFileTest implements HttpServerAdapters {
         };
     }
 
-    @Test(dataProvider = "zipFsData")
+    @ParameterizedTest
+    @MethodSource("zipFsData")
     public void testZipFs(String uriString,
                           Path path,
                           String expectedMsg,
@@ -209,8 +214,8 @@ public class BodySubscriberOfFileTest implements HttpServerAdapters {
             String msg = Files.readString(path, StandardCharsets.UTF_8);
             out.printf("Resp code: %s\n", resp.statusCode());
             out.printf("Msg written to %s: %s\n", resp.body(), msg);
-            assertEquals(resp.statusCode(), 200);
-            assertEquals(msg, expectedMsg);
+            assertEquals(200, resp.statusCode());
+            assertEquals(expectedMsg, msg);
             if (!sameClient) {
                 client.close();
             }
@@ -240,12 +245,12 @@ public class BodySubscriberOfFileTest implements HttpServerAdapters {
         });
         subscriber.onNext(buffers);
         subscriber.onComplete();
-        buffers.forEach(b -> assertEquals(b.remaining(), 0) );
+        buffers.forEach(b -> assertEquals(0, b.remaining()) );
         assertEquals(expectedSize, Files.size(defaultFsPath));
     }
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         defaultFsPath = defaultFsFile();
         zipFs = newZipFs();
         zipFsPath = zipFsFile(zipFs);
@@ -277,8 +282,8 @@ public class BodySubscriberOfFileTest implements HttpServerAdapters {
         http3TestServer.start();
     }
 
-    @AfterTest
-    public void teardown() throws Exception {
+    @AfterAll
+    public static void teardown() throws Exception {
         if (Files.exists(zipFsPath))
             FileUtils.deleteFileTreeWithRetry(zipFsPath);
         if (Files.exists(defaultFsPath))
diff --git a/test/jdk/java/net/httpclient/http3/BadCipherSuiteErrorTest.java b/test/jdk/java/net/httpclient/http3/BadCipherSuiteErrorTest.java
index 727f2c78352..fdfc498b21e 100644
--- a/test/jdk/java/net/httpclient/http3/BadCipherSuiteErrorTest.java
+++ b/test/jdk/java/net/httpclient/http3/BadCipherSuiteErrorTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,7 +26,7 @@
  * @bug 8157105
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.HttpServerAdapters
- * @run testng/othervm/timeout=60 -Djavax.net.debug=ssl -Djdk.httpclient.HttpClient.log=all BadCipherSuiteErrorTest
+ * @run junit/othervm/timeout=60 -Djavax.net.debug=ssl -Djdk.httpclient.HttpClient.log=all BadCipherSuiteErrorTest
  * @summary check exception thrown when bad TLS parameters selected
  */
 
@@ -49,7 +49,7 @@ import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
-import org.testng.annotations.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * When selecting an unacceptable cipher suite the TLS handshake will fail.
diff --git a/test/jdk/java/net/httpclient/http3/H3BadHeadersTest.java b/test/jdk/java/net/httpclient/http3/H3BadHeadersTest.java
index fb0e1ef3085..fff11f4ceb4 100644
--- a/test/jdk/java/net/httpclient/http3/H3BadHeadersTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3BadHeadersTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,17 +27,13 @@
  * @build jdk.httpclient.test.lib.common.HttpServerAdapters
  *        jdk.test.lib.net.SimpleSSLContext
  * @compile ../ReferenceTracker.java
- * @run testng/othervm -Djdk.internal.httpclient.debug=true H3BadHeadersTest
+ * @run junit/othervm -Djdk.internal.httpclient.debug=true H3BadHeadersTest
  * @summary this test verifies the behaviour of the HttpClient when presented
  *          with bad headers
  */
 
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.DataProvider;
-import org.testng.annotations.Test;
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
 import java.io.InputStream;
@@ -57,10 +53,17 @@ import java.util.concurrent.ExecutionException;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 import static java.util.List.of;
 import static java.util.Map.entry;
-import static org.testng.Assert.assertTrue;
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertNotNull;
-import static org.testng.Assert.fail;
+
+import org.junit.jupiter.api.AfterAll;
+
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.fail;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
 
 public class H3BadHeadersTest implements HttpServerAdapters  {
 
@@ -76,14 +79,13 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
     static final ReferenceTracker TRACKER = ReferenceTracker.INSTANCE;
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    HttpTestServer http3TestServer;   // HTTP/3 ( h3 only )
-    HttpTestServer https2TestServer;  // HTTP/2 ( h2 + h3 )
-    String http3URI;
-    String https2URI;
+    private static HttpTestServer http3TestServer;   // HTTP/3 ( h3 only )
+    private static HttpTestServer https2TestServer;  // HTTP/2 ( h2 + h3 )
+    private static String http3URI;
+    private static String https2URI;
 
 
-    @DataProvider(name = "variants")
-    public Object[][] variants() {
+    public static Object[][] variants() {
         return new Object[][] {
                 { http3URI,  false},
                 { https2URI, false},
@@ -93,7 +95,8 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
     }
 
 
-    @Test(dataProvider = "variants")
+    @ParameterizedTest
+    @MethodSource("variants")
     void test(String uri,
               boolean sameClient)
         throws Exception
@@ -126,8 +129,8 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
                         .HEAD().setOption(H3_DISCOVERY, config).build();
                 System.out.println("\nSending HEAD request: " + head);
                 var headResponse = client.send(head, BodyHandlers.ofString());
-                assertEquals(headResponse.statusCode(), 200);
-                assertEquals(headResponse.version(), Version.HTTP_2);
+                assertEquals(200, headResponse.statusCode());
+                assertEquals(Version.HTTP_2, headResponse.version());
             }
 
             URI uriWithQuery = URI.create(uri +  "?BAD_HEADERS=" + i);
@@ -163,7 +166,8 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
         System.err.printf("%ntest %s, %s, DONE%n%n", uri, sameClient);
     }
 
-    @Test(dataProvider = "variants")
+    @ParameterizedTest
+    @MethodSource("variants")
     void testAsync(String uri,
                    boolean sameClient) throws Exception
     {
@@ -199,8 +203,8 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
                 System.out.println("\nSending HEAD request: " + head);
 
                 var headResponse = client.send(head, BodyHandlers.ofString());
-                assertEquals(headResponse.statusCode(), 200);
-                assertEquals(headResponse.version(), Version.HTTP_2);
+                assertEquals(200, headResponse.statusCode());
+                assertEquals(Version.HTTP_2, headResponse.version());
             }
 
             URI uriWithQuery = URI.create(uri +  "?BAD_HEADERS=" + i);
@@ -246,8 +250,7 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
     // sync with implementation.
     static void assertDetailMessage(Throwable throwable, int iterationIndex) {
         try {
-            assertTrue(throwable instanceof IOException,
-                    "Expected IOException, got, " + throwable);
+            assertInstanceOf(IOException.class, throwable, "Expected IOException, got, " + throwable);
             assertNotNull(throwable.getMessage(), "No message for " + throwable);
             assertTrue(throwable.getMessage().contains("malformed response"),
                     "Expected \"malformed response\" in: " + throwable.getMessage());
@@ -269,8 +272,8 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
         }
     }
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         System.out.println("creating servers");
         http3TestServer =  HttpTestServer.create(Http3DiscoveryMode.HTTP_3_URI_ONLY, sslContext);
         http3TestServer.addHandler(new BadHeadersHandler(), "/http3/echo");
@@ -285,8 +288,8 @@ public class H3BadHeadersTest implements HttpServerAdapters  {
         System.out.println("server started");
     }
 
-    @AfterTest
-    public void teardown() throws Exception {
+    @AfterAll
+    public static void teardown() throws Exception {
         System.err.println("\n\n**** stopping servers\n");
         System.out.println("stopping servers");
         http3TestServer.stop();
diff --git a/test/jdk/java/net/httpclient/http3/H3BasicTest.java b/test/jdk/java/net/httpclient/http3/H3BasicTest.java
index a03df11c1a3..bddb9879ae9 100644
--- a/test/jdk/java/net/httpclient/http3/H3BasicTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3BasicTest.java
@@ -31,7 +31,7 @@
  *        jdk.test.lib.Asserts
  *        jdk.test.lib.Utils
  *        jdk.test.lib.net.SimpleSSLContext
- * @run testng/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors
+ * @run junit/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors
  *                     -Djdk.internal.httpclient.debug=true
  *                     H3BasicTest
  */
@@ -60,7 +60,6 @@ import jdk.httpclient.test.lib.http2.Http2TestServer;
 import jdk.httpclient.test.lib.http3.Http3TestServer;
 import jdk.test.lib.RandomFactory;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.Test;
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 import static java.net.http.HttpOption.Http3DiscoveryMode.ALT_SVC;
@@ -70,6 +69,8 @@ import static jdk.test.lib.Asserts.assertFileContentsEqual;
 import static jdk.test.lib.Utils.createTempFile;
 import static jdk.test.lib.Utils.createTempFileOfSize;
 
+import org.junit.jupiter.api.Test;
+
 public class H3BasicTest implements HttpServerAdapters {
 
     private static final Random RANDOM = RandomFactory.getRandom();
@@ -151,7 +152,7 @@ public class H3BasicTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void test() throws Exception {
+    public void test() throws Exception {
         try {
             initialize();
             System.out.println("servers initialized");
diff --git a/test/jdk/java/net/httpclient/http3/H3ConcurrentPush.java b/test/jdk/java/net/httpclient/http3/H3ConcurrentPush.java
index 0cdb2f900fd..4392f829258 100644
--- a/test/jdk/java/net/httpclient/http3/H3ConcurrentPush.java
+++ b/test/jdk/java/net/httpclient/http3/H3ConcurrentPush.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
  * @test
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm
+ * @run junit/othervm
  *      -Djdk.internal.httpclient.debug=true
  *      -Djdk.httpclient.HttpClient.log=errors,requests,responses,trace
  *      -Djdk.httpclient.http3.maxConcurrentPushStreams=45
@@ -73,17 +73,18 @@ import java.util.function.Supplier;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.internal.net.http.common.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpOption.Http3DiscoveryMode.ALT_SVC;
 import static java.net.http.HttpOption.Http3DiscoveryMode.ANY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertNull;
-import static org.testng.Assert.assertTrue;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 public class H3ConcurrentPush implements HttpServerAdapters {
 
@@ -92,7 +93,7 @@ public class H3ConcurrentPush implements HttpServerAdapters {
     static final PrintStream err = System.err;
     static final PrintStream out = System.out;
 
-    static Map<String,String> PUSH_PROMISES = Map.of(
+    static final Map<String,String> PUSH_PROMISES = Map.of(
             "/x/y/z/1", "the first push promise body",
             "/x/y/z/2", "the second push promise body",
             "/x/y/z/3", "the third push promise body",
@@ -105,13 +106,13 @@ public class H3ConcurrentPush implements HttpServerAdapters {
     );
     static final String MAIN_RESPONSE_BODY = "the main response body";
 
-    HttpTestServer  server;
-    URI uri;
-    URI headURI;
-    ServerPushHandler pushHandler;
+    private static HttpTestServer server;
+    private static URI uri;
+    private static URI headURI;
+    private static ServerPushHandler pushHandler;
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         server = HttpTestServer.create(ANY, SimpleSSLContext.findSSLContext());
         pushHandler = new ServerPushHandler(MAIN_RESPONSE_BODY, PUSH_PROMISES);
         server.addHandler(pushHandler, "/push/");
@@ -122,14 +123,14 @@ public class H3ConcurrentPush implements HttpServerAdapters {
         headURI = new URI("https://" + server.serverAuthority() + "/head/x");
     }
 
-    @AfterTest
-    public void teardown() {
+    @AfterAll
+    public static void teardown() {
         server.stop();
     }
 
     static <T> HttpResponse<T> assert200ResponseCode(HttpResponse<T> response) {
-        assertEquals(response.statusCode(), 200);
-        assertEquals(response.version(), Version.HTTP_3);
+        assertEquals(200, response.statusCode());
+        assertEquals(Version.HTTP_3, response.version());
         return response;
     }
 
@@ -137,8 +138,8 @@ public class H3ConcurrentPush implements HttpServerAdapters {
         HttpRequest headRequest = HttpRequest.newBuilder(headURI)
                 .HEAD().version(Version.HTTP_2).build();
         var headResponse = client.send(headRequest, BodyHandlers.ofString());
-        assertEquals(headResponse.statusCode(), 200);
-        assertEquals(headResponse.version(), Version.HTTP_2);
+        assertEquals(200, headResponse.statusCode());
+        assertEquals(Version.HTTP_2, headResponse.version());
     }
 
     static final class TestPushPromiseHandler<T> implements PushPromiseHandler<T> {
@@ -233,16 +234,16 @@ public class H3ConcurrentPush implements HttpServerAdapters {
 
                 promises.forEach((request, value) -> {
                     HttpResponse<String> response = value.join();
-                    assertEquals(response.statusCode(), 200);
+                    assertEquals(200, response.statusCode());
                     if (PUSH_PROMISES.containsKey(request.uri().getPath())) {
-                        assertEquals(response.body(), PUSH_PROMISES.get(request.uri().getPath()));
+                        assertEquals(PUSH_PROMISES.get(request.uri().getPath()), response.body());
                     } else {
-                        assertEquals(response.body(), MAIN_RESPONSE_BODY);
+                        assertEquals(MAIN_RESPONSE_BODY, response.body());
                     }
                 });
 
                 int expectedPushes = Math.min(PUSH_PROMISES.size(), maxPushes) + 5;
-                assertEquals(promises.size(), expectedPushes);
+                assertEquals(expectedPushes, promises.size());
 
                 promises.clear();
 
@@ -251,12 +252,12 @@ public class H3ConcurrentPush implements HttpServerAdapters {
                     client.sendAsync(HttpRequest.newBuilder(uri).build(), BodyHandlers.ofString())
                             .thenApply(H3ConcurrentPush::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                 } catch (CompletionException c) {
                     throw new AssertionError(c.getCause());
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // Send with no promise handler, but use pushId bigger than allowed.
                 // This should cause the connection to get closed
@@ -268,7 +269,7 @@ public class H3ConcurrentPush implements HttpServerAdapters {
                     client.sendAsync(bigger, BodyHandlers.ofString())
                             .thenApply(H3ConcurrentPush::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                     throw new AssertionError("Expected IOException not thrown");
                 } catch (CompletionException c) {
@@ -287,7 +288,7 @@ public class H3ConcurrentPush implements HttpServerAdapters {
                         throw new AssertionError("Unexpected exception: " + c.getCause(), c.getCause());
                     }
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // the next time around we should have a new connection,
                 // so we can restart from scratch
@@ -298,7 +299,7 @@ public class H3ConcurrentPush implements HttpServerAdapters {
             var error = errors.stream().findFirst().orElse(null);
             if (error != null) throw error;
             var notified = custom.notified;
-            assertEquals(notified.size(), 9*4*2, "Unexpected notification: " + notified);
+            assertEquals(9*4*2, notified.size(), "Unexpected notification: " + notified);
         }
     }
 
diff --git a/test/jdk/java/net/httpclient/http3/H3ConnectionPoolTest.java b/test/jdk/java/net/httpclient/http3/H3ConnectionPoolTest.java
index c90059ccbfd..614d564005b 100644
--- a/test/jdk/java/net/httpclient/http3/H3ConnectionPoolTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3ConnectionPoolTest.java
@@ -28,7 +28,7 @@
  *        jdk.test.lib.Asserts
  *        jdk.test.lib.Utils
  *        jdk.test.lib.net.SimpleSSLContext
- * @run testng/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors,http3,quic:hs
+ * @run junit/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors,http3,quic:hs
  *                     -Djdk.internal.httpclient.debug=false
  *                     H3ConnectionPoolTest
  */
@@ -53,7 +53,6 @@ import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.httpclient.test.lib.http2.Http2TestServer;
 import jdk.httpclient.test.lib.http3.Http3TestServer;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Version.HTTP_2;
 import static java.net.http.HttpClient.Version.HTTP_3;
@@ -65,6 +64,8 @@ import static jdk.test.lib.Asserts.assertEquals;
 import static jdk.test.lib.Asserts.assertNotEquals;
 import static jdk.test.lib.Asserts.assertTrue;
 
+import org.junit.jupiter.api.Test;
+
 public class H3ConnectionPoolTest implements HttpServerAdapters {
 
     private static final String CLASS_NAME = H3ConnectionPoolTest.class.getSimpleName();
@@ -172,7 +173,7 @@ public class H3ConnectionPoolTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void testH3Only() throws Exception {
+    public void testH3Only() throws Exception {
         System.out.println("\nTesting HTTP/3 only");
         initialize(true);
         try (HttpClient client = getClient()) {
@@ -212,12 +213,12 @@ public class H3ConnectionPoolTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void testH2H3WithTwoAltSVC() throws Exception {
+    public void testH2H3WithTwoAltSVC() throws Exception {
         testH2H3(false);
     }
 
     @Test
-    public static void testH2H3WithAltSVCOnSamePort() throws Exception {
+    public void testH2H3WithAltSVCOnSamePort() throws Exception {
         testH2H3(true);
     }
 
@@ -309,7 +310,7 @@ public class H3ConnectionPoolTest implements HttpServerAdapters {
                 // fourth request with HTTP_3_URI_ONLY should reuse the first connection,
                 // and not reuse the second.
                 HttpRequest request4 = req1Builder.copy().build();
-                HttpResponse<String> response4 = client.send(request1, BodyHandlers.ofString());
+                HttpResponse<String> response4 = client.send(request4, BodyHandlers.ofString());
                 assertEquals(HTTP_3, response4.version());
                 assertEquals(response4.connectionLabel().get(), response1.connectionLabel().get());
                 assertNotEquals(response4.connectionLabel().get(), response3.connectionLabel().get());
@@ -345,12 +346,12 @@ public class H3ConnectionPoolTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void testParallelH2H3WithTwoAltSVC() throws Exception {
+    public void testParallelH2H3WithTwoAltSVC() throws Exception {
         testH2H3Concurrent(false);
     }
 
     @Test
-    public static void testParallelH2H3WithAltSVCOnSamePort() throws Exception {
+    public void testParallelH2H3WithAltSVCOnSamePort() throws Exception {
         testH2H3Concurrent(true);
     }
 
diff --git a/test/jdk/java/net/httpclient/http3/H3FixedThreadPoolTest.java b/test/jdk/java/net/httpclient/http3/H3FixedThreadPoolTest.java
index 6c181186fda..fd0e8214361 100644
--- a/test/jdk/java/net/httpclient/http3/H3FixedThreadPoolTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3FixedThreadPoolTest.java
@@ -36,7 +36,7 @@
  *          JTreg on Tier 7 so that, if the client becomes wedged again, the
  *          JTreg timeout handlers can collect more diagnostic information.
  *
- * @run testng/othervm  -Djdk.internal.httpclient.debug=err
+ * @run junit/othervm  -Djdk.internal.httpclient.debug=err
  *                      -Djdk.httpclient.HttpClient.log=ssl,headers,requests,responses,errors
  *                      -Djdk.httpclient.quic.idleTimeout=666666
  *                      -Djdk.test.server.quic.idleTimeout=666666
@@ -69,7 +69,7 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
 import static jdk.test.lib.Asserts.assertFileContentsEqual;
 import static jdk.test.lib.Utils.createTempFileOfSize;
 
-import org.testng.annotations.Test;
+import org.junit.jupiter.api.Test;
 
 public class H3FixedThreadPoolTest implements HttpServerAdapters {
 
@@ -118,7 +118,7 @@ public class H3FixedThreadPoolTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void test() throws Exception {
+    public void test() throws Exception {
         try {
             initialize();
             simpleTest(false);
diff --git a/test/jdk/java/net/httpclient/http3/H3HeaderSizeLimitTest.java b/test/jdk/java/net/httpclient/http3/H3HeaderSizeLimitTest.java
index b48ef9a33f3..d5864989436 100644
--- a/test/jdk/java/net/httpclient/http3/H3HeaderSizeLimitTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3HeaderSizeLimitTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,7 +29,6 @@ import java.net.http.HttpClient.Version;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
 import java.net.http.HttpResponse.BodyHandlers;
-import java.time.Duration;
 import java.util.concurrent.ExecutionException;
 
 import javax.net.ssl.SSLContext;
@@ -39,16 +38,16 @@ import jdk.httpclient.test.lib.http3.Http3TestServer;
 import jdk.httpclient.test.lib.quic.QuicServer;
 import jdk.internal.net.http.Http3ConnectionAccess;
 import jdk.internal.net.http.http3.ConnectionSettings;
-import jdk.test.lib.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.net.URIBuilder;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
 /*
  * @test
  * @summary Verifies that the HTTP client respects the SETTINGS_MAX_FIELD_SECTION_SIZE setting on HTTP3 connection
@@ -57,7 +56,7 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
  * @build java.net.http/jdk.internal.net.http.Http3ConnectionAccess
- * @run testng/othervm
+ * @run junit/othervm
  *              -Djdk.internal.httpclient.debug=true
  *              -Djdk.httpclient.HttpClient.log=requests,responses,errors H3HeaderSizeLimitTest
  */
@@ -65,11 +64,11 @@ public class H3HeaderSizeLimitTest implements HttpServerAdapters {
 
     private static final long HEADER_SIZE_LIMIT_BYTES = 1024;
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    private HttpTestServer h3Server;
-    private String requestURIBase;
+    private static HttpTestServer h3Server;
+    private static String requestURIBase;
 
-    @BeforeClass
-    public void beforeClass() throws Exception {
+    @BeforeAll
+    public static void beforeClass() throws Exception {
         final QuicServer quicServer = Http3TestServer.quicServerBuilder()
                 .sslContext(sslContext)
                 .build();
@@ -82,8 +81,8 @@ public class H3HeaderSizeLimitTest implements HttpServerAdapters {
                 .port(h3Server.getAddress().getPort()).build().toString();
     }
 
-    @AfterClass
-    public void afterClass() throws Exception {
+    @AfterAll
+    public static void afterClass() throws Exception {
         if (h3Server != null) {
             System.out.println("Stopping server " + h3Server.getAddress());
             h3Server.stop();
@@ -111,7 +110,7 @@ public class H3HeaderSizeLimitTest implements HttpServerAdapters {
             final HttpResponse<Void> response = client.send(
                     reqBuilder.build(),
                     BodyHandlers.discarding());
-            Assert.assertEquals(response.statusCode(), 200, "Unexpected status code");
+            Assertions.assertEquals(200, response.statusCode(), "Unexpected status code");
             if (i == 3) {
                 var cf = Http3ConnectionAccess.peerSettings(client, response);
                 if (!cf.isDone()) {
@@ -131,14 +130,14 @@ public class H3HeaderSizeLimitTest implements HttpServerAdapters {
         }
         final HttpRequest request = reqBuilder.build();
         System.out.println("Issuing request to " + reqURI);
-        final IOException thrown = Assert.expectThrows(ProtocolException.class,
+        final IOException thrown = Assertions.assertThrows(ProtocolException.class,
                 () -> client.send(request, BodyHandlers.discarding()));
         if (!thrown.getMessage().equals("Request headers size exceeds limit set by peer")) {
             throw thrown;
         }
         // test same with async
         System.out.println("Issuing async request to " + reqURI);
-        final ExecutionException asyncThrown = Assert.expectThrows(ExecutionException.class,
+        final ExecutionException asyncThrown = Assertions.assertThrows(ExecutionException.class,
                 () -> client.sendAsync(request, BodyHandlers.discarding()).get());
         if (!(asyncThrown.getCause() instanceof ProtocolException)) {
             System.err.println("Received unexpected cause");
diff --git a/test/jdk/java/net/httpclient/http3/H3HeadersEncoding.java b/test/jdk/java/net/httpclient/http3/H3HeadersEncoding.java
index 44ccfac4a6a..6b7b24f049d 100644
--- a/test/jdk/java/net/httpclient/http3/H3HeadersEncoding.java
+++ b/test/jdk/java/net/httpclient/http3/H3HeadersEncoding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,7 +27,7 @@
  * @build jdk.httpclient.test.lib.common.HttpServerAdapters
  *        jdk.test.lib.net.SimpleSSLContext
  * @compile ../ReferenceTracker.java
- * @run testng/othervm -Djdk.httpclient.qpack.encoderTableCapacityLimit=4096
+ * @run junit/othervm -Djdk.httpclient.qpack.encoderTableCapacityLimit=4096
  *                     -Djdk.httpclient.qpack.decoderMaxTableCapacity=4096
  *                     -Dhttp3.test.server.encoderAllowedHeaders=*
  *                     -Dhttp3.test.server.decoderMaxTableCapacity=4096
@@ -40,9 +40,6 @@
 
 import jdk.test.lib.RandomFactory;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -72,17 +69,21 @@ import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 import static jdk.httpclient.test.lib.common.HttpServerAdapters.*;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
 public class H3HeadersEncoding {
 
     private static final int REQUESTS_COUNT = 500;
     private static final int HEADERS_PER_REQUEST = 20;
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    HttpTestServer http3TestServer;
-    HeadersHandler serverHeadersHandler;
-    String http3URI;
+    private static HttpTestServer http3TestServer;
+    private static HeadersHandler serverHeadersHandler;
+    private static String http3URI;
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         System.out.println("Creating servers");
         http3TestServer = HttpTestServer.create(Http3DiscoveryMode.HTTP_3_URI_ONLY, sslContext);
         serverHeadersHandler = new HeadersHandler();
@@ -92,8 +93,8 @@ public class H3HeadersEncoding {
         http3TestServer.start();
     }
 
-    @AfterTest
-    public void tearDown() {
+    @AfterAll
+    public static void tearDown() {
         http3TestServer.stop();
     }
 
@@ -272,7 +273,7 @@ public class H3HeadersEncoding {
     }
 
 
-    private class HeadersHandler implements HttpTestHandler {
+    private static class HeadersHandler implements HttpTestHandler {
         @Override
         public void handle(HttpTestExchange t) throws IOException {
 
diff --git a/test/jdk/java/net/httpclient/http3/H3ImplicitPushCancel.java b/test/jdk/java/net/httpclient/http3/H3ImplicitPushCancel.java
index 130ccd40cd6..570f84ad620 100644
--- a/test/jdk/java/net/httpclient/http3/H3ImplicitPushCancel.java
+++ b/test/jdk/java/net/httpclient/http3/H3ImplicitPushCancel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
  * @test
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm
+ * @run junit/othervm
  *      -Djdk.internal.httpclient.debug=true
  *      -Djdk.httpclient.HttpClient.log=errors,requests,responses,trace
  *      H3ImplicitPushCancel
@@ -56,17 +56,18 @@ import java.util.concurrent.ConcurrentMap;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.internal.net.http.common.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpOption.Http3DiscoveryMode.ANY;
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.testng.Assert.assertEquals;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 public class H3ImplicitPushCancel implements HttpServerAdapters {
 
-    static Map<String,String> PUSH_PROMISES = Map.of(
+    static final Map<String,String> PUSH_PROMISES = Map.of(
             "/x/y/z/1", "the first push promise body",
             "/x/y/z/2", "the second push promise body",
             "/x/y/z/3", "the third push promise body",
@@ -79,12 +80,12 @@ public class H3ImplicitPushCancel implements HttpServerAdapters {
     );
     static final String MAIN_RESPONSE_BODY = "the main response body";
 
-    HttpTestServer  server;
-    URI uri;
-    URI headURI;
+    private static HttpTestServer server;
+    private static URI uri;
+    private static URI headURI;
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         server = HttpTestServer.create(ANY, SimpleSSLContext.findSSLContext());
         HttpTestHandler pushHandler = new ServerPushHandler(MAIN_RESPONSE_BODY,
                                                      PUSH_PROMISES);
@@ -96,14 +97,14 @@ public class H3ImplicitPushCancel implements HttpServerAdapters {
         headURI = new URI("https://" + server.serverAuthority() + "/head/x");
     }
 
-    @AfterTest
-    public void teardown() {
+    @AfterAll
+    public static void teardown() {
         server.stop();
     }
 
     static <T> HttpResponse<T> assert200ResponseCode(HttpResponse<T> response) {
-        assertEquals(response.statusCode(), 200);
-        assertEquals(response.version(), Version.HTTP_3);
+        assertEquals(200, response.statusCode());
+        assertEquals(Version.HTTP_3, response.version());
         return response;
     }
 
@@ -111,8 +112,8 @@ public class H3ImplicitPushCancel implements HttpServerAdapters {
         HttpRequest headRequest = HttpRequest.newBuilder(headURI)
                 .HEAD().version(Version.HTTP_2).build();
         var headResponse = client.send(headRequest, BodyHandlers.ofString());
-        assertEquals(headResponse.statusCode(), 200);
-        assertEquals(headResponse.version(), Version.HTTP_2);
+        assertEquals(200, headResponse.statusCode());
+        assertEquals(Version.HTTP_2, headResponse.version());
     }
 
     /*
@@ -136,7 +137,7 @@ public class H3ImplicitPushCancel implements HttpServerAdapters {
                                 .build(), BodyHandlers.ofString())
                         .thenApply(H3ImplicitPushCancel::assert200ResponseCode)
                         .thenApply(HttpResponse::body)
-                        .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                        .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                         .join();
                 System.out.println("Got result before error was raised");
                 throw new AssertionError("should have failed");
@@ -171,14 +172,14 @@ public class H3ImplicitPushCancel implements HttpServerAdapters {
             promises.putIfAbsent(main.request(), CompletableFuture.completedFuture(main));
             promises.forEach((request, value) -> {
                 HttpResponse<String> response = value.join();
-                assertEquals(response.statusCode(), 200);
+                assertEquals(200, response.statusCode());
                 if (PUSH_PROMISES.containsKey(request.uri().getPath())) {
-                    assertEquals(response.body(), PUSH_PROMISES.get(request.uri().getPath()));
+                    assertEquals(PUSH_PROMISES.get(request.uri().getPath()), response.body());
                 } else {
-                    assertEquals(response.body(), MAIN_RESPONSE_BODY);
+                    assertEquals(MAIN_RESPONSE_BODY, response.body());
                 }
             });
-            assertEquals(promises.size(), PUSH_PROMISES.size() + 1);
+            assertEquals(PUSH_PROMISES.size() + 1, promises.size());
 
             promises.clear();
 
@@ -187,13 +188,13 @@ public class H3ImplicitPushCancel implements HttpServerAdapters {
                 client.sendAsync(HttpRequest.newBuilder(uri).build(), BodyHandlers.ofString())
                         .thenApply(H3ImplicitPushCancel::assert200ResponseCode)
                         .thenApply(HttpResponse::body)
-                        .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                        .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                         .join();
             } catch (CompletionException c) {
                 throw new AssertionError(c.getCause());
             }
 
-            assertEquals(promises.size(), 0);
+            assertEquals(0, promises.size());
         }
     }
 
diff --git a/test/jdk/java/net/httpclient/http3/H3InsertionsLimitTest.java b/test/jdk/java/net/httpclient/http3/H3InsertionsLimitTest.java
index ff38cd4fa98..6eabc23677a 100644
--- a/test/jdk/java/net/httpclient/http3/H3InsertionsLimitTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3InsertionsLimitTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,13 +27,8 @@ import jdk.httpclient.test.lib.quic.QuicServer;
 import jdk.internal.net.http.http3.ConnectionSettings;
 import jdk.internal.net.http.qpack.Encoder;
 import jdk.internal.net.http.qpack.TableEntry;
-import jdk.test.lib.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.net.URIBuilder;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -44,12 +39,16 @@ import java.net.http.HttpClient;
 import java.net.http.HttpClient.Version;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse.BodyHandlers;
-import java.time.Duration;
 import java.util.concurrent.CountDownLatch;
 
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
 /*
  * @test
  * @summary Verifies that the HTTP client respects the maxLiteralWithIndexing
@@ -59,7 +58,7 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
  * @build java.net.http/jdk.internal.net.http.Http3ConnectionAccess
- * @run testng/othervm -Djdk.httpclient.qpack.encoderTableCapacityLimit=4096
+ * @run junit/othervm -Djdk.httpclient.qpack.encoderTableCapacityLimit=4096
  *                     -Djdk.internal.httpclient.qpack.allowBlockingEncoding=true
  *                     -Djdk.httpclient.qpack.decoderMaxTableCapacity=4096
  *                     -Djdk.httpclient.qpack.decoderBlockedStreams=1024
@@ -75,8 +74,8 @@ public class H3InsertionsLimitTest implements HttpServerAdapters {
     private static final long HEADER_SIZE_LIMIT_BYTES = 8192;
     private static final long MAX_SERVER_DT_CAPACITY = 4096;
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    private HttpTestServer h3Server;
-    private String requestURIBase;
+    private static HttpTestServer h3Server;
+    private static String requestURIBase;
     public static final long MAX_LITERALS_WITH_INDEXING = 32L;
     private static final CountDownLatch WAIT_FOR_FAILURE = new CountDownLatch(1);
 
@@ -120,8 +119,8 @@ public class H3InsertionsLimitTest implements HttpServerAdapters {
         exchange.sendResponseHeaders(200, 0);
     }
 
-    @BeforeClass
-    public void beforeClass() throws Exception {
+    @BeforeAll
+    public static void beforeClass() throws Exception {
         final QuicServer quicServer = Http3TestServer.quicServerBuilder()
                 .bindAddress(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0))
                 .sslContext(sslContext)
@@ -138,8 +137,8 @@ public class H3InsertionsLimitTest implements HttpServerAdapters {
                 .port(h3Server.getAddress().getPort()).build().toString();
     }
 
-    @AfterClass
-    public void afterClass() throws Exception {
+    @AfterAll
+    public static void afterClass() throws Exception {
         if (h3Server != null) {
             System.out.println("Stopping server " + h3Server.getAddress());
             h3Server.stop();
@@ -161,10 +160,10 @@ public class H3InsertionsLimitTest implements HttpServerAdapters {
         System.out.println("Issuing request to " + reqURI);
         try {
             client.send(request, BodyHandlers.discarding());
-            Assert.fail("IOException expected");
+            Assertions.fail("IOException expected");
         } catch (IOException ioe) {
             System.out.println("Got IOException: " + ioe);
-            Assert.assertTrue(ioe.getMessage()
+            Assertions.assertTrue(ioe.getMessage()
                                  .contains("Too many literal with indexing"));
         } finally {
             WAIT_FOR_FAILURE.countDown();
diff --git a/test/jdk/java/net/httpclient/http3/H3LogHandshakeErrors.java b/test/jdk/java/net/httpclient/http3/H3LogHandshakeErrors.java
index f7a258c069c..85a4b6113f0 100644
--- a/test/jdk/java/net/httpclient/http3/H3LogHandshakeErrors.java
+++ b/test/jdk/java/net/httpclient/http3/H3LogHandshakeErrors.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2025, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,10 +24,8 @@
 import java.io.IOException;
 import java.net.BindException;
 import java.net.ServerSocket;
-import java.net.Socket;
 import java.net.URI;
 import java.net.http.HttpClient;
-import java.net.http.HttpOption;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
 import java.net.http.HttpResponse.BodyHandlers;
@@ -44,16 +42,16 @@ import javax.net.ssl.SSLContext;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.internal.net.http.quic.QuicConnectionImpl;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Builder.NO_PROXY;
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
-import static org.testng.Assert.*;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 /*
  * @test
@@ -63,7 +61,7 @@ import static org.testng.Assert.*;
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
- * @run testng/othervm
+ * @run junit/othervm
  *              -Djdk.httpclient.HttpClient.log=errors
  *              H3LogHandshakeErrors
  */
@@ -71,14 +69,14 @@ import static org.testng.Assert.*;
 public class H3LogHandshakeErrors implements HttpServerAdapters {
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    private HttpTestServer h3Server;
-    private ServerSocket tcpServerSocket = null;
-    private Thread tcpServerThread = null;
-    private String requestURI;
+    private static HttpTestServer h3Server;
+    private static ServerSocket tcpServerSocket = null;
+    private static Thread tcpServerThread = null;
+    private static String requestURI;
     private static Logger clientLogger;
 
-    @BeforeClass
-    public void beforeClass() throws Exception {
+    @BeforeAll
+    public static void beforeClass() throws Exception {
         // create an H3 only server
         h3Server = HttpTestServer.create(HTTP_3_URI_ONLY, sslContext);
         h3Server.addHandler((exchange) -> exchange.sendResponseHeaders(200, 0), "/hello");
@@ -113,8 +111,8 @@ public class H3LogHandshakeErrors implements HttpServerAdapters {
         }
     }
 
-    @AfterClass
-    public void afterClass() throws Exception {
+    @AfterAll
+    public static void afterClass() throws Exception {
         if (h3Server != null) {
             System.out.println("Stopping server " + h3Server.getAddress());
             h3Server.stop();
diff --git a/test/jdk/java/net/httpclient/http3/H3MemoryHandlingTest.java b/test/jdk/java/net/httpclient/http3/H3MemoryHandlingTest.java
index c9474be51c2..2fcb7388f7b 100644
--- a/test/jdk/java/net/httpclient/http3/H3MemoryHandlingTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3MemoryHandlingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -30,9 +30,6 @@ import jdk.internal.net.http.quic.streams.QuicBidiStream;
 import jdk.internal.net.quic.QuicVersion;
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.net.URIBuilder;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -52,7 +49,11 @@ import java.util.concurrent.TimeUnit;
 
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
-import static org.testng.Assert.*;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 /*
  * @test
@@ -62,7 +63,7 @@ import static org.testng.Assert.*;
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
  * @build java.net.http/jdk.internal.net.http.Http3ConnectionAccess
- * @run testng/othervm
+ * @run junit/othervm
  *              -Djdk.internal.httpclient.debug=true
  *              -Djdk.httpclient.HttpClient.log=requests,responses,errors
  *              -Djdk.httpclient.quic.maxStreamInitialData=16384
@@ -71,11 +72,11 @@ import static org.testng.Assert.*;
 public class H3MemoryHandlingTest implements HttpServerAdapters {
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    private QuicStandaloneServer server;
-    private String requestURIBase;
+    private static QuicStandaloneServer server;
+    private static String requestURIBase;
 
-    @BeforeClass
-    public void beforeClass() throws Exception {
+    @BeforeAll
+    public static void beforeClass() throws Exception {
         server = QuicStandaloneServer.newBuilder()
                 .availableVersions(new QuicVersion[]{QuicVersion.QUIC_V1})
                 .sslContext(sslContext)
@@ -87,8 +88,8 @@ public class H3MemoryHandlingTest implements HttpServerAdapters {
                 .port(server.getAddress().getPort()).build().toString();
     }
 
-    @AfterClass
-    public void afterClass() throws Exception {
+    @AfterAll
+    public static void afterClass() throws Exception {
         if (server != null) {
             System.out.println("Stopping server " + server.getAddress());
             server.close();
@@ -125,19 +126,16 @@ public class H3MemoryHandlingTest implements HttpServerAdapters {
                 serverAllWritesDone.complete(false);
             }
         });
-        HttpClient client = getHttpClient();
-        try {
+        try (HttpClient client = getHttpClient()) {
             HttpRequest request = getRequest();
             final HttpResponse<InputStream> response1 = client.send(
                     request, BodyHandlers.ofInputStream());
-            assertEquals(response1.statusCode(), 200);
+            assertEquals(200, response1.statusCode());
             assertFalse(errorCF.isDone(), "Expected the connection to be open");
             assertFalse(serverAllWritesDone.isDone());
             response1.body().close();
             final boolean done = serverAllWritesDone.get(10, TimeUnit.SECONDS);
             assertFalse(done, "Too much data was buffered by the client");
-        } finally {
-            client.close();
         }
     }
 
@@ -176,12 +174,12 @@ public class H3MemoryHandlingTest implements HttpServerAdapters {
                 handlerCF.completeExceptionally(e);
             }
         });
-        HttpClient client = getHttpClient();
-        try {
+
+        try (HttpClient client = getHttpClient()) {
             HttpRequest request = getRequest();
             final HttpResponse<InputStream> response1 = client.send(
-                            request, BodyHandlers.ofInputStream());
-            assertEquals(response1.statusCode(), 200);
+                    request, BodyHandlers.ofInputStream());
+            assertEquals(200, response1.statusCode());
             assertFalse(errorCF.isDone(), "Expected the connection to be open");
             assertFalse(handlerCF.isDone());
             assertTrue(writerBlocked.await(10, TimeUnit.SECONDS),
@@ -191,10 +189,8 @@ public class H3MemoryHandlingTest implements HttpServerAdapters {
             try (InputStream body = response1.body()) {
                 receivedResponse = body.readAllBytes();
             }
-            assertEquals(receivedResponse.length, 32768,
+            assertEquals(32768, receivedResponse.length,
                     "Unexpected response length");
-        } finally {
-            client.close();
         }
         assertTrue(handlerCF.get(10, TimeUnit.SECONDS),
                 "Unexpected result");
diff --git a/test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java b/test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java
index 14149da7815..67ac821b6f7 100644
--- a/test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java
+++ b/test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,7 +29,7 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.httpclient.quic.minPtoBackoffTime=60
  *                     -Djdk.httpclient.quic.maxPtoBackoffTime=90
  *                     -Djdk.httpclient.quic.maxPtoBackoff=10
@@ -52,7 +52,7 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.httpclient.quic.minPtoBackoffTime=45
  *                     -Djdk.httpclient.quic.maxPtoBackoffTime=60
  *                     -Djdk.httpclient.quic.maxPtoBackoff=9
@@ -75,7 +75,7 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.httpclient.quic.idleTimeout=120
  *                     -Djdk.httpclient.keepalive.timeout.h3=120
  *                     -Djdk.test.server.quic.idleTimeout=90
@@ -100,7 +100,7 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=360 -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.httpclient.quic.idleTimeout=120
  *                     -Djdk.httpclient.keepalive.timeout.h3=120
  *                     -Djdk.test.server.quic.idleTimeout=90
@@ -161,14 +161,15 @@ import javax.net.ssl.SSLContext;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.internal.net.http.common.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.Assert;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 import static jdk.internal.net.http.Http3ClientProperties.MAX_STREAM_LIMIT_WAIT_TIMEOUT;
 
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
 public class H3MultipleConnectionsToSameHost implements HttpServerAdapters {
     static HttpTestServer httpsServer;
     static HttpClient client = null;
@@ -223,11 +224,11 @@ public class H3MultipleConnectionsToSameHost implements HttpServerAdapters {
     }
 
     public static void main(String[] args) throws Exception {
-        test();
+        new H3MultipleConnectionsToSameHost().test();
     }
 
     @Test
-    public static void test() throws Exception {
+    public void test() throws Exception {
         try {
             long prestart = System.nanoTime();
             initialize();
@@ -244,7 +245,7 @@ public class H3MultipleConnectionsToSameHost implements HttpServerAdapters {
                     .GET().build();
             long start = System.nanoTime();
             var resp = client.send(request, BodyHandlers.ofByteArrayConsumer(b-> {}));
-            Assert.assertEquals(resp.statusCode(), 200);
+            Assertions.assertEquals(200, resp.statusCode());
             long elapsed = System.nanoTime() - start;
             System.out.println("First request took: " + elapsed + " nanos (" + TimeUnit.NANOSECONDS.toMillis(elapsed) + " ms)");
             final int max = property("simpleget.requests", 50);
@@ -298,7 +299,7 @@ public class H3MultipleConnectionsToSameHost implements HttpServerAdapters {
 
                 }
             }
-            list.forEach((cf) -> Assert.assertEquals(cf.join().statusCode(), 200));
+            list.forEach((cf) -> Assertions.assertEquals(200, cf.join().statusCode()));
             client.close();
         } catch (Throwable tt) {
             System.err.println("tt caught");
diff --git a/test/jdk/java/net/httpclient/http3/H3PushCancel.java b/test/jdk/java/net/httpclient/http3/H3PushCancel.java
index 324942b67d0..b9e15b7d8e5 100644
--- a/test/jdk/java/net/httpclient/http3/H3PushCancel.java
+++ b/test/jdk/java/net/httpclient/http3/H3PushCancel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
  * @test
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm
+ * @run junit/othervm
  *      -Djdk.internal.httpclient.debug=true
  *      -Djdk.httpclient.HttpClient.log=errors,requests,responses,trace
  *      -Djdk.httpclient.http3.maxConcurrentPushStreams=5
@@ -69,18 +69,19 @@ import java.util.function.Function;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.internal.net.http.common.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpOption.Http3DiscoveryMode.ANY;
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertTrue;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 public class H3PushCancel implements HttpServerAdapters {
 
-    static Map<String,String> PUSH_PROMISES = Map.of(
+    static final Map<String,String> PUSH_PROMISES = Map.of(
             "/x/y/z/1", "the first push promise body",
             "/x/y/z/2", "the second push promise body",
             "/x/y/z/3", "the third push promise body",
@@ -93,13 +94,13 @@ public class H3PushCancel implements HttpServerAdapters {
     );
     static final String MAIN_RESPONSE_BODY = "the main response body";
 
-    HttpTestServer  server;
-    URI uri;
-    URI headURI;
-    ServerPushHandler pushHandler;
+    private static HttpTestServer server;
+    private static URI uri;
+    private static URI headURI;
+    private static ServerPushHandler pushHandler;
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         server = HttpTestServer.create(ANY, SimpleSSLContext.findSSLContext());
         pushHandler = new ServerPushHandler(MAIN_RESPONSE_BODY, PUSH_PROMISES);
         server.addHandler(pushHandler, "/push/");
@@ -110,14 +111,14 @@ public class H3PushCancel implements HttpServerAdapters {
         headURI = new URI("https://" + server.serverAuthority() + "/head/x");
     }
 
-    @AfterTest
-    public void teardown() {
+    @AfterAll
+    public static void teardown() {
         server.stop();
     }
 
     static <T> HttpResponse<T> assert200ResponseCode(HttpResponse<T> response) {
-        assertEquals(response.statusCode(), 200);
-        assertEquals(response.version(), Version.HTTP_3);
+        assertEquals(200, response.statusCode());
+        assertEquals(Version.HTTP_3, response.version());
         return response;
     }
 
@@ -125,8 +126,8 @@ public class H3PushCancel implements HttpServerAdapters {
         HttpRequest headRequest = HttpRequest.newBuilder(headURI)
                 .HEAD().version(Version.HTTP_2).build();
         var headResponse = client.send(headRequest, BodyHandlers.ofString());
-        assertEquals(headResponse.statusCode(), 200);
-        assertEquals(headResponse.version(), Version.HTTP_2);
+        assertEquals(200, headResponse.statusCode());
+        assertEquals(Version.HTTP_2, headResponse.version());
     }
 
     @Test
@@ -173,14 +174,14 @@ public class H3PushCancel implements HttpServerAdapters {
                     promises.putIfAbsent(main.request(), CompletableFuture.completedFuture(main));
                     promises.forEach((request, value) -> {
                         HttpResponse<String> response = value.join();
-                        assertEquals(response.statusCode(), 200);
+                        assertEquals(200, response.statusCode());
                         if (PUSH_PROMISES.containsKey(request.uri().getPath())) {
-                            assertEquals(response.body(), PUSH_PROMISES.get(request.uri().getPath()));
+                            assertEquals(PUSH_PROMISES.get(request.uri().getPath()), response.body());
                         } else {
-                            assertEquals(response.body(), MAIN_RESPONSE_BODY);
+                            assertEquals(MAIN_RESPONSE_BODY, response.body());
                         }
                     });
-                    assertEquals(promises.size(), Math.min(PUSH_PROMISES.size(), maxPushes) + 1);
+                    assertEquals(Math.min(PUSH_PROMISES.size(), maxPushes) + 1, promises.size());
 
                     promises.clear();
                 }
@@ -190,12 +191,12 @@ public class H3PushCancel implements HttpServerAdapters {
                     client.sendAsync(HttpRequest.newBuilder(uri).build(), BodyHandlers.ofString())
                             .thenApply(H3PushCancel::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                 } catch (CompletionException c) {
                     throw new AssertionError(c.getCause());
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // Send with no promise handler, but use pushId bigger than allowed.
                 // This should cause the connection to get closed
@@ -207,7 +208,7 @@ public class H3PushCancel implements HttpServerAdapters {
                     client.sendAsync(bigger, BodyHandlers.ofString())
                             .thenApply(H3PushCancel::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                     throw new AssertionError("Expected IOException not thrown");
                 } catch (CompletionException c) {
@@ -226,7 +227,7 @@ public class H3PushCancel implements HttpServerAdapters {
                         throw new AssertionError("Unexpected exception: " + c.getCause(), c.getCause());
                     }
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // the next time around we should have a new connection
                 // so we can restart from scratch
@@ -315,16 +316,16 @@ public class H3PushCancel implements HttpServerAdapters {
                     promises.putIfAbsent(main.request(), CompletableFuture.completedFuture(main));
                     promises.forEach((request, value) -> {
                         HttpResponse<String> response = value.join();
-                        assertEquals(response.statusCode(), 200);
+                        assertEquals(200, response.statusCode());
                         if (PUSH_PROMISES.containsKey(request.uri().getPath())) {
-                            assertEquals(response.body(), PUSH_PROMISES.get(request.uri().getPath()));
+                            assertEquals(PUSH_PROMISES.get(request.uri().getPath()), response.body());
                         } else {
-                            assertEquals(response.body(), MAIN_RESPONSE_BODY);
+                            assertEquals(MAIN_RESPONSE_BODY, response.body());
                         }
                     });
                     int expectedPushes = Math.min(PUSH_PROMISES.size(), maxPushes) + 1;
                     if (i == 0) expectedPushes--; // pushId == 1 was cancelled
-                    assertEquals(promises.size(), expectedPushes);
+                    assertEquals(expectedPushes, promises.size());
 
                     promises.clear();
                 }
@@ -334,12 +335,12 @@ public class H3PushCancel implements HttpServerAdapters {
                     client.sendAsync(HttpRequest.newBuilder(uri).build(), BodyHandlers.ofString())
                             .thenApply(H3PushCancel::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                 } catch (CompletionException c) {
                     throw new AssertionError(c.getCause());
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // Send with no promise handler, but use pushId bigger than allowed.
                 // This should cause the connection to get closed
@@ -351,7 +352,7 @@ public class H3PushCancel implements HttpServerAdapters {
                     client.sendAsync(bigger, BodyHandlers.ofString())
                             .thenApply(H3PushCancel::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body ->assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body ->assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                     throw new AssertionError("Expected IOException not thrown");
                 } catch (CompletionException c) {
@@ -370,7 +371,7 @@ public class H3PushCancel implements HttpServerAdapters {
                         throw new AssertionError("Unexpected exception: " + c.getCause(), c.getCause());
                     }
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // the next time around we should have a new connection
                 // so we can restart from scratch
@@ -379,7 +380,7 @@ public class H3PushCancel implements HttpServerAdapters {
             errors.forEach(t -> t.printStackTrace(System.out));
             var error = errors.stream().findFirst().orElse(null);
             if (error != null) throw error;
-            assertEquals(notified.size(), 0, "Unexpected notification: " + notified);
+            assertEquals(0, notified.size(), "Unexpected notification: " + notified);
         }
     }
 
diff --git a/test/jdk/java/net/httpclient/http3/H3RedirectTest.java b/test/jdk/java/net/httpclient/http3/H3RedirectTest.java
index 0a5546bc1c1..67a7d99fa71 100644
--- a/test/jdk/java/net/httpclient/http3/H3RedirectTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3RedirectTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -28,7 +28,7 @@
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
  * @compile ../ReferenceTracker.java
- * @run testng/othervm
+ * @run junit/othervm
  *      -Djdk.httpclient.HttpClient.log=frames,ssl,requests,responses,errors
  *      -Djdk.internal.httpclient.debug=true
  *      H3RedirectTest
@@ -50,11 +50,12 @@ import javax.net.ssl.SSLContext;
 
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.Test;
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.Test;
+
 public class H3RedirectTest implements HttpServerAdapters {
     static int httpPort;
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
@@ -135,7 +136,7 @@ public class H3RedirectTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void test() throws Exception {
+    public void test() throws Exception {
         try {
             initialize();
             simpleTest();
diff --git a/test/jdk/java/net/httpclient/http3/H3ServerPush.java b/test/jdk/java/net/httpclient/http3/H3ServerPush.java
index 83f68a15579..50aa817b155 100644
--- a/test/jdk/java/net/httpclient/http3/H3ServerPush.java
+++ b/test/jdk/java/net/httpclient/http3/H3ServerPush.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,7 +29,7 @@
  *        jdk.httpclient.test.lib.http2.PushHandler
  *        jdk.test.lib.Utils
  *        jdk.test.lib.net.SimpleSSLContext
- * @run testng/othervm/timeout=960
+ * @run junit/othervm/timeout=960
  *      -Djdk.httpclient.HttpClient.log=errors,requests,headers
  *      -Djdk.internal.httpclient.debug=false
  *      H3ServerPush
@@ -66,13 +66,14 @@ import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.httpclient.test.lib.http2.Http2TestServer;
 import jdk.httpclient.test.lib.http2.PushHandler;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.Test;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static jdk.test.lib.Utils.createTempFileOfSize;
-import static org.testng.Assert.assertEquals;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 public class H3ServerPush implements HttpServerAdapters {
 
@@ -81,14 +82,14 @@ public class H3ServerPush implements HttpServerAdapters {
     static final int LOOPS = 13;
     static final int FILE_SIZE = 512 * 1024 + 343;
 
-    static Path tempFile;
+    private static Path tempFile;
 
-    HttpTestServer server;
-    URI uri;
-    URI headURI;
+    private static HttpTestServer server;
+    private static URI uri;
+    private static URI headURI;
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         tempFile = createTempFileOfSize(CLASS_NAME, ".dat", FILE_SIZE);
         var sslContext = SimpleSSLContext.findSSLContext();
         var h2Server = new Http2TestServer(true, sslContext);
@@ -109,12 +110,12 @@ public class H3ServerPush implements HttpServerAdapters {
         HttpRequest headRequest = HttpRequest.newBuilder(headURI)
                 .HEAD().version(Version.HTTP_2).build();
         var headResponse = client.send(headRequest, BodyHandlers.ofString());
-        assertEquals(headResponse.statusCode(), 200);
-        assertEquals(headResponse.version(), Version.HTTP_2);
+        assertEquals(200, headResponse.statusCode());
+        assertEquals(Version.HTTP_2, headResponse.version());
     }
 
-    @AfterTest
-    public void teardown() {
+    @AfterAll
+    public static void teardown() {
         server.stop();
     }
 
@@ -144,7 +145,7 @@ public class H3ServerPush implements HttpServerAdapters {
             resultMap.put(request, cf);
             System.out.println("waiting for response");
             var resp = cf.join();
-            assertEquals(resp.version(), Version.HTTP_3);
+            assertEquals(Version.HTTP_3, resp.version());
             var seen = new HashSet<>();
             resultMap.forEach((k, v) -> {
                 if (seen.add(k)) {
@@ -158,16 +159,16 @@ public class H3ServerPush implements HttpServerAdapters {
             for (HttpRequest r : resultMap.keySet()) {
                 System.out.println("Checking " + r);
                 HttpResponse<String> response = resultMap.get(r).join();
-                assertEquals(response.statusCode(), 200);
-                assertEquals(response.version(), Version.HTTP_3);
-                assertEquals(response.body(), tempFileAsString);
+                assertEquals(200, response.statusCode());
+                assertEquals(Version.HTTP_3, response.version());
+                assertEquals(tempFileAsString, response.body());
             }
             resultMap.forEach((k, v) -> {
                 if (seen.add(k)) {
                     System.out.println("Got " + v.join());
                 }
             });
-            assertEquals(resultMap.size(), LOOPS + 1);
+            assertEquals(LOOPS + 1, resultMap.size());
         }
     }
 
@@ -194,11 +195,11 @@ public class H3ServerPush implements HttpServerAdapters {
             System.err.println("results.size: " + resultMap.size());
             for (HttpRequest r : resultMap.keySet()) {
                 HttpResponse<String> response = resultMap.get(r).join();
-                assertEquals(response.statusCode(), 200);
-                assertEquals(response.version(), Version.HTTP_3);
-                assertEquals(response.body(), tempFileAsString);
+                assertEquals(200, response.statusCode());
+                assertEquals(Version.HTTP_3, response.version());
+                assertEquals(tempFileAsString, response.body());
             }
-            assertEquals(resultMap.size(), LOOPS + 1);
+            assertEquals(LOOPS + 1, resultMap.size());
         }
     }
 
@@ -242,12 +243,12 @@ public class H3ServerPush implements HttpServerAdapters {
             resultsMap.put(request, cf);
             for (HttpRequest r : resultsMap.keySet()) {
                 HttpResponse<Path> response = resultsMap.get(r).join();
-                assertEquals(response.statusCode(), 200);
-                assertEquals(response.version(), Version.HTTP_3);
+                assertEquals(200, response.statusCode());
+                assertEquals(Version.HTTP_3, response.version());
                 String fileAsString = Files.readString(response.body());
-                assertEquals(fileAsString, tempFileAsString);
+                assertEquals(tempFileAsString, fileAsString);
             }
-            assertEquals(resultsMap.size(), LOOPS + 1);
+            assertEquals(LOOPS + 1, resultsMap.size());
         }
     }
 
@@ -274,12 +275,12 @@ public class H3ServerPush implements HttpServerAdapters {
             resultsMap.put(request, cf);
             for (HttpRequest r : resultsMap.keySet()) {
                 HttpResponse<Path> response = resultsMap.get(r).join();
-                assertEquals(response.statusCode(), 200);
-                assertEquals(response.version(), Version.HTTP_3);
+                assertEquals(200, response.statusCode());
+                assertEquals(Version.HTTP_3, response.version());
                 String fileAsString = Files.readString(response.body());
-                assertEquals(fileAsString, tempFileAsString);
+                assertEquals(tempFileAsString, fileAsString);
             }
-            assertEquals(resultsMap.size(), LOOPS + 1);
+            assertEquals(LOOPS + 1, resultsMap.size());
         }
     }
 
@@ -340,13 +341,13 @@ public class H3ServerPush implements HttpServerAdapters {
             resultsMap.put(request, cf);
             for (HttpRequest r : resultsMap.keySet()) {
                 HttpResponse<Void> response = resultsMap.get(r).join();
-                assertEquals(response.statusCode(), 200);
-                assertEquals(response.version(), Version.HTTP_3);
+                assertEquals(200, response.statusCode());
+                assertEquals(Version.HTTP_3, response.version());
                 byte[] ba = byteArrayConsumerMap.get(r).getAccumulatedBytes();
                 String result = new String(ba, UTF_8);
-                assertEquals(result, tempFileAsString);
+                assertEquals(tempFileAsString, result);
             }
-            assertEquals(resultsMap.size(), LOOPS + 1);
+            assertEquals(LOOPS + 1, resultsMap.size());
         }
     }
 
@@ -384,13 +385,13 @@ public class H3ServerPush implements HttpServerAdapters {
             resultsMap.put(request, cf);
             for (HttpRequest r : resultsMap.keySet()) {
                 HttpResponse<Void> response = resultsMap.get(r).join();
-                assertEquals(response.statusCode(), 200);
-                assertEquals(response.version(), Version.HTTP_3);
+                assertEquals(200, response.statusCode());
+                assertEquals(Version.HTTP_3, response.version());
                 byte[] ba = byteArrayConsumerMap.get(r).getAccumulatedBytes();
                 String result = new String(ba, UTF_8);
-                assertEquals(result, tempFileAsString);
+                assertEquals(tempFileAsString, result);
             }
-            assertEquals(resultsMap.size(), LOOPS + 1);
+            assertEquals(LOOPS + 1, resultsMap.size());
         }
     }
 }
diff --git a/test/jdk/java/net/httpclient/http3/H3ServerPushCancel.java b/test/jdk/java/net/httpclient/http3/H3ServerPushCancel.java
index 312b9ac507d..b34e2a1567e 100644
--- a/test/jdk/java/net/httpclient/http3/H3ServerPushCancel.java
+++ b/test/jdk/java/net/httpclient/http3/H3ServerPushCancel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
  * @test
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm
+ * @run junit/othervm
  *      -Djdk.internal.httpclient.debug=true
  *      -Djdk.httpclient.HttpClient.log=errors,requests,responses,trace
  *      -Djdk.httpclient.http3.maxConcurrentPushStreams=45
@@ -73,9 +73,6 @@ import java.util.function.Supplier;
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.internal.net.http.common.Utils;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Version.HTTP_2;
 import static java.net.http.HttpClient.Version.HTTP_3;
@@ -83,10 +80,14 @@ import static java.net.http.HttpOption.Http3DiscoveryMode.ALT_SVC;
 import static java.net.http.HttpOption.Http3DiscoveryMode.ANY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertNotNull;
-import static org.testng.Assert.assertNull;
-import static org.testng.Assert.assertTrue;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 public class H3ServerPushCancel implements HttpServerAdapters {
 
@@ -95,7 +96,7 @@ public class H3ServerPushCancel implements HttpServerAdapters {
     static final PrintStream err = System.err;
     static final PrintStream out = System.out;
 
-    static Map<String,String> PUSH_PROMISES = Map.of(
+    static final Map<String,String> PUSH_PROMISES = Map.of(
             "/x/y/z/1", "the first push promise body",
             "/x/y/z/2", "the second push promise body",
             "/x/y/z/3", "the third push promise body",
@@ -109,13 +110,13 @@ public class H3ServerPushCancel implements HttpServerAdapters {
     static final String MAIN_RESPONSE_BODY = "the main response body";
     static final int REQUESTS = 5;
 
-    HttpTestServer  server;
-    URI uri;
-    URI headURI;
-    ServerPushHandler pushHandler;
+    private static HttpTestServer server;
+    private static URI uri;
+    private static URI headURI;
+    private static ServerPushHandler pushHandler;
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         server = HttpTestServer.create(ANY, SimpleSSLContext.findSSLContext());
         pushHandler = new ServerPushHandler(MAIN_RESPONSE_BODY, PUSH_PROMISES);
         server.addHandler(pushHandler, "/push/");
@@ -126,14 +127,14 @@ public class H3ServerPushCancel implements HttpServerAdapters {
         headURI = new URI("https://" + server.serverAuthority() + "/head/x");
     }
 
-    @AfterTest
-    public void teardown() {
+    @AfterAll
+    public static void teardown() {
         server.stop();
     }
 
     static <T> HttpResponse<T> assert200ResponseCode(HttpResponse<T> response) {
-        assertEquals(response.statusCode(), 200);
-        assertEquals(response.version(), HTTP_3);
+        assertEquals(200, response.statusCode());
+        assertEquals(HTTP_3, response.version());
         return response;
     }
 
@@ -141,8 +142,8 @@ public class H3ServerPushCancel implements HttpServerAdapters {
         HttpRequest headRequest = HttpRequest.newBuilder(headURI)
                 .HEAD().version(HTTP_2).build();
         var headResponse = client.send(headRequest, BodyHandlers.ofString());
-        assertEquals(headResponse.statusCode(), 200);
-        assertEquals(headResponse.version(), HTTP_2);
+        assertEquals(200, headResponse.statusCode());
+        assertEquals(HTTP_2, headResponse.version());
     }
 
     static final class TestPushPromiseHandler<T> implements PushPromiseHandler<T> {
@@ -283,14 +284,14 @@ public class H3ServerPushCancel implements HttpServerAdapters {
                                     throw new AssertionError("Unexpected message: " + msg, ex);
                                 }
                             } else {
-                                assertEquals(join(value).body(), PUSH_PROMISES.get(request.uri().getPath()));
+                                assertEquals(PUSH_PROMISES.get(request.uri().getPath()), join(value).body());
                             }
                             expectedPushIds.add(pushId);
-                        } else assertEquals(pushId.getClass(), Http3PushId.class);
+                        } else assertEquals(Http3PushId.class, pushId.getClass());
                     } else {
                         HttpResponse<String> response = join(value);
-                        assertEquals(response.statusCode(), 200);
-                        assertEquals(response.body(), MAIN_RESPONSE_BODY);
+                        assertEquals(200, response.statusCode());
+                        assertEquals(MAIN_RESPONSE_BODY, response.body());
                     }
                 });
 
@@ -311,12 +312,12 @@ public class H3ServerPushCancel implements HttpServerAdapters {
                     client.sendAsync(HttpRequest.newBuilder(uri).build(), BodyHandlers.ofString())
                             .thenApply(H3ServerPushCancel::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                 } catch (CompletionException c) {
                     throw new AssertionError(c.getCause());
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // Send with no promise handler, but use pushId bigger than allowed.
                 // This should cause the connection to get closed
@@ -328,7 +329,7 @@ public class H3ServerPushCancel implements HttpServerAdapters {
                     client.sendAsync(bigger, BodyHandlers.ofString())
                             .thenApply(H3ServerPushCancel::assert200ResponseCode)
                             .thenApply(HttpResponse::body)
-                            .thenAccept(body -> assertEquals(body, MAIN_RESPONSE_BODY))
+                            .thenAccept(body -> assertEquals(MAIN_RESPONSE_BODY, body))
                             .join();
                     throw new AssertionError("Expected IOException not thrown");
                 } catch (CompletionException c) {
@@ -347,7 +348,7 @@ public class H3ServerPushCancel implements HttpServerAdapters {
                         throw new AssertionError("Unexpected exception: " + c.getCause(), c.getCause());
                     }
                 }
-                assertEquals(promises.size(), 0);
+                assertEquals(0, promises.size());
 
                 // the next time around we should have a new connection,
                 // so we can restart from scratch
@@ -408,7 +409,7 @@ public class H3ServerPushCancel implements HttpServerAdapters {
             // excluding those that got cancelled,
             // we should have received REQUEST-1 notifications
             // per push promise and per connection
-            assertEquals(count, (PUSH_PROMISES.size()-3)*2*(REQUESTS-1),
+            assertEquals((PUSH_PROMISES.size()-3)*2*(REQUESTS-1), count,
                     "Unexpected notification: " + notified);
         }
     }
diff --git a/test/jdk/java/net/httpclient/http3/H3ServerPushWithDiffTypes.java b/test/jdk/java/net/httpclient/http3/H3ServerPushWithDiffTypes.java
index d00012826ef..a863db43c29 100644
--- a/test/jdk/java/net/httpclient/http3/H3ServerPushWithDiffTypes.java
+++ b/test/jdk/java/net/httpclient/http3/H3ServerPushWithDiffTypes.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
  * @test
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm
+ * @run junit/othervm
  *       -Djdk.internal.httpclient.debug=true
  *       -Djdk.httpclient.HttpClient.log=errors,requests,responses
  *       H3ServerPushWithDiffTypes
@@ -65,11 +65,12 @@ import java.util.function.BiPredicate;
 
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpOption.Http3DiscoveryMode.ANY;
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.testng.Assert.assertEquals;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.Test;
 
 public class H3ServerPushWithDiffTypes implements HttpServerAdapters {
 
@@ -89,8 +90,8 @@ public class H3ServerPushWithDiffTypes implements HttpServerAdapters {
         HttpRequest headRequest = HttpRequest.newBuilder(headURI)
                 .HEAD().version(Version.HTTP_2).build();
         var headResponse = client.send(headRequest, BodyHandlers.ofString());
-        assertEquals(headResponse.statusCode(), 200);
-        assertEquals(headResponse.version(), Version.HTTP_2);
+        assertEquals(200, headResponse.statusCode());
+        assertEquals(Version.HTTP_2, headResponse.version());
     }
 
     @Test
@@ -127,13 +128,13 @@ public class H3ServerPushWithDiffTypes implements HttpServerAdapters {
                 results.put(request, cf);
                 cf.join();
 
-                assertEquals(results.size(), PUSH_PROMISES.size() + 1);
+                assertEquals(PUSH_PROMISES.size() + 1, results.size());
 
                 for (HttpRequest r : results.keySet()) {
                     URI u = r.uri();
                     var resp = results.get(r).get();
-                    assertEquals(resp.statusCode(), 200);
-                    assertEquals(resp.version(), Version.HTTP_3);
+                    assertEquals(200, resp.statusCode());
+                    assertEquals(Version.HTTP_3, resp.version());
                     BodyAndType<?> body = resp.body();
                     String result;
                     // convert all body types to String for easier comparison
@@ -153,7 +154,7 @@ public class H3ServerPushWithDiffTypes implements HttpServerAdapters {
                     String expected = PUSH_PROMISES.get(r.uri().getPath());
                     if (expected == null)
                         expected = "the main response body";
-                    assertEquals(result, expected);
+                    assertEquals(expected, result);
                 }
             }
         }
diff --git a/test/jdk/java/net/httpclient/http3/H3SimpleGet.java b/test/jdk/java/net/httpclient/http3/H3SimpleGet.java
index 3745c32afbf..ae113322cd3 100644
--- a/test/jdk/java/net/httpclient/http3/H3SimpleGet.java
+++ b/test/jdk/java/net/httpclient/http3/H3SimpleGet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -30,14 +30,14 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.httpclient.retryOnStreamlimit=20
  *                     -Djdk.httpclient.redirects.retrylimit=21
  *                     -Dsimpleget.repeat=1 -Dsimpleget.chunks=1 -Dsimpleget.requests=1000
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Dsimpleget.requests=150
  *                     -Dsimpleget.chunks=16384
  *                     -Djdk.httpclient.retryOnStreamlimit=5
@@ -53,14 +53,14 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.httpclient.retryOnStreamlimit=20
  *                     -Djdk.httpclient.redirects.retrylimit=21
  *                     -Dsimpleget.repeat=1 -Dsimpleget.chunks=1 -Dsimpleget.requests=1000
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Dsimpleget.requests=150
  *                     -Dsimpleget.chunks=16384
  *                     -Djdk.httpclient.retryOnStreamlimit=5
@@ -77,16 +77,16 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -XX:+UnlockExperimentalVMOptions -XX:-VMContinuations
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -XX:+UnlockExperimentalVMOptions -XX:-VMContinuations
  *                     -Djdk.httpclient.retryOnStreamlimit=20
  *                     -Djdk.httpclient.redirects.retrylimit=21
  *                     -Dsimpleget.repeat=1 -Dsimpleget.chunks=1 -Dsimpleget.requests=1000
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -XX:+UnlockExperimentalVMOptions -XX:-VMContinuations
  *                     -Dsimpleget.requests=150
  *                     -Dsimpleget.chunks=16384
@@ -103,16 +103,16 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.internal.httpclient.quic.useNioSelector=true
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.internal.httpclient.quic.useNioSelector=true
  *                     -Djdk.httpclient.retryOnStreamlimit=20
  *                     -Djdk.httpclient.redirects.retrylimit=21
  *                     -Dsimpleget.repeat=1 -Dsimpleget.chunks=1 -Dsimpleget.requests=1000
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.internal.httpclient.quic.useNioSelector=true
  *                     -Dsimpleget.requests=150
  *                     -Dsimpleget.chunks=16384
@@ -129,16 +129,16 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.internal.httpclient.quic.useNioSelector=true
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.internal.httpclient.quic.useNioSelector=true
  *                     -Djdk.httpclient.retryOnStreamlimit=20
  *                     -Djdk.httpclient.redirects.retrylimit=21
  *                     -Dsimpleget.repeat=1 -Dsimpleget.chunks=1 -Dsimpleget.requests=1000
  *                     H3SimpleGet
- * @run testng/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
+ * @run junit/othervm/timeout=480 -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError
  *                     -Djdk.internal.httpclient.quic.useNioSelector=true
  *                     -Dsimpleget.requests=150
  *                     -Dsimpleget.chunks=16384
@@ -154,7 +154,7 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=480 -Djdk.internal.httpclient.quic.congestionController=reno
+ * @run junit/othervm/timeout=480 -Djdk.internal.httpclient.quic.congestionController=reno
  *                     H3SimpleGet
  * @summary send multiple GET requests using Reno congestion controller
  */
@@ -198,13 +198,14 @@ import javax.net.ssl.SSLContext;
 
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.Assert;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
 public class H3SimpleGet implements HttpServerAdapters {
     static HttpTestServer httpsServer;
     static HttpClient client = null;
@@ -261,13 +262,13 @@ public class H3SimpleGet implements HttpServerAdapters {
     }
 
     public static void main(String[] args) throws Exception {
-        test();
+        new H3SimpleGet().test();
     }
 
     static volatile boolean waitBeforeTest = false;
 
     @Test
-    public static void test() throws Exception {
+    public void test() throws Exception {
         try {
             if (waitBeforeTest) {
                 Thread.sleep(20000);
@@ -283,7 +284,7 @@ public class H3SimpleGet implements HttpServerAdapters {
                     .GET().build();
             long start = System.nanoTime();
             var resp = client.send(request, BodyHandlers.ofByteArrayConsumer(b-> {}));
-            Assert.assertEquals(resp.statusCode(), 200);
+            Assertions.assertEquals(200, resp.statusCode());
             long elapsed = System.nanoTime() - start;
             System.out.println("Stat: First request took: " + elapsed
                     + " nanos (" + TimeUnit.NANOSECONDS.toMillis(elapsed) + " ms)");
@@ -314,7 +315,7 @@ public class H3SimpleGet implements HttpServerAdapters {
                             + connections.size() + " connections");
                 }
             }
-            list.forEach((cf) -> Assert.assertEquals(cf.join().statusCode(), 200));
+            list.forEach((cf) -> Assertions.assertEquals(200, cf.join().statusCode()));
         } catch (Throwable tt) {
             System.err.println("tt caught");
             tt.printStackTrace();
diff --git a/test/jdk/java/net/httpclient/http3/H3SimplePost.java b/test/jdk/java/net/httpclient/http3/H3SimplePost.java
index 4cf46988873..0294f2f69da 100644
--- a/test/jdk/java/net/httpclient/http3/H3SimplePost.java
+++ b/test/jdk/java/net/httpclient/http3/H3SimplePost.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,7 +27,7 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestUtil
  *        jdk.httpclient.test.lib.http2.Http2TestServer
- * @run testng/othervm/timeout=480 H3SimplePost
+ * @run junit/othervm/timeout=480 H3SimplePost
  */
 // -Djdk.httpclient.HttpClient.log=requests,errors,quic
 // -Djdk.httpclient.quic.defaultMTU=64000
@@ -37,8 +37,6 @@
 
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.Assert;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -61,6 +59,9 @@ import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
 public class H3SimplePost implements HttpServerAdapters {
     static HttpTestServer httpsServer;
     static HttpClient client = null;
@@ -115,11 +116,11 @@ public class H3SimplePost implements HttpServerAdapters {
     }
 
     public static void main(String[] args) throws Exception {
-        test();
+        new H3SimplePost().test();
     }
 
     @Test
-    public static void test() throws Exception {
+    public void test() throws Exception {
         try {
             long prestart = System.nanoTime();
             initialize();
@@ -140,7 +141,7 @@ public class H3SimplePost implements HttpServerAdapters {
                     .build();
             long start = System.nanoTime();
             var resp = client.send(getRequest, BodyHandlers.ofByteArrayConsumer(b-> {}));
-            Assert.assertEquals(resp.statusCode(), 200);
+            Assertions.assertEquals(200, resp.statusCode());
             long elapsed = System.nanoTime() - start;
             System.out.println("First GET request took: " + elapsed + " nanos (" + TimeUnit.NANOSECONDS.toMillis(elapsed) + " ms)");
             final int max = 50;
@@ -155,7 +156,7 @@ public class H3SimplePost implements HttpServerAdapters {
             System.out.println("Next " + max + " POST requests took: " + elapsed2 + " nanos ("
                     + TimeUnit.NANOSECONDS.toMillis(elapsed2) + "ms for " + max + " requests): "
                     + elapsed2 / max + " nanos per request (" + TimeUnit.NANOSECONDS.toMillis(elapsed2) / max + " ms)");
-            list.forEach((cf) -> Assert.assertEquals(cf.join().statusCode(), 200));
+            list.forEach((cf) -> Assertions.assertEquals(200, cf.join().statusCode()));
         } catch (Throwable tt) {
             System.err.println("tt caught");
             tt.printStackTrace();
diff --git a/test/jdk/java/net/httpclient/http3/H3SimpleTest.java b/test/jdk/java/net/httpclient/http3/H3SimpleTest.java
index 1880d436501..4258f3bac73 100644
--- a/test/jdk/java/net/httpclient/http3/H3SimpleTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3SimpleTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -32,16 +32,17 @@ import javax.net.ssl.SSLContext;
 
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Builder.NO_PROXY;
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
 /*
  * @test
  * @summary Basic test to verify that simple GET/POST/HEAD
@@ -50,21 +51,21 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
- * @run testng/othervm
+ * @run junit/othervm
  *              -Djdk.internal.httpclient.debug=true
  *              -Djdk.httpclient.HttpClient.log=requests,responses,errors
  *              H3SimpleTest
- * @run testng/othervm
+ * @run junit/othervm
  *              -Djdk.internal.httpclient.debug=true
  *              -Djdk.httpclient.HttpClient.log=requests,responses,errors
  *              -Djava.net.preferIPv6Addresses=true
  *              H3SimpleTest
- * @run testng/othervm
+ * @run junit/othervm
  *              -Djdk.internal.httpclient.debug=true
  *              -Djdk.httpclient.HttpClient.log=requests,responses,errors
  *              -Djava.net.preferIPv4Stack=true
  *              H3SimpleTest
- * @run testng/othervm
+ * @run junit/othervm
  *              -Djdk.internal.httpclient.debug=true
  *              -Djdk.httpclient.HttpClient.log=requests,responses,errors
  *              -Djdk.internal.httpclient.quic.congestionController=reno
@@ -74,11 +75,11 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
 public class H3SimpleTest implements HttpServerAdapters {
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    private HttpTestServer h3Server;
-    private String requestURI;
+    private static HttpTestServer h3Server;
+    private static String requestURI;
 
-    @BeforeClass
-    public void beforeClass() throws Exception {
+    @BeforeAll
+    public static void beforeClass() throws Exception {
         // create an H3 only server
         h3Server = HttpTestServer.create(HTTP_3_URI_ONLY, sslContext);
         h3Server.addHandler((exchange) -> exchange.sendResponseHeaders(200, 0), "/hello");
@@ -87,8 +88,8 @@ public class H3SimpleTest implements HttpServerAdapters {
         requestURI = "https://" + h3Server.serverAuthority() + "/hello";
     }
 
-    @AfterClass
-    public void afterClass() throws Exception {
+    @AfterAll
+    public static void afterClass() throws Exception {
         if (h3Server != null) {
             System.out.println("Stopping server " + h3Server.getAddress());
             h3Server.stop();
@@ -113,18 +114,18 @@ public class H3SimpleTest implements HttpServerAdapters {
         final HttpRequest req1 = reqBuilder.copy().GET().build();
         System.out.println("Issuing request: " + req1);
         final HttpResponse<Void> resp1 = client.send(req1, BodyHandlers.discarding());
-        Assert.assertEquals(resp1.statusCode(), 200, "unexpected response code for GET request");
+        Assertions.assertEquals(200, resp1.statusCode(), "unexpected response code for GET request");
 
         // POST
         final HttpRequest req2 = reqBuilder.copy().POST(BodyPublishers.ofString("foo")).build();
         System.out.println("Issuing request: " + req2);
         final HttpResponse<Void> resp2 = client.send(req2, BodyHandlers.discarding());
-        Assert.assertEquals(resp2.statusCode(), 200, "unexpected response code for POST request");
+        Assertions.assertEquals(200, resp2.statusCode(), "unexpected response code for POST request");
 
         // HEAD
         final HttpRequest req3 = reqBuilder.copy().HEAD().build();
         System.out.println("Issuing request: " + req3);
         final HttpResponse<Void> resp3 = client.send(req3, BodyHandlers.discarding());
-        Assert.assertEquals(resp3.statusCode(), 200, "unexpected response code for HEAD request");
+        Assertions.assertEquals(200, resp3.statusCode(), "unexpected response code for HEAD request");
     }
 }
diff --git a/test/jdk/java/net/httpclient/http3/H3StopSendingTest.java b/test/jdk/java/net/httpclient/http3/H3StopSendingTest.java
index 5b017c15d9b..86b12a1dae6 100644
--- a/test/jdk/java/net/httpclient/http3/H3StopSendingTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3StopSendingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,7 +26,7 @@
  * @summary Verifies that the client reacts correctly to the receipt of a STOP_SENDING frame.
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.httpclient.test.lib.common.HttpServerAdapters
- * @run testng/othervm/timeout=40  -Djdk.internal.httpclient.debug=true -Djdk.httpclient.HttpClient.log=trace,errors,headers
+ * @run junit/othervm/timeout=40  -Djdk.internal.httpclient.debug=true -Djdk.httpclient.HttpClient.log=trace,errors,headers
  *                              H3StopSendingTest
  */
 
@@ -35,9 +35,6 @@ import jdk.httpclient.test.lib.common.HttpServerAdapters.HttpTestHandler;
 import jdk.httpclient.test.lib.common.HttpServerAdapters.HttpTestServer;
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.internal.net.http.http3.Http3Error;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -53,14 +50,18 @@ import java.util.concurrent.ExecutionException;
 import static java.net.http.HttpClient.Builder.NO_PROXY;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
-import static org.testng.Assert.*;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 
 public class H3StopSendingTest {
 
-    HttpTestServer h3TestServer;
-    HttpRequest postRequestNoError, postRequestError;
-    HttpRequest postRequestNoErrorWithData, postRequestErrorWithData;
-    URI h3TestServerUriNoError, h3TestServerUriError;
+    private static HttpTestServer h3TestServer;
+    private static HttpRequest postRequestNoError, postRequestError;
+    private static HttpRequest postRequestNoErrorWithData, postRequestErrorWithData;
+    private static URI h3TestServerUriNoError, h3TestServerUriError;
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
 
     static final String TEST_ROOT_PATH = "/h3_stop_sending_test";
@@ -81,13 +82,13 @@ public class H3StopSendingTest {
             err.println(resp.headers());
             err.println(resp.body());
             err.println(resp.statusCode());
-            assertEquals(resp.statusCode(), 200);
+            assertEquals(200, resp.statusCode());
             resp = client.sendAsync(postRequestNoErrorWithData, HttpResponse.BodyHandlers.ofString()).get();
             err.println(resp.headers());
             err.println(resp.body());
             err.println(resp.statusCode());
-            assertEquals(resp.statusCode(), 200);
-            assertEquals(resp.body(), RESPONSE_MESSAGE.repeat(MESSAGE_REPEAT));
+            assertEquals(200, resp.statusCode());
+            assertEquals(RESPONSE_MESSAGE.repeat(MESSAGE_REPEAT), resp.body());
         }
     }
 
@@ -125,8 +126,8 @@ public class H3StopSendingTest {
         }
     }
 
-    @BeforeTest
-    public void setup() throws IOException {
+    @BeforeAll
+    public static void setup() throws IOException {
 
         h3TestServer = HttpTestServer.create(HTTP_3_URI_ONLY, sslContext);
         h3TestServer.addHandler(new ServerRequestStopSendingHandler(), TEST_ROOT_PATH);
@@ -162,8 +163,8 @@ public class H3StopSendingTest {
                 .build();
     }
 
-    @AfterTest
-    public void afterTest() {
+    @AfterAll
+    public static void afterTest() {
         h3TestServer.stop();
     }
 
diff --git a/test/jdk/java/net/httpclient/http3/H3StreamLimitReachedTest.java b/test/jdk/java/net/httpclient/http3/H3StreamLimitReachedTest.java
index a4524b9ae5e..1ac4a750d77 100644
--- a/test/jdk/java/net/httpclient/http3/H3StreamLimitReachedTest.java
+++ b/test/jdk/java/net/httpclient/http3/H3StreamLimitReachedTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2025, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -46,7 +46,7 @@
  *        jdk.test.lib.Asserts
  *        jdk.test.lib.Utils
  *        jdk.test.lib.net.SimpleSSLContext
- * @run testng/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors,http3,quic:control
+ * @run junit/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors,http3,quic:control
  *                     -Djdk.internal.httpclient.debug=false
  *                     -Djdk.internal.httpclient.quic.maxBidiStreams=1
  *                     H3StreamLimitReachedTest
@@ -77,7 +77,7 @@
  *        jdk.test.lib.Asserts
  *        jdk.test.lib.Utils
  *        jdk.test.lib.net.SimpleSSLContext
- * @run testng/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors,http3,quic:control
+ * @run junit/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors,http3,quic:control
  *                     -Djdk.internal.httpclient.debug=false
  *                     -Djdk.internal.httpclient.quic.maxBidiStreams=1
  *                     -Djdk.httpclient.http3.maxStreamLimitTimeout=0
@@ -114,7 +114,6 @@ import jdk.httpclient.test.lib.http2.Http2TestExchange;
 import jdk.httpclient.test.lib.http2.Http2TestServer;
 import jdk.httpclient.test.lib.http3.Http3TestServer;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Version.HTTP_2;
 import static java.net.http.HttpClient.Version.HTTP_3;
@@ -125,7 +124,9 @@ import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static jdk.test.lib.Asserts.assertEquals;
 import static jdk.test.lib.Asserts.assertNotEquals;
 import static jdk.test.lib.Asserts.assertTrue;
-import static org.testng.Assert.assertFalse;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import org.junit.jupiter.api.Test;
 
 public class H3StreamLimitReachedTest implements HttpServerAdapters {
 
@@ -329,7 +330,7 @@ public class H3StreamLimitReachedTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void testH3Only() throws Exception {
+    public void testH3Only() throws Exception {
         System.out.println("\nTesting HTTP/3 only");
         initialize(true);
         try (HttpClient client = getClient()) {
@@ -402,12 +403,12 @@ public class H3StreamLimitReachedTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void testH2H3WithTwoAltSVC() throws Exception {
+    public void testH2H3WithTwoAltSVC() throws Exception {
         testH2H3(false);
     }
 
     @Test
-    public static void testH2H3WithAltSVCOnSamePort() throws Exception {
+    public void testH2H3WithAltSVCOnSamePort() throws Exception {
         testH2H3(true);
     }
 
@@ -627,12 +628,12 @@ public class H3StreamLimitReachedTest implements HttpServerAdapters {
     }
 
     @Test
-    public static void testParallelH2H3WithTwoAltSVC() throws Exception {
+    public void testParallelH2H3WithTwoAltSVC() throws Exception {
         testH2H3Concurrent(false);
     }
 
     @Test
-    public static void testParallelH2H3WithAltSVCOnSamePort() throws Exception {
+    public void testParallelH2H3WithAltSVCOnSamePort() throws Exception {
         testH2H3Concurrent(true);
     }
 
diff --git a/test/jdk/java/net/httpclient/http3/HTTP3NoBodyTest.java b/test/jdk/java/net/httpclient/http3/HTTP3NoBodyTest.java
index 601e40c7dc6..b43ce8dcf79 100644
--- a/test/jdk/java/net/httpclient/http3/HTTP3NoBodyTest.java
+++ b/test/jdk/java/net/httpclient/http3/HTTP3NoBodyTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,7 +29,7 @@
  *        jdk.httpclient.test.lib.http3.Http3TestServer
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
  * @compile ../ReferenceTracker.java
- * @run testng/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors
+ * @run junit/othervm -Djdk.httpclient.HttpClient.log=ssl,requests,responses,errors
  *       -Djdk.internal.httpclient.debug=true
  *       HTTP3NoBodyTest
  * @summary this is a copy of http2/NoBodyTest over HTTP/3
@@ -38,8 +38,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.net.*;
-import javax.net.ssl.*;
+import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpHeaders;
 import java.net.http.HttpRequest;
@@ -48,9 +47,12 @@ import java.net.http.HttpOption.Http3DiscoveryMode;
 import java.net.http.HttpResponse;
 import java.net.http.HttpResponse.BodyHandlers;
 import java.util.Random;
-import java.util.concurrent.*;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import javax.net.ssl.SSLContext;
+
 import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.httpclient.test.lib.http2.Http2TestServer;
 import jdk.httpclient.test.lib.http2.Http2TestExchange;
@@ -58,7 +60,6 @@ import jdk.httpclient.test.lib.http2.Http2Handler;
 import jdk.httpclient.test.lib.http3.Http3TestServer;
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.RandomFactory;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.Http3DiscoveryMode.ALT_SVC;
@@ -66,7 +67,8 @@ import static java.net.http.HttpOption.Http3DiscoveryMode.ANY;
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
-@Test
+import org.junit.jupiter.api.Test;
+
 public class HTTP3NoBodyTest {
     private static final Random RANDOM = RandomFactory.getRandom();
 
@@ -119,7 +121,7 @@ public class HTTP3NoBodyTest {
     }
 
     @Test
-    public static void runtest() throws Exception {
+    public void runtest() throws Exception {
         try {
             initialize();
             warmup(false);
diff --git a/test/jdk/java/net/httpclient/http3/Http3ExpectContinueTest.java b/test/jdk/java/net/httpclient/http3/Http3ExpectContinueTest.java
index 53ce6a68d38..1cf6900ed5d 100644
--- a/test/jdk/java/net/httpclient/http3/Http3ExpectContinueTest.java
+++ b/test/jdk/java/net/httpclient/http3/Http3ExpectContinueTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,7 +27,7 @@
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @compile ../ReferenceTracker.java
  * @build jdk.httpclient.test.lib.common.HttpServerAdapters
- * @run testng/othervm -Djdk.internal.httpclient.debug=true
+ * @run junit/othervm -Djdk.internal.httpclient.debug=true
  *                     -Djdk.httpclient.HttpClient.log=errors,requests,headers
  *                     Http3ExpectContinueTest
  */
@@ -36,11 +36,6 @@ import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.httpclient.test.lib.http3.Http3TestServer;
 import jdk.httpclient.test.lib.quic.QuicServer;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.annotations.AfterTest;
-import org.testng.annotations.BeforeTest;
-import org.testng.annotations.DataProvider;
-import org.testng.TestException;
-import org.testng.annotations.Test;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
@@ -60,15 +55,20 @@ import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
 
 import static java.net.http.HttpClient.Version.HTTP_3;
-import static org.testng.Assert.*;
+
+import org.junit.jupiter.api.AfterAll;
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
 
 public class Http3ExpectContinueTest implements HttpServerAdapters {
 
-    ReferenceTracker TRACKER = ReferenceTracker.INSTANCE;
+    private static final ReferenceTracker TRACKER = ReferenceTracker.INSTANCE;
 
-    Http3TestServer http3TestServer;
+    private static Http3TestServer http3TestServer;
 
-    URI h3postUri, h3forcePostUri, h3hangUri;
+    private static URI h3postUri, h3forcePostUri, h3hangUri;
 
     static PrintStream err = new PrintStream(System.err);
     static PrintStream out = new PrintStream(System.out);
@@ -78,8 +78,7 @@ public class Http3ExpectContinueTest implements HttpServerAdapters {
     static final String BODY = "Post body";
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
 
-    @DataProvider(name = "uris")
-    public Object[][] urisData() {
+    public static Object[][] urisData() {
         return new Object[][]{
                 // URI, Expected Status Code, Will finish with Exception
                 { h3postUri, 200, false },
@@ -88,7 +87,8 @@ public class Http3ExpectContinueTest implements HttpServerAdapters {
         };
     }
 
-    @Test(dataProvider = "uris")
+    @ParameterizedTest
+    @MethodSource("urisData")
     public void test(URI uri, int expectedStatusCode, boolean exceptionally)
             throws CancellationException, InterruptedException, ExecutionException, IOException {
 
@@ -149,8 +149,8 @@ public class Http3ExpectContinueTest implements HttpServerAdapters {
         }
     }
 
-    @BeforeTest
-    public void setup() throws Exception {
+    @BeforeAll
+    public static void setup() throws Exception {
         final QuicServer quicServer = Http3TestServer.quicServerBuilder()
                 .sslContext(sslContext)
                 .build();
@@ -167,8 +167,8 @@ public class Http3ExpectContinueTest implements HttpServerAdapters {
         http3TestServer.start();
     }
 
-    @AfterTest
-    public void teardown() throws IOException {
+    @AfterAll
+    public static void teardown() throws IOException {
         var error = TRACKER.check(500);
         if (error != null) throw error;
         http3TestServer.stop();
@@ -233,11 +233,11 @@ public class Http3ExpectContinueTest implements HttpServerAdapters {
         }
         if (exceptionally && testThrowable != null) {
             err.println("Finished exceptionally Test throwable: " + testThrowable);
-            assertEquals(IOException.class, testThrowable.getClass());
+            assertEquals(testThrowable.getClass(), IOException.class);
         } else if (exceptionally) {
-            throw new TestException("Expected case to finish with an IOException but testException is null");
+            fail("Expected case to finish with an IOException but testException is null");
         } else if (resp != null) {
-            assertEquals(resp.statusCode(), expectedStatusCode);
+            assertEquals(expectedStatusCode, resp.statusCode());
             err.println("Request completed successfully for path " + path);
             err.println("Response Headers: " + resp.headers());
             err.println("Response Status Code: " + resp.statusCode());
diff --git a/test/jdk/java/net/httpclient/http3/PeerUniStreamDispatcherTest.java b/test/jdk/java/net/httpclient/http3/PeerUniStreamDispatcherTest.java
index be1b8304bf1..fc6d43bb472 100644
--- a/test/jdk/java/net/httpclient/http3/PeerUniStreamDispatcherTest.java
+++ b/test/jdk/java/net/httpclient/http3/PeerUniStreamDispatcherTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @run testng/othervm
+ * @run junit/othervm
  *      -Djdk.internal.httpclient.debug=out
  *      PeerUniStreamDispatcherTest
  * @summary Unit test for the PeerUniStreamDispatcher
@@ -45,8 +45,8 @@ import jdk.internal.net.http.quic.streams.QuicReceiverStream;
 import jdk.internal.net.http.quic.streams.QuicStreamReader;
 import jdk.internal.net.http.quic.streams.QuicStreams;
 
-import org.testng.annotations.Test;
-import static org.testng.Assert.*;
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
 
 public class PeerUniStreamDispatcherTest {
 
@@ -301,7 +301,7 @@ public class PeerUniStreamDispatcherTest {
         assertTrue(reader.connected());
         int size = VariableLengthEncoder.getEncodedSize(code);
         ByteBuffer buffer = ByteBuffer.allocate(size);
-        assertEquals(buffer.remaining(), size);
+        assertEquals(size, buffer.remaining());
         VariableLengthEncoder.encode(buffer, code);
         buffer.flip();
         stream.buffers.add(buffer);
@@ -313,7 +313,7 @@ public class PeerUniStreamDispatcherTest {
             // will loop correctly.
             size = VariableLengthEncoder.getEncodedSize(1L << 62 - 5);
             ByteBuffer buffer2 = ByteBuffer.allocate(size);
-            assertEquals(buffer2.remaining(), size);
+            assertEquals(size, buffer2.remaining());
             VariableLengthEncoder.encode(buffer2, 1L << 62 - 5);
             buffer2.flip();
             stream.buffers.add(ByteBuffer.wrap(new byte[] {buffer2.get()}));
@@ -328,7 +328,7 @@ public class PeerUniStreamDispatcherTest {
         assertFalse(reader.connected());
         assertFalse(dispatcher.dispatched.isEmpty());
         assertTrue(stream.buffers.isEmpty());
-        assertEquals(dispatcher.dispatched.size(), 1);
+        assertEquals(1, dispatcher.dispatched.size());
         var dispatched = dispatcher.dispatched.get(0);
         checkDispatched(type, code, stream, dispatched);
     }
@@ -343,30 +343,30 @@ public class PeerUniStreamDispatcherTest {
             case RESERVED -> DispatchedStream.ReservedStream.class;
             case UNKNOWN -> DispatchedStream.UnknownStream.class;
         };
-        assertEquals(dispatched.getClass(), streamClass,
+        assertEquals(streamClass, dispatched.getClass(),
                 "unexpected dispatched class " + dispatched + " for " + type);
         if (dispatched instanceof DispatchedStream.StandardStream st) {
             System.out.println("Got expected stream: " + st);
-            assertEquals(st.type(), type);
-            assertEquals(st.stream, stream);
+            assertEquals(type, st.type());
+            assertEquals(stream, st.stream);
         } else if (dispatched instanceof  DispatchedStream.ReservedStream res) {
             System.out.println("Got expected stream: " + res);
-            assertEquals(res.type(), type);
-            assertEquals(res.stream, stream);
-            assertEquals(res.code(), code);
+            assertEquals(type, res.type());
+            assertEquals(stream, res.stream);
+            assertEquals(code, res.code());
             assertTrue(Http3Streams.isReserved(res.code()));
         } else if (dispatched instanceof  DispatchedStream.UnknownStream unk) {
             System.out.println("Got expected stream: " + unk);
-            assertEquals(unk.type(), type);
-            assertEquals(unk.stream, stream);
-            assertEquals(unk.code(), code);
+            assertEquals(type, unk.type());
+            assertEquals(stream, unk.stream);
+            assertEquals(code, unk.code());
             assertFalse(Http3Streams.isReserved(unk.code()));
         } else if (dispatched instanceof DispatchedStream.PushStream push) {
             System.out.println("Got expected stream: " + push);
-            assertEquals(push.type(), type);
-            assertEquals(push.stream, stream);
-            assertEquals(push.pushId, 1L << 62 - 5);
-            assertEquals(push.type(), DISPATCHED_STREAM.PUSH);
+            assertEquals(type, push.type());
+            assertEquals(stream, push.stream);
+            assertEquals(1L << 62 - 5, push.pushId);
+            assertEquals(DISPATCHED_STREAM.PUSH, push.type());
         }
 
     }
@@ -406,9 +406,9 @@ public class PeerUniStreamDispatcherTest {
         SequentialScheduler scheduler = stream.scheduler;
         assertTrue(reader.connected());
         int size = VariableLengthEncoder.getEncodedSize(code);
-        assertEquals(size, 8);
+        assertEquals(8, size);
         ByteBuffer buffer = ByteBuffer.allocate(size);
-        assertEquals(buffer.remaining(), size);
+        assertEquals(size, buffer.remaining());
         VariableLengthEncoder.encode(buffer, code);
         buffer.flip();
         dispatcher.start();
@@ -428,7 +428,7 @@ public class PeerUniStreamDispatcherTest {
         assertFalse(reader.connected());
         assertFalse(dispatcher.dispatched.isEmpty());
         assertTrue(stream.buffers.isEmpty());
-        assertEquals(dispatcher.dispatched.size(), 1);
+        assertEquals(1, dispatcher.dispatched.size());
         var dispatched = dispatcher.dispatched.get(0);
         checkDispatched(type, code, stream, dispatched);
     }
diff --git a/test/jdk/java/net/httpclient/http3/StopSendingTest.java b/test/jdk/java/net/httpclient/http3/StopSendingTest.java
index ff1b8db7bc8..8c9a6f84b65 100644
--- a/test/jdk/java/net/httpclient/http3/StopSendingTest.java
+++ b/test/jdk/java/net/httpclient/http3/StopSendingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -44,14 +44,15 @@ import jdk.httpclient.test.lib.common.HttpServerAdapters;
 import jdk.internal.net.http.ResponseSubscribers;
 import jdk.test.lib.net.SimpleSSLContext;
 import jdk.test.lib.net.URIBuilder;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 
 import static java.net.http.HttpOption.Http3DiscoveryMode.HTTP_3_URI_ONLY;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
 /*
  * @test
  * @summary Exercises the HTTP3 client to send a STOP_SENDING frame
@@ -59,17 +60,17 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
  * @compile ../ReferenceTracker.java
- * @run testng/othervm -Djdk.internal.httpclient.debug=true
+ * @run junit/othervm -Djdk.internal.httpclient.debug=true
  *             -Djdk.httpclient.HttpClient.log=requests,responses,errors StopSendingTest
  */
 public class StopSendingTest implements HttpServerAdapters {
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    private HttpTestServer h3Server;
-    private String requestURIBase;
+    private static HttpTestServer h3Server;
+    private static String requestURIBase;
 
-    @BeforeClass
-    public void beforeClass() throws Exception {
+    @BeforeAll
+    public static void beforeClass() throws Exception {
         h3Server = HttpTestServer.create(HTTP_3_URI_ONLY, sslContext);
         h3Server.addHandler(new Handler(), "/hello");
         h3Server.start();
@@ -79,8 +80,8 @@ public class StopSendingTest implements HttpServerAdapters {
 
     }
 
-    @AfterClass
-    public void afterClass() throws Exception {
+    @AfterAll
+    public static void afterClass() throws Exception {
         if (h3Server != null) {
             System.out.println("Stopping server " + h3Server.getAddress());
             h3Server.stop();
@@ -154,7 +155,7 @@ public class StopSendingTest implements HttpServerAdapters {
             // of the Future instance, sometimes the Future.cancel(true) results
             // in an ExecutionException which wraps the CancellationException.
             // TODO: fix the actual race condition and then expect only CancellationException here
-            final Exception actualException = Assert.expectThrows(Exception.class, futureResp::get);
+            final Exception actualException = Assertions.assertThrows(Exception.class, futureResp::get);
             if (actualException instanceof CancellationException) {
                 // expected
                 System.out.println("Received the expected CancellationException");
diff --git a/test/jdk/java/net/httpclient/http3/StreamLimitTest.java b/test/jdk/java/net/httpclient/http3/StreamLimitTest.java
index e0610cf89b8..9e15db9ceb9 100644
--- a/test/jdk/java/net/httpclient/http3/StreamLimitTest.java
+++ b/test/jdk/java/net/httpclient/http3/StreamLimitTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -45,14 +45,15 @@ import jdk.httpclient.test.lib.quic.QuicServerConnection;
 import jdk.internal.net.http.quic.QuicTransportParameters;
 import jdk.internal.net.http.quic.QuicTransportParameters.ParameterId;
 import jdk.test.lib.net.SimpleSSLContext;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 import static java.net.http.HttpClient.Builder.NO_PROXY;
 import static java.net.http.HttpClient.Version.HTTP_3;
 import static java.net.http.HttpOption.H3_DISCOVERY;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
 /*
  * @test
  * @summary verifies that when the Quic stream limit is reached
@@ -64,17 +65,17 @@ import static java.net.http.HttpOption.H3_DISCOVERY;
  * @build jdk.test.lib.net.SimpleSSLContext
  *        jdk.httpclient.test.lib.common.HttpServerAdapters
  *        jdk.httpclient.test.lib.http3.Http3TestServer
- * @run testng/othervm -Djdk.internal.httpclient.debug=true StreamLimitTest
+ * @run junit/othervm -Djdk.internal.httpclient.debug=true StreamLimitTest
  */
 public class StreamLimitTest {
 
     private static final SSLContext sslContext = SimpleSSLContext.findSSLContext();
-    private HttpTestServer server;
-    private QuicServer quicServer;
-    private URI requestURI;
-    private volatile QuicServerConnection latestServerConn;
+    private static HttpTestServer server;
+    private static QuicServer quicServer;
+    private static URI requestURI;
+    private static volatile QuicServerConnection latestServerConn;
 
-    private final class Handler implements HttpTestHandler {
+    private static final class Handler implements HttpTestHandler {
 
         @Override
         public void handle(HttpTestExchange exchange) throws IOException {
@@ -97,8 +98,8 @@ public class StreamLimitTest {
         }
     }
 
-    @BeforeClass
-    public void beforeClass() throws Exception {
+    @BeforeAll
+    public static void beforeClass() throws Exception {
         quicServer = Http3TestServer.quicServerBuilder().sslContext(sslContext).build();
         final Http3TestServer h3Server = new Http3TestServer(quicServer) {
             @Override
@@ -118,8 +119,8 @@ public class StreamLimitTest {
         requestURI = new URI("https://" + server.serverAuthority() + "/foo");
     }
 
-    @AfterClass
-    public void afterClass() throws Exception {
+    @AfterAll
+    public static void afterClass() throws Exception {
         latestServerConn = null;
         if (server != null) {
             server.stop();
@@ -161,8 +162,8 @@ public class StreamLimitTest {
             System.out.println("Sending request " + i + " to " + requestURI);
             final HttpResponse<String> resp = client.send(req,
                     HttpResponse.BodyHandlers.ofString());
-            Assert.assertEquals(resp.version(), HTTP_3, "Unexpected response version");
-            Assert.assertEquals(resp.statusCode(), 200, "Unexpected response code");
+            Assertions.assertEquals(HTTP_3, resp.version(), "Unexpected response version");
+            Assertions.assertEquals(200, resp.statusCode(), "Unexpected response code");
             final String respBody = resp.body();
             System.out.println("Request " + i + " was handled by server connection: " + respBody);
             if (i == 1) {
@@ -170,7 +171,7 @@ public class StreamLimitTest {
                 // to this request
                 requestHandledBy = respBody;
             } else {
-                Assert.assertEquals(respBody, requestHandledBy, "Request was handled by an" +
+                Assertions.assertEquals(requestHandledBy, respBody, "Request was handled by an" +
                         " unexpected server connection");
             }
         }
@@ -193,20 +194,20 @@ public class StreamLimitTest {
                     + requestURI);
             final HttpResponse<String> resp = client.send(reqWithTimeout,
                     HttpResponse.BodyHandlers.ofString());
-            Assert.assertEquals(resp.version(), HTTP_3, "Unexpected response version");
-            Assert.assertEquals(resp.statusCode(), 200, "Unexpected response code");
+            Assertions.assertEquals(HTTP_3, resp.version(), "Unexpected response version");
+            Assertions.assertEquals(200, resp.statusCode(), "Unexpected response code");
             final String respBody = resp.body();
             System.out.println("Request " + i + " was handled by server connection: " + respBody);
             if (i == 1) {
                 // first request after the limit was hit.
                 // verify that it was handled by a new connection and not the one that handled
                 // the previous N requests
-                Assert.assertNotEquals(respBody, requestHandledBy, "Request was expected to be" +
+                Assertions.assertNotEquals(requestHandledBy, respBody, "Request was expected to be" +
                         " handled by a new server connection, but wasn't");
                 // keep track this new server connection id which responded to this request
                 requestHandledBy = respBody;
             } else {
-                Assert.assertEquals(respBody, requestHandledBy, "Request was handled by an" +
+                Assertions.assertEquals(requestHandledBy, respBody, "Request was handled by an" +
                         " unexpected server connection");
             }
         }
@@ -231,13 +232,13 @@ public class StreamLimitTest {
                     " to " + requestURI);
             final HttpResponse<String> resp = client.send(reqWithTimeout,
                     HttpResponse.BodyHandlers.ofString());
-            Assert.assertEquals(resp.version(), HTTP_3, "Unexpected response version");
-            Assert.assertEquals(resp.statusCode(), 200, "Unexpected response code");
+            Assertions.assertEquals(HTTP_3, resp.version(), "Unexpected response version");
+            Assertions.assertEquals(200, resp.statusCode(), "Unexpected response code");
             final String respBody = resp.body();
             System.out.println("Request " + i + " was handled by server connection: " + respBody);
             // all these requests should be handled by the same server connection which handled
             // the previous requests
-            Assert.assertEquals(respBody, requestHandledBy, "Request was handled by an" +
+            Assertions.assertEquals(requestHandledBy, respBody, "Request was handled by an" +
                     " unexpected server connection");
         }
         // at this point the newer limit for bidi stream creation has reached on the client.
@@ -254,12 +255,12 @@ public class StreamLimitTest {
         System.out.println("Sending request, without timeout, to " + requestURI);
         final HttpResponse<String> finalResp = client.send(finalReq,
                 HttpResponse.BodyHandlers.ofString());
-        Assert.assertEquals(finalResp.version(), HTTP_3, "Unexpected response version");
-        Assert.assertEquals(finalResp.statusCode(), 200, "Unexpected response code");
+        Assertions.assertEquals(HTTP_3, finalResp.version(), "Unexpected response version");
+        Assertions.assertEquals(200, finalResp.statusCode(), "Unexpected response code");
         final String finalRespBody = finalResp.body();
         System.out.println("Request was handled by server connection: " + finalRespBody);
         // this request should have been handled by a new server connection
-        Assert.assertNotEquals(finalRespBody, requestHandledBy, "Request was handled by an" +
+        Assertions.assertNotEquals(requestHandledBy, finalRespBody, "Request was handled by an" +
                 " unexpected server connection");
     }
 }
diff --git a/test/jdk/java/net/httpclient/offline/OfflineTesting.java b/test/jdk/java/net/httpclient/offline/OfflineTesting.java
index 2f4833bf179..f36a457022e 100644
--- a/test/jdk/java/net/httpclient/offline/OfflineTesting.java
+++ b/test/jdk/java/net/httpclient/offline/OfflineTesting.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
  * @test
  * @summary Demonstrates how to achieve testing without network connections
  * @build DelegatingHttpClient FixedHttpResponse FixedResponseHttpClient
- * @run testng/othervm OfflineTesting
+ * @run junit/othervm OfflineTesting
  */
 
 import java.io.IOException;
@@ -40,13 +40,15 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.function.BiPredicate;
-import org.testng.annotations.Test;
 import static java.lang.String.format;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.util.Objects.requireNonNull;
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertTrue;
-import static org.testng.Assert.fail;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
 
 public class OfflineTesting {
 
@@ -72,9 +74,9 @@ public class OfflineTesting {
             client.sendAsync(request, BodyHandlers.ofString())
                     .thenAccept(response -> {
                         System.out.println("response: " + response);
-                        assertEquals(response.statusCode(), 200);
+                        assertEquals(200, response.statusCode());
                         assertTrue(response.headers().firstValue("Server").isPresent());
-                        assertEquals(response.body(), "A response message");
+                        assertEquals("A response message", response.body());
                     })
                     .join();
         }
@@ -91,9 +93,9 @@ public class OfflineTesting {
             client.sendAsync(request, BodyHandlers.ofByteArray())
                     .thenAccept(response -> {
                         System.out.println("response: " + response);
-                        assertEquals(response.statusCode(), 200);
+                        assertEquals(200, response.statusCode());
                         assertTrue(response.headers().firstValue("Content-Type").isPresent());
-                        assertEquals(response.body(), "A response message".getBytes(UTF_8));
+                        Assertions.assertArrayEquals("A response message".getBytes(UTF_8), response.body());
                     })
                     .join();
         }
@@ -125,9 +127,9 @@ public class OfflineTesting {
         try (var client = fixedClient) {
             client.sendAsync(request, BodyHandlers.ofString())
                     .thenAccept(response -> {
-                        assertEquals(response.statusCode(), 404);
+                        assertEquals(404, response.statusCode());
                         response.headers().firstValue("Content-Type")
-                                .ifPresentOrElse(type -> assertEquals(type, "text/html"),
+                                .ifPresentOrElse(type -> assertEquals("text/html", type),
                                         () -> fail("Content-Type not present"));
                         assertTrue(response.body().contains("404 Not Found"));
                     })
@@ -151,8 +153,8 @@ public class OfflineTesting {
             client.sendAsync(request, BodyHandlers.ofString())
                     .thenAccept(response -> {
                         System.out.println("response: " + response);
-                        assertEquals(response.statusCode(), 200);
-                        assertEquals(response.body(), "Hello World");
+                        assertEquals(200, response.statusCode());
+                        assertEquals("Hello World", response.body());
                     })
                     .join();
         }
@@ -172,8 +174,8 @@ public class OfflineTesting {
 
             HttpResponse<String> response = client.send(request, BodyHandlers.ofString());
             System.out.println("response: " + response);
-            assertEquals(response.statusCode(), 200);
-            assertEquals(response.body(), "Hello chegar!!");
+            assertEquals(200, response.statusCode());
+            assertEquals("Hello chegar!!", response.body());
         }
     }
 
diff --git a/test/jdk/java/net/httpclient/security/filePerms/FileProcessorPermissionTest.java b/test/jdk/java/net/httpclient/security/filePerms/FileProcessorPermissionTest.java
index c8920771727..361b053fe43 100644
--- a/test/jdk/java/net/httpclient/security/filePerms/FileProcessorPermissionTest.java
+++ b/test/jdk/java/net/httpclient/security/filePerms/FileProcessorPermissionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,7 +24,7 @@
 /*
  * @test
  * @summary Basic checks for File Processors
- * @run testng/othervm FileProcessorPermissionTest
+ * @run junit/othervm FileProcessorPermissionTest
  */
 
 import java.nio.file.Path;
@@ -32,9 +32,9 @@ import java.nio.file.Paths;
 import java.util.List;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse.BodyHandlers;
-import org.testng.annotations.Test;
 import static java.nio.file.StandardOpenOption.*;
-import static org.testng.Assert.*;
+
+import org.junit.jupiter.api.Test;
 
 public class FileProcessorPermissionTest {
 
diff --git a/test/jdk/java/net/httpclient/security/filePerms/SecurityBeforeFile.java b/test/jdk/java/net/httpclient/security/filePerms/SecurityBeforeFile.java
index d54e27b89ce..c8d7bb64b36 100644
--- a/test/jdk/java/net/httpclient/security/filePerms/SecurityBeforeFile.java
+++ b/test/jdk/java/net/httpclient/security/filePerms/SecurityBeforeFile.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
  * @test
  * @summary Verifies security checks are performed before existence checks
  *          in pre-defined body processors APIs
- * @run testng/othervm SecurityBeforeFile
+ * @run junit/othervm SecurityBeforeFile
  */
 
 import java.io.FileNotFoundException;
@@ -35,11 +35,13 @@ import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.net.http.HttpRequest.BodyPublishers;
 import java.net.http.HttpResponse.BodyHandlers;
-import org.testng.annotations.DataProvider;
-import org.testng.annotations.Test;
 import static java.lang.System.out;
 import static java.nio.file.StandardOpenOption.*;
-import static org.testng.Assert.*;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import static org.junit.jupiter.api.Assertions.fail;
 
 public class SecurityBeforeFile {
 
@@ -57,8 +59,7 @@ public class SecurityBeforeFile {
         }
     }
 
-    @DataProvider(name = "handlerOpenOptions")
-    public Object[][] handlerOpenOptions() {
+    public static Object[][] handlerOpenOptions() {
         return new Object[][] {
                 { new OpenOption[] {               } },
                 { new OpenOption[] { CREATE        } },
@@ -66,7 +67,8 @@ public class SecurityBeforeFile {
         };
     }
 
-    @Test(dataProvider = "handlerOpenOptions")
+    @ParameterizedTest
+    @MethodSource("handlerOpenOptions")
     public void BodyHandlersOfFileDownload(OpenOption[] openOptions) {
         Path p = Paths.get("doesNotExistDir");
         if (Files.exists(p))
diff --git a/test/jdk/java/nio/channels/Selector/ConnectionRefusedMessage.java b/test/jdk/java/nio/channels/SocketChannel/ConnectionRefusedMessage.java
similarity index 92%
rename from test/jdk/java/nio/channels/Selector/ConnectionRefusedMessage.java
rename to test/jdk/java/nio/channels/SocketChannel/ConnectionRefusedMessage.java
index 04490f63efe..d71bc6569cb 100644
--- a/test/jdk/java/nio/channels/Selector/ConnectionRefusedMessage.java
+++ b/test/jdk/java/nio/channels/SocketChannel/ConnectionRefusedMessage.java
@@ -42,7 +42,8 @@ import static org.junit.jupiter.api.Assumptions.assumeTrue;
  * @summary Verify that when a SocketChannel is registered with a Selector
  *          with an interest in CONNECT operation, then SocketChannel.finishConnect()
  *          throws the correct exception message, if the connect() fails
- * @run junit ${test.main.class}
+ * @run junit/othervm -Djdk.includeInExceptions=hostInfoExclSocket ${test.main.class}
+ * @run junit/othervm -Djdk.includeInExceptions=hostInfo -Dcheck.relaxed=true ${test.main.class}
  */
 class ConnectionRefusedMessage {
 
@@ -108,10 +109,14 @@ class ConnectionRefusedMessage {
     }
 
     private static void assertExceptionMessage(final ConnectException ce) {
-        if (!"Connection refused".equals(ce.getMessage())) {
-            // propagate the original exception
-            fail("unexpected exception message: " + ce.getMessage(), ce);
+        if ("Connection refused".equals(ce.getMessage())) {
+            return;
         }
+        if (Boolean.getBoolean("check.relaxed") && ce.getMessage() != null && ce.getMessage().startsWith("Connection refused")) {
+            return;
+        }
+        // propagate the original exception
+        fail("unexpected exception message: " + ce.getMessage(), ce);
     }
 
     // Try to find a suitable port to provoke a "Connection Refused" error.
diff --git a/test/jdk/java/util/jar/Attributes/IterationOrder.java b/test/jdk/java/util/jar/Attributes/IterationOrder.java
index 4028d71e7c4..edd1d9b8bc8 100644
--- a/test/jdk/java/util/jar/Attributes/IterationOrder.java
+++ b/test/jdk/java/util/jar/Attributes/IterationOrder.java
@@ -1,5 +1,6 @@
 /*
  * Copyright 2014 Google, Inc.  All Rights Reserved.
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,15 +25,26 @@
 /* @test
  * @bug 8062194
  * @summary Ensure Attribute iteration order is the insertion order.
+ * @run junit IterationOrder
  */
 
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
 import java.util.Arrays;
 import java.util.Map;
 import java.util.jar.Attributes;
 import java.util.jar.Attributes.Name;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.fail;
 
 public class IterationOrder {
-    static void checkOrder(Attributes.Name k0, String v0,
+
+    @ParameterizedTest
+    @MethodSource
+    void checkOrderTest(Attributes.Name k0, String v0,
                            Attributes.Name k1, String v1,
                            Attributes.Name k2, String v2) {
         Attributes x = new Attributes();
@@ -48,7 +60,7 @@ public class IterationOrder {
               && entries[1].getValue() == v1
               && entries[2].getKey() == k2
               && entries[2].getValue() == v2)) {
-            throw new AssertionError(Arrays.toString(entries));
+            fail(Arrays.toString(entries));
         }
 
         Object[] keys = x.keySet().toArray();
@@ -56,19 +68,21 @@ public class IterationOrder {
               && keys[0] == k0
               && keys[1] == k1
               && keys[2] == k2)) {
-             throw new AssertionError(Arrays.toString(keys));
+             fail(Arrays.toString(keys));
         }
     }
 
-    public static void main(String[] args) throws Exception {
+    static Stream<Arguments> checkOrderTest() {
         Attributes.Name k0 = Name.MANIFEST_VERSION;
         Attributes.Name k1 = Name.MAIN_CLASS;
         Attributes.Name k2 = Name.SEALED;
         String v0 = "42.0";
         String v1 = "com.google.Hello";
         String v2 = "yes";
-        checkOrder(k0, v0, k1, v1, k2, v2);
-        checkOrder(k1, v1, k0, v0, k2, v2);
-        checkOrder(k2, v2, k1, v1, k0, v0);
+        return Stream.of(
+                Arguments.of(k0, v0, k1, v1, k2, v2),
+                Arguments.of(k1, v1, k0, v0, k2, v2),
+                Arguments.of(k2, v2, k1, v1, k0, v0)
+        );
     }
 }
diff --git a/test/jdk/java/util/jar/Attributes/Name.java b/test/jdk/java/util/jar/Attributes/Name.java
index 78306028698..843038cb820 100644
--- a/test/jdk/java/util/jar/Attributes/Name.java
+++ b/test/jdk/java/util/jar/Attributes/Name.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,17 +25,20 @@
    @bug 4199981
    @summary Make sure empty string is not a valid
             Attributes name.
-   */
+   @run junit Name
+ */
 
+import org.junit.jupiter.api.Test;
 
 import java.util.jar.Attributes;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 public class Name {
-    public static void main(String[] args) throws Exception {
-        try {
-            Attributes.Name name = new Attributes.Name("");
-            throw new Exception("empty string should be rejected");
-        } catch (IllegalArgumentException e) {
-        }
+
+    @Test
+    void emptyStringTest() {
+        assertThrows(IllegalArgumentException.class, () -> new Attributes.Name(""),
+                "empty string should be rejected");
     }
 }
diff --git a/test/jdk/java/util/jar/Attributes/NullAndEmptyKeysAndValues.java b/test/jdk/java/util/jar/Attributes/NullAndEmptyKeysAndValues.java
index c62ddcced8a..e99825d235e 100644
--- a/test/jdk/java/util/jar/Attributes/NullAndEmptyKeysAndValues.java
+++ b/test/jdk/java/util/jar/Attributes/NullAndEmptyKeysAndValues.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,8 +21,6 @@
  * questions.
  */
 
-import static java.nio.charset.StandardCharsets.UTF_8;
-
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -31,14 +29,16 @@ import java.util.jar.Manifest;
 import java.util.jar.Attributes.Name;
 import java.lang.reflect.Field;
 
-import org.testng.annotations.Test;
-import static org.testng.Assert.*;
+import org.junit.jupiter.api.Test;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.jupiter.api.Assertions.*;
 
 /**
  * @test
  * @bug 8066619
  * @modules java.base/java.util.jar:+open
- * @run testng/othervm --enable-final-field-mutation=ALL-UNNAMED NullAndEmptyKeysAndValues
+ * @run junit/othervm --enable-final-field-mutation=ALL-UNNAMED NullAndEmptyKeysAndValues
  * @summary Tests manifests with {@code null} and empty string {@code ""}
  * values as section name, header name, or value in both main and named
  * attributes sections.
@@ -108,7 +108,7 @@ public class NullAndEmptyKeysAndValues {
         attr.set(mf, mainAtts);
         mf.getMainAttributes().put(Name.MANIFEST_VERSION, "1.0");
         mf = writeAndRead(mf);
-        assertEquals(mf.getMainAttributes().getValue(SOME_KEY), NULL_TEXT);
+        assertEquals(NULL_TEXT, mf.getMainAttributes().getValue(SOME_KEY));
     }
 
     @Test
@@ -122,7 +122,7 @@ public class NullAndEmptyKeysAndValues {
         attr.set(mf, mainAtts);
         mf.getMainAttributes().put(Name.MANIFEST_VERSION, "1.0");
         mf = writeAndRead(mf);
-        assertEquals(mf.getMainAttributes().getValue(SOME_KEY), EMPTY_STR);
+        assertEquals(EMPTY_STR, mf.getMainAttributes().getValue(SOME_KEY));
     }
 
     @Test
@@ -171,8 +171,7 @@ public class NullAndEmptyKeysAndValues {
             map.put(new Name(SOME_KEY), null);
         }});
         mf = writeAndRead(mf);
-        assertEquals(mf.getEntries().get(SOME_KEY).getValue(SOME_KEY),
-                NULL_TEXT);
+        assertEquals(NULL_TEXT, mf.getEntries().get(SOME_KEY).getValue(SOME_KEY));
     }
 
     @Test
@@ -183,8 +182,7 @@ public class NullAndEmptyKeysAndValues {
             map.put(new Name(SOME_KEY), EMPTY_STR);
         }});
         mf = writeAndRead(mf);
-        assertEquals(mf.getEntries().get(SOME_KEY).getValue(SOME_KEY),
-                EMPTY_STR);
+        assertEquals(EMPTY_STR, mf.getEntries().get(SOME_KEY).getValue(SOME_KEY));
     }
 
     static Manifest writeAndRead(Manifest mf) throws IOException {
diff --git a/test/jdk/java/util/jar/Attributes/PutAndPutAll.java b/test/jdk/java/util/jar/Attributes/PutAndPutAll.java
index f459daf8c2e..bd61ba1e92d 100644
--- a/test/jdk/java/util/jar/Attributes/PutAndPutAll.java
+++ b/test/jdk/java/util/jar/Attributes/PutAndPutAll.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 1999, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,31 +25,27 @@
    @bug 4165833 4167600
    @summary Test if put and putAll will test for illegal
             arguments.
-   */
+   @run junit PutAndPutAll
+  */
 
 
+import org.junit.jupiter.api.Test;
+
 import java.util.jar.Attributes;
 import java.util.HashMap;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 public class PutAndPutAll {
-    public static void main(String[] args) throws Exception {
+
+    @Test
+    void classCastTest() {
         Attributes at = new Attributes();
-        try{
-            at.put("this is not an Attributes.Name", "value");
-            throw new Exception("put should check for non Attributes.Name names");
-        } catch (ClassCastException e) {
-        }
-
-        try{
-            at.put(new Attributes.Name("name"), new Integer(0));
-            throw new Exception("put should check for non String values");
-        } catch (ClassCastException e) {
-        }
-
-        try {
-            at.putAll(new HashMap());
-            throw new Exception("putAll should check for non Attributes maps");
-        } catch (ClassCastException e) {
-        }
+        assertThrows(ClassCastException.class,
+                () -> at.put("this is not an Attributes.Name", "value"), "put should check for non Attributes.Name names");
+        assertThrows(ClassCastException.class,
+                () -> at.put(new Attributes.Name("name"), new Integer(0)), "put should check for non String values");
+        assertThrows(ClassCastException.class,
+                () -> at.putAll(new HashMap()), "putAll should check for non Attributes maps");
     }
 }
diff --git a/test/jdk/java/util/jar/Attributes/TestAttrsNL.java b/test/jdk/java/util/jar/Attributes/TestAttrsNL.java
index 34f7e4c4502..abfd3df6cd7 100644
--- a/test/jdk/java/util/jar/Attributes/TestAttrsNL.java
+++ b/test/jdk/java/util/jar/Attributes/TestAttrsNL.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,19 +24,28 @@
 /* @test
  * @bug 8200530
  * @summary Test Attributes newline
+ * @run junit TestAttrsNL
  */
 
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.io.IOException;
 import java.util.jar.Manifest;
 import java.util.jar.Attributes;
 import java.util.jar.Attributes.Name;
 import java.io.ByteArrayInputStream;
 import java.util.Map;
+import java.util.stream.Stream;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class TestAttrsNL {
 
-    public static void main(String[] args) throws Throwable {
+    static Stream<Arguments> newLineAttributesTest() throws IOException {
 
         String manifestStr =
             "Manifest-Version: 1.0\r\n" +
@@ -68,16 +77,16 @@ public class TestAttrsNL {
                 new Name("key44"), "value44"
         );
 
-        test(new Manifest(new ByteArrayInputStream(manifestStr.getBytes(UTF_8))),
-             mainAttrsExped, attrsExped);
+        var normal = Arguments.of(new Manifest(new ByteArrayInputStream(manifestStr.getBytes(UTF_8))),
+                mainAttrsExped, attrsExped);
 
-        test(new Manifest(new ByteArrayInputStream(
-                    manifestStr.replaceAll("\r\n", "\r").getBytes(UTF_8))),
-             mainAttrsExped, attrsExped);
+        var carriage = Arguments.of(new Manifest(new ByteArrayInputStream(
+                        manifestStr.replaceAll("\r\n", "\r").getBytes(UTF_8))),
+                mainAttrsExped, attrsExped);
 
-        test(new Manifest(new ByteArrayInputStream(
-                    manifestStr.replaceAll("\r\n", "\n").getBytes(UTF_8))),
-             mainAttrsExped, attrsExped);
+        var newLine = Arguments.of(new Manifest(new ByteArrayInputStream(
+                        manifestStr.replaceAll("\r\n", "\n").getBytes(UTF_8))),
+                mainAttrsExped, attrsExped);
 
         // mixed
         manifestStr =
@@ -93,31 +102,33 @@ public class TestAttrsNL {
             "key22: value22\n END\r\n" +
             "key33: value33\r \n" +
             "key44: value44\n";
-        test(new Manifest(new ByteArrayInputStream(manifestStr.getBytes(UTF_8))),
+        var mixed = Arguments.of(new Manifest(new ByteArrayInputStream(manifestStr.getBytes(UTF_8))),
              mainAttrsExped, attrsExped);
 
-
+        return Stream.of(normal, carriage, newLine, mixed);
     }
 
-    private static void test(Manifest m,
+    @ParameterizedTest
+    @MethodSource
+    void newLineAttributesTest(Manifest m,
                              Map<Name, String> mainAttrsExped,
                              Map<Name, String> attrsExped) {
         Attributes mainAttrs = m.getMainAttributes();
         mainAttrsExped.forEach( (k, v) -> {
-            if (!mainAttrs.containsKey(k) || !mainAttrs.get(k).equals(v)) {
-                System.out.printf(" containsKey(%s) : %b%n", k, mainAttrs.containsKey(k));
-                System.out.printf("         get(%s) : %s%n", k, mainAttrs.get(k));
-                throw new RuntimeException("expected attr: k=<" + k + ">, v=<" + v + ">");
-            }
+            var expectedMsg = "expected attr: k=<" + k + ">, v=<" + v + ">";
+            assertTrue(mainAttrs.containsKey(k),
+                    " containsKey(%s) : %b%n%s".formatted(k, mainAttrs.containsKey(k), expectedMsg));
+            assertEquals(v, mainAttrs.get(k),
+                    "         get(%s) : %s%n%s".formatted(k, mainAttrs.get(k), expectedMsg));
         });
 
         Attributes attrs = m.getAttributes("Hello");
         attrs.forEach( (k, v) -> {
-            if (!attrs.containsKey(k) || !attrs.get(k).equals(v)) {
-                System.out.printf(" containsKey(%s) : %b%n", k, attrs.containsKey(k));
-                System.out.printf("         get(%s) : %s%n", k, attrs.get(k));
-                throw new RuntimeException("expected attr: k=<" + k + ">, v=<" + v + ">");
-            }
+            var expectedMsg = "expected attr: k=<" + k + ">, v=<" + v + ">";
+            assertTrue(attrs.containsKey(k),
+                    " containsKey(%s) : %b%n%s".formatted(k, attrs.containsKey(k), expectedMsg));
+            assertEquals(v, attrs.get(k),
+                    "         get(%s) : %s%n%s".formatted(k, attrs.get(k), expectedMsg));
         });
     }
 }
diff --git a/test/jdk/java/util/jar/JarEntry/GetMethodsReturnClones.java b/test/jdk/java/util/jar/JarEntry/GetMethodsReturnClones.java
index 3c4f06dd6f0..a9b35220de3 100644
--- a/test/jdk/java/util/jar/JarEntry/GetMethodsReturnClones.java
+++ b/test/jdk/java/util/jar/JarEntry/GetMethodsReturnClones.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,20 +26,28 @@
  * @bug 6337925
  * @summary Ensure that callers cannot modify the internal JarEntry cert and
  *          codesigner arrays.
- * @author Sean Mullan
+ * @run junit GetMethodsReturnClones
  */
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
 import java.io.InputStream;
 import java.security.CodeSigner;
 import java.security.cert.Certificate;
 import java.util.*;
 import java.util.jar.*;
 
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
 public class GetMethodsReturnClones {
 
     private static final String BASE = System.getProperty("test.src", ".") +
         System.getProperty("file.separator");
+    private static List<JarEntry> jarEntries;
 
-    public static void main(String[] args) throws Exception {
+    @BeforeAll()
+    static void setupEntries() throws IOException {
         List<JarEntry> entries = new ArrayList<>();
         try (JarFile jf = new JarFile(BASE + "test.jar", true)) {
             byte[] buffer = new byte[8192];
@@ -55,23 +63,29 @@ public class GetMethodsReturnClones {
                 }
             }
         }
+        jarEntries = entries;
+    }
 
-        for (JarEntry je : entries) {
+    @Test
+    void certsTest() {
+        for (JarEntry je : jarEntries) {
             Certificate[] certs = je.getCertificates();
-            CodeSigner[] signers = je.getCodeSigners();
             if (certs != null) {
                 certs[0] = null;
                 certs = je.getCertificates();
-                if (certs[0] == null) {
-                    throw new Exception("Modified internal certs array");
-                }
+                assertNotNull(certs[0], "Modified internal certs array");
             }
+        }
+    }
+
+    @Test
+    void signersTest() {
+        for (JarEntry je : jarEntries) {
+            CodeSigner[] signers = je.getCodeSigners();
             if (signers != null) {
                 signers[0] = null;
                 signers = je.getCodeSigners();
-                if (signers[0] == null) {
-                    throw new Exception("Modified internal codesigners array");
-                }
+                assertNotNull(signers[0], "Modified internal codesigners array");
             }
         }
     }
diff --git a/test/jdk/java/util/jar/JarFile/Constructor.java b/test/jdk/java/util/jar/JarFile/Constructor.java
index 8c1a8623e61..071c68fdd9e 100644
--- a/test/jdk/java/util/jar/JarFile/Constructor.java
+++ b/test/jdk/java/util/jar/JarFile/Constructor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,55 +21,45 @@
  * questions.
  */
 
-/**
+/*
  * @test
  * @bug 4842702 8211765
  * @summary Check that constructors throw specified exceptions
- * @author Martin Buchholz
+ * @run junit Constructor
  */
 
+import org.junit.jupiter.api.Test;
+
 import java.util.jar.JarFile;
 import java.io.File;
 import java.io.IOException;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 public class Constructor {
-    private static void Unreached (Object o)
-        throws Exception
-    {
-        // Should never get here
-        throw new Exception ("Expected exception was not thrown");
-    }
 
-    public static void main(String[] args)
-        throws Exception
-    {
-        try { Unreached (new JarFile ((File) null, true, JarFile.OPEN_READ)); }
-        catch (NullPointerException e) {}
+    @Test
+    void constructorTest() {
 
-        try { Unreached (new JarFile ((File) null, true)); }
-        catch (NullPointerException e) {}
+        assertThrows(NullPointerException.class, () -> new JarFile ((File) null, true, JarFile.OPEN_READ));
 
-        try { Unreached (new JarFile ((File) null)); }
-        catch (NullPointerException e) {}
+        assertThrows(NullPointerException.class, () -> new JarFile ((File) null, true));
 
-        try { Unreached (new JarFile ((String) null, true)); }
-        catch (NullPointerException e) {}
+        assertThrows(NullPointerException.class, () -> new JarFile ((File) null));
 
-        try { Unreached (new JarFile ((String) null)); }
-        catch (NullPointerException e) {}
+        assertThrows(NullPointerException.class, () -> new JarFile ((String) null, true));
 
-        try { Unreached (new JarFile ("NoSuchJar.jar")); }
-        catch (IOException e) {}
+        assertThrows(NullPointerException.class, () -> new JarFile ((String) null));
 
-        try { Unreached (new JarFile (new File ("NoSuchJar.jar"))); }
-        catch (IOException e) {}
+        assertThrows(IOException.class, () -> new JarFile ("NoSuchJar.jar"));
+
+        assertThrows(IOException.class, () -> new JarFile (new File ("NoSuchJar.jar")));
 
         // Test that an IOExcception is thrown when an invalid charater
         // is part of the path on Windows and Unix
         final String invalidOSPath = System.getProperty("os.name")
                 .startsWith("Windows") ? "C:\\*" : "foo\u0000bar";
 
-        try { Unreached (new JarFile (invalidOSPath)); }
-        catch (IOException e) {}
+        assertThrows(IOException.class, () -> new JarFile (invalidOSPath));
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/IgnoreUnrelatedSignatureFiles.java b/test/jdk/java/util/jar/JarFile/IgnoreUnrelatedSignatureFiles.java
index 0f55702c1f6..e5a32dfde73 100644
--- a/test/jdk/java/util/jar/JarFile/IgnoreUnrelatedSignatureFiles.java
+++ b/test/jdk/java/util/jar/JarFile/IgnoreUnrelatedSignatureFiles.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,7 +21,7 @@
  * questions.
  */
 
-/**
+/*
  * @test
  * @bug 8300140
  * @summary Make sure signature related files in subdirectories of META-INF are not considered for verification
@@ -29,12 +29,14 @@
  * @modules java.base/sun.security.util
  * @modules java.base/sun.security.tools.keytool
  * @modules jdk.jartool/sun.security.tools.jarsigner
- * @run main/othervm IgnoreUnrelatedSignatureFiles
+ * @run junit/othervm IgnoreUnrelatedSignatureFiles
  */
 
 import jdk.internal.access.JavaUtilZipFileAccess;
 import jdk.internal.access.SharedSecrets;
 import jdk.security.jarsigner.JarSigner;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
 import sun.security.tools.jarsigner.Main;
 import sun.security.util.SignatureFileVerifier;
 
@@ -62,6 +64,10 @@ import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 import java.util.zip.ZipOutputStream;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
 public class IgnoreUnrelatedSignatureFiles {
 
     private static final JavaUtilZipFileAccess JUZA = SharedSecrets.getJavaUtilZipFileAccess();
@@ -69,56 +75,76 @@ public class IgnoreUnrelatedSignatureFiles {
     // This path resides in a subdirectory of META-INF, so it should not be considered signature related
     public static final String SUBDIR_SF_PATH = "META-INF/subdirectory/META-INF/SIGNER.SF";
 
+    // Jars used for testing. See `setupJars` below for setup
+    static Path j;
+    static Path s;
+    static Path m;
+    static Path sm;
+    static Path ca;
+    static Path cas;
 
-    public static void main(String[] args) throws Exception {
-
+    @BeforeAll
+    static void setupJars() throws Exception {
         // Regular signed JAR
-        Path j = createJarFile();
-        Path s = signJarFile(j, "SIGNER1", "signed");
+        j = createJarFile();
+        s = signJarFile(j, "SIGNER1", "signed");
 
         // Singed JAR with unrelated signature files
-        Path m = moveSignatureRelated(s);
-        Path sm = signJarFile(m, "SIGNER2", "modified-signed");
+        m = moveSignatureRelated(s);
+        sm = signJarFile(m, "SIGNER2", "modified-signed");
 
         // Signed JAR with custom SIG-* files
-        Path ca = createCustomAlgJar();
-        Path cas = signJarFile(ca, "SIGNER1", "custom-signed");
+        ca = createCustomAlgJar();
+        cas = signJarFile(ca, "SIGNER1", "custom-signed");
+    }
 
-        // 0: Sanity check that the basic signed JAR verifies
+    // Sanity check that the basic signed JAR verifies
+    @Test
+    void signedJarVerifyTest() throws IOException {
         try (JarFile jf = new JarFile(s.toFile(), true)) {
             Map<String, Attributes> entries = jf.getManifest().getEntries();
-            if (entries.size() != 1) {
-                throw new Exception("Expected a single manifest entry for the digest of a.txt, instead found entries: " + entries.keySet());
-            }
+            assertEquals(1, entries.size(),
+                    "Expected a single manifest entry for the digest of a.txt, instead found entries: " + entries.keySet());
             JarEntry entry = jf.getJarEntry("a.txt");
             try (InputStream in = jf.getInputStream(entry)) {
                 in.transferTo(OutputStream.nullOutputStream());
             }
         }
-        // 1: Check ZipFile.Source.isSignatureRelated
+    }
+
+    // Check ZipFile.Source.isSignatureRelated
+    @Test
+    void zipFileSourceIsSignatureRelatedTest() throws IOException {
         try (JarFile jarFile = new JarFile(m.toFile())) {
             List<String> manifestAndSignatureRelatedFiles = JUZA.getManifestAndSignatureRelatedFiles(jarFile);
             for (String signatureRelatedFile : manifestAndSignatureRelatedFiles) {
                 String dir = signatureRelatedFile.substring(0, signatureRelatedFile.lastIndexOf("/"));
-                if (!"META-INF".equals(dir)) {
-                    throw new Exception("Signature related file does not reside directly in META-INF/ : " + signatureRelatedFile);
-                }
+                assertEquals("META-INF", dir,
+                        "Signature related file does not reside directly in META-INF/ : " + signatureRelatedFile);
             }
         }
+    }
 
-        // 2: Check SignatureFileVerifier.isSigningRelated
-        if (SignatureFileVerifier.isSigningRelated(SUBDIR_SF_PATH)) {
-            throw new Exception("Signature related file does not reside directly in META-INF/ : " + SUBDIR_SF_PATH);
-        }
+    // Check SignatureFileVerifier.isSigningRelated
+    @Test
+    void sigFileVerifierIsSigningRelatedTest() {
+        assertFalse(SignatureFileVerifier.isSigningRelated(SUBDIR_SF_PATH),
+                "Signature related file does not reside directly in META-INF/ : " + SUBDIR_SF_PATH);
+    }
 
-        // 3: Check JarInputStream with doVerify = true
+    // Check JarInputStream with doVerify = true
+    @Test
+    void jarIStreamDoVerifyTest() throws IOException {
         try (JarInputStream in = new JarInputStream(Files.newInputStream(m), true)) {
-             while (in.getNextEntry() != null) {
+            while (in.getNextEntry() != null) {
                 in.transferTo(OutputStream.nullOutputStream());
             }
         }
+    }
 
-        // 4: Check that a JAR containing unrelated .SF, .RSA files is signed as-if it is unsigned
+    // Check that a JAR containing unrelated .SF, .RSA files is signed as-if it is unsigned
+    @Test
+    void unrelatedFilesUnsignedTest() throws IOException {
         try (ZipFile zf = new ZipFile(sm.toFile())) {
             ZipEntry mf = zf.getEntry("META-INF/MANIFEST.MF");
             try (InputStream stream = zf.getInputStream(mf)) {
@@ -126,19 +152,24 @@ public class IgnoreUnrelatedSignatureFiles {
                 // When JarSigner considers a jar to not be already signed,
                 // the 'Manifest-Version' attributed name will be case-normalized
                 // Assert that manifest-version is not in lowercase
-                if (manifest.startsWith("manifest-version")) {
-                    throw new Exception("JarSigner unexpectedly treated unsigned jar as signed");
-                }
+                assertFalse(manifest.startsWith("manifest-version"),
+                        "JarSigner unexpectedly treated unsigned jar as signed");
             }
         }
+    }
 
-        // 5: Check that a JAR containing non signature related .SF, .RSA files can be signed
+    // Check that a JAR containing non signature related .SF, .RSA files can be signed
+    @Test
+    void nonSigFileIsSignableTest() throws Exception {
         try (JarFile jf = new JarFile(sm.toFile(), true)) {
             checkSignedBy(jf, "a.txt", "CN=SIGNER2");
             checkSignedBy(jf, "META-INF/subdirectory/META-INF/SIGNER1.SF", "CN=SIGNER2");
         }
+    }
 
-        // 6: Check that JarSigner does not move unrelated [SF,RSA] files to the beginning of signed JARs
+    // Check that JarSigner does not move unrelated [SF,RSA] files to the beginning of signed JARs
+    @Test
+    void jarSignerDoesNotMoveUnrelatedTest() throws IOException {
         try (JarFile zf = new JarFile(sm.toFile())) {
 
             List<String> actualOrder = zf.stream().map(ZipEntry::getName).toList();
@@ -154,23 +185,25 @@ public class IgnoreUnrelatedSignatureFiles {
                     "META-INF/subdirectory2/META-INF/SIGNER1.RSA"
             );
 
-            if (!expectedOrder.equals(actualOrder)) {
-                String msg = ("""
+            assertEquals(expectedOrder, actualOrder, ("""
                         Unexpected file order in JAR with unrelated SF,RSA files
                         Expected order: %s
                         Actual order: %s""")
-                        .formatted(expectedOrder, actualOrder);
-                throw new Exception(msg);
-            }
+                    .formatted(expectedOrder, actualOrder));
         }
+    }
 
-        // 7: Check that jarsigner ignores unrelated signature files
+    // Check that jarsigner ignores unrelated signature files
+    @Test
+    void jarSignerIgnoresUnrelatedTest() throws Exception {
         String message = jarSignerVerify(m);
-        if (message.contains("WARNING")) {
-            throw new Exception("jarsigner output contains unexpected  warning: " +message);
-        }
+        assertFalse(message.contains("WARNING"),
+                "jarsigner output contains unexpected  warning: " + message);
+    }
 
-        // 8: Check that SignatureFileVerifier.isSigningRelated handles custom SIG-* files correctly
+    //  Check that SignatureFileVerifier.isSigningRelated handles custom SIG-* files correctly
+    @Test
+    void customSIGFilesTest() throws IOException {
         try (JarFile jf = new JarFile(cas.toFile(), true)) {
 
             // These files are not signature-related and should be signed
@@ -185,10 +218,9 @@ public class IgnoreUnrelatedSignatureFiles {
 
             Set<String> actualSigned = jf.getManifest().getEntries().keySet();
 
-            if (!expectedSigned.equals(actualSigned)) {
-                throw new Exception("Unexpected MANIFEST entries. Expected %s, got %s"
-                        .formatted(expectedSigned, actualSigned));
-            }
+            assertEquals(expectedSigned, actualSigned,
+                    "Unexpected MANIFEST entries. Expected %s, got %s"
+                            .formatted(expectedSigned, actualSigned));
         }
     }
 
@@ -220,22 +252,17 @@ public class IgnoreUnrelatedSignatureFiles {
 
         // Verify that the entry is signed
         CodeSigner[] signers = je.getCodeSigners();
-        if (signers == null) {
-            throw new Exception(String.format("Expected %s to be signed", name));
-        }
+        assertNotNull(signers, "Expected %s to be signed".formatted(name));
 
         // There should be a single signer
-        if (signers.length != 1) {
-            throw new Exception(String.format("Expected %s to be signed by exactly one signer", name));
-        }
+        assertEquals(1, signers.length,
+                "Expected %s to be signed by exactly one signer".formatted(name));
 
         String actualSigner = ((X509Certificate) signers[0]
                 .getSignerCertPath().getCertificates().get(0))
                 .getIssuerX500Principal().getName();
-
-        if (!actualSigner.equals(expectedSigner)) {
-            throw new Exception(String.format("Expected %s to be signed by %s, was signed by %s", name, expectedSigner, actualSigner));
-        }
+        assertEquals(expectedSigner, actualSigner,
+                "Expected %s to be signed by %s, was signed by %s".formatted(name, expectedSigner, actualSigner));
     }
 
     /**
diff --git a/test/jdk/java/util/jar/JarFile/JarBacktickManifest.java b/test/jdk/java/util/jar/JarFile/JarBacktickManifest.java
index 65d54a67a47..66edf3ae3ee 100644
--- a/test/jdk/java/util/jar/JarFile/JarBacktickManifest.java
+++ b/test/jdk/java/util/jar/JarFile/JarBacktickManifest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,7 +27,7 @@
  * @summary Make sure scanning manifest doesn't throw AIOOBE on certain strings containing backticks.
  * @library /test/lib/
  * @build jdk.test.lib.util.JarBuilder
- * @run testng JarBacktickManifest
+ * @run junit JarBacktickManifest
  */
 
 import java.io.File;
@@ -35,19 +35,20 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.util.jar.JarFile;
 
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
-
 import jdk.test.lib.util.JarBuilder;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
 public class JarBacktickManifest {
 
     public static final String VERIFY_MANIFEST_JAR = "verifyManifest.jar";
 
-    @BeforeClass
-    public void initialize() throws Exception {
+    @BeforeAll
+    public static void initialize() throws Exception {
         JarBuilder jb = new JarBuilder(VERIFY_MANIFEST_JAR);
         jb.addAttribute("Test", " Class-`Path` ");
         jb.addAttribute("Test2", " Multi-`Release ");
@@ -55,14 +56,14 @@ public class JarBacktickManifest {
     }
 
     @Test
-    public void test() throws Exception {
+    public void backtickTest() throws Exception {
         try (JarFile jf = new JarFile(VERIFY_MANIFEST_JAR)) {  // do not set runtime versioning
-            Assert.assertFalse(jf.isMultiRelease(), "Shouldn't be multi-release");
+            assertFalse(jf.isMultiRelease(), "Shouldn't be multi-release");
         }
     }
 
-    @AfterClass
-    public void close() throws IOException {
+    @AfterAll
+    public static void close() throws IOException {
         Files.delete(new File(VERIFY_MANIFEST_JAR).toPath());
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/JarNoManifest.java b/test/jdk/java/util/jar/JarFile/JarNoManifest.java
index 971ce92f9e9..31301e28975 100644
--- a/test/jdk/java/util/jar/JarFile/JarNoManifest.java
+++ b/test/jdk/java/util/jar/JarFile/JarNoManifest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,18 +24,25 @@
 /* @test
    @bug 4771616
    @summary JarFile.maybeInstantiateVerifier must check for absence of manifest
+   @run junit JarNoManifest
  */
 
+import org.junit.jupiter.api.Test;
+
 import java.io.*;
 import java.util.jar.*;
 import java.util.zip.*;
 
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
 public class JarNoManifest {
-  public static void main(String[] args) throws Exception {
-    File f = new File(System.getProperty("test.src","."), "no-manifest.jar");
-    JarFile jar = new JarFile(f);
-    ZipEntry entry = jar.getEntry("JarNoManifest.java");
-    // The following throws a NullPointerException when the bug is present
-    InputStream in = jar.getInputStream(entry);
-  }
+
+    @Test
+    void absentManifestTest() throws IOException {
+        File f = new File(System.getProperty("test.src", "."), "no-manifest.jar");
+        JarFile jar = new JarFile(f);
+        ZipEntry entry = jar.getEntry("JarNoManifest.java");
+        // The following throws a NullPointerException when the bug is present
+        assertDoesNotThrow(() -> jar.getInputStream(entry));
+    }
 }
diff --git a/test/jdk/java/util/jar/JarFile/MevNPE.java b/test/jdk/java/util/jar/JarFile/MevNPE.java
index f8627d33324..20ac9f2d796 100644
--- a/test/jdk/java/util/jar/JarFile/MevNPE.java
+++ b/test/jdk/java/util/jar/JarFile/MevNPE.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,22 +24,27 @@
 /* @test
  * @bug 7023056
  * @summary NPE from sun.security.util.ManifestEntryVerifier.verify during Maven build
+ * @run junit MevNPE
  */
+import org.junit.jupiter.api.Test;
+
 import java.io.*;
 import java.util.jar.*;
 
 public class MevNPE {
-    public static void main(String[] args) throws Exception {
+
+    @Test
+    void noNpeTest() throws IOException {
         File f = new File(System.getProperty("test.src", "."), "Signed.jar");
         try (JarFile jf = new JarFile(f, true)) {
             try (InputStream s1 = jf.getInputStream(
                     jf.getJarEntry(JarFile.MANIFEST_NAME))) {
                 s1.read(new byte[10000]);
-            };
+            }
             try (InputStream s2 = jf.getInputStream(
                     jf.getJarEntry(JarFile.MANIFEST_NAME))) {
                 s2.read(new byte[10000]);
-            };
+            }
         }
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/ScanSignedJar.java b/test/jdk/java/util/jar/JarFile/ScanSignedJar.java
index fe49cea24aa..75b4732645d 100644
--- a/test/jdk/java/util/jar/JarFile/ScanSignedJar.java
+++ b/test/jdk/java/util/jar/JarFile/ScanSignedJar.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,29 +21,35 @@
  * questions.
  */
 
-/**
+/*
  * @test
  * @bug 4953126
  * @summary Check that a signed JAR file containing an unsupported signer info
  *          attribute can be parsed successfully.
+ * @run junit ScanSignedJar
  */
 
+import org.junit.jupiter.api.Test;
+
 import java.io.File;
+import java.io.IOException;
 import java.io.InputStream;
-import java.security.cert.Certificate;
 import java.util.Enumeration;
 import java.util.jar.*;
 
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
 public class ScanSignedJar {
 
-    public static void main(String[] args) throws Exception {
+    @Test
+    void unsupportedSignerTest() throws IOException {
         boolean isSigned = false;
         try (JarFile file = new JarFile(new File(System.getProperty("test.src","."),
-                 "bogus-signerinfo-attr.jar"))) {
+                "bogus-signerinfo-attr.jar"))) {
             byte[] buffer = new byte[8192];
 
-            for (Enumeration entries = file.entries(); entries.hasMoreElements();) {
-                JarEntry entry = (JarEntry) entries.nextElement();
+            for (Enumeration<JarEntry> entries = file.entries(); entries.hasMoreElements();) {
+                JarEntry entry = entries.nextElement();
                 try (InputStream jis = file.getInputStream(entry)) {
                     while (jis.read(buffer, 0, buffer.length) != -1) {
                         // read the jar entry
@@ -53,14 +59,9 @@ public class ScanSignedJar {
                     isSigned = true;
                 }
                 System.out.println((isSigned ? "[signed] " : "\t ") +
-                    entry.getName());
+                        entry.getName());
             }
         }
-
-        if (isSigned) {
-            System.out.println("\nJAR file has signed entries");
-        } else {
-            throw new Exception("Failed to detect that the JAR file is signed");
-        }
+        assertTrue(isSigned, "Failed to detect that the JAR file is signed");
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/SignedJarFileGetInputStream.java b/test/jdk/java/util/jar/JarFile/SignedJarFileGetInputStream.java
index 84ad357079d..9e524d5afd0 100644
--- a/test/jdk/java/util/jar/JarFile/SignedJarFileGetInputStream.java
+++ b/test/jdk/java/util/jar/JarFile/SignedJarFileGetInputStream.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,45 +24,38 @@
 /* @test
  * @bug 4845692 8206863
  * @summary JarFile.getInputStream should not throw when jar file is signed
- * @author Martin Buchholz
+ * @run junit SignedJarFileGetInputStream
  */
 
+import org.junit.jupiter.api.Test;
+
 import java.io.*;
 import java.util.*;
 import java.util.jar.*;
 import java.util.zip.*;
 
-public class SignedJarFileGetInputStream {
-    public static void main(String args[]) throws Throwable {
-        JarFile jar = new JarFile(
-            new File(System.getProperty("test.src", "."), "Signed.jar"));
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
+public class SignedJarFileGetInputStream {
+
+    @Test
+    void signedJarTest() throws IOException {
+        JarFile jar = new JarFile(
+                new File(System.getProperty("test.src", "."), "Signed.jar"));
         for (Enumeration e = jar.entries(); e.hasMoreElements();) {
             JarEntry entry = (JarEntry) e.nextElement();
-            InputStream is = jar.getInputStream(new ZipEntry(entry.getName()));
+            InputStream is = assertDoesNotThrow(() -> jar.getInputStream(new ZipEntry(entry.getName())));
             is.close();
         }
-
         // read(), available() on closed stream should throw IOException
         InputStream is = jar.getInputStream(new ZipEntry("Test.class"));
         is.close();
         byte[] buffer = new byte[1];
 
-        try {
-            is.read();
-            throw new AssertionError("Should have thrown IOException");
-        } catch (IOException success) {}
-        try {
-            is.read(buffer);
-            throw new AssertionError("Should have thrown IOException");
-        } catch (IOException success) {}
-        try {
-            is.read(buffer, 0, buffer.length);
-            throw new AssertionError("Should have thrown IOException");
-        } catch (IOException success) {}
-        try {
-            is.available();
-            throw new AssertionError("Should have thrown IOException");
-        } catch (IOException success) {}
+        assertThrows(IOException.class, () -> is.read());
+        assertThrows(IOException.class, () -> is.read(buffer));
+        assertThrows(IOException.class, () -> is.read(buffer, 0, buffer.length));
+        assertThrows(IOException.class, () -> is.available());
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/SignedJarPendingBlock.java b/test/jdk/java/util/jar/JarFile/SignedJarPendingBlock.java
index a6f9955a507..a6326be622a 100644
--- a/test/jdk/java/util/jar/JarFile/SignedJarPendingBlock.java
+++ b/test/jdk/java/util/jar/JarFile/SignedJarPendingBlock.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,15 +21,21 @@
  * questions.
  */
 
-/**
+/*
  * @test
  * @modules java.base/sun.security.tools.keytool
  * @summary JARs with pending block files (where .RSA comes before .SF) should verify correctly
+ * @run junit SignedJarPendingBlock
  */
 
 import jdk.security.jarsigner.JarSigner;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.FieldSource;
 
 import java.io.File;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
@@ -42,32 +48,47 @@ import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 import java.util.zip.ZipOutputStream;
 
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 public class SignedJarPendingBlock {
 
-    public static void main(String[] args) throws Exception {
+    static Path signed;
+    static Path pendingBlocks;
+    static Path invalid;
+
+    // Construct the test data
+    @BeforeAll
+    static void setup() throws Exception {
         Path jar = createJarFile();
-        Path signed = signJarFile(jar);
-        Path pendingBlocks = moveBlockFirst(signed);
-        Path invalid = invalidate(pendingBlocks);
-
-        // 1: Regular signed JAR with no pending blocks should verify
-        checkSigned(signed);
-
-        // 2: Signed jar with pending blocks should verify
-        checkSigned(pendingBlocks);
-
-        // 3: Invalid signed jar with pending blocks should throw SecurityException
-        try {
-            checkSigned(invalid);
-            throw new Exception("Expected invalid digest to be detected");
-        } catch (SecurityException se) {
-            // Ignore
-        }
+        signed = signJarFile(jar);
+        pendingBlocks = moveBlockFirst(signed);
+        invalid = invalidate(pendingBlocks);
     }
 
-    private static void checkSigned(Path b) throws Exception {
-        try (JarFile jf = new JarFile(b.toFile(), true)) {
+    // Regular signed JAR with no pending blocks should verify
+    @Test
+    void checkValidSignedJar() {
+        assertDoesNotThrow(() -> checkSigned(signed),
+                "Valid digest should not fail");
+    }
 
+    // Signed jar with pending blocks should verify
+    @Test
+    void checkValidSignedPendingJar() {
+        assertDoesNotThrow(() -> checkSigned(pendingBlocks),
+                "Valid digest should not fail");
+    }
+
+    // Invalid signed jar with pending blocks should throw SecurityException
+    @Test
+    void checkInvalidSignedJar() {
+        assertThrows(SecurityException.class, () -> checkSigned(invalid),
+                "Expected invalid digest to be detected");
+    }
+
+    private static void checkSigned(Path b) throws IOException {
+        try (JarFile jf = new JarFile(b.toFile(), true)) {
             JarEntry je = jf.getJarEntry("a.txt");
             try (InputStream in = jf.getInputStream(je)) {
                 in.transferTo(OutputStream.nullOutputStream());
diff --git a/test/jdk/java/util/jar/JarFile/SorryClosed.java b/test/jdk/java/util/jar/JarFile/SorryClosed.java
index 19481347394..38950539c57 100644
--- a/test/jdk/java/util/jar/JarFile/SorryClosed.java
+++ b/test/jdk/java/util/jar/JarFile/SorryClosed.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,43 +24,49 @@
 /* @test
  * @bug 4910572
  * @summary Accessing a closed jar file should generate IllegalStateException.
- * @author Martin Buchholz
+ * @run junit SorryClosed
 */
 
+import org.junit.jupiter.api.Test;
+
 import java.io.IOException;
 import java.io.File;
 import java.util.jar.JarFile;
 import java.util.zip.ZipEntry;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 public class SorryClosed {
-    public static void main(String args[]) throws IOException {
 
-        File file = new File(System.getProperty("test.src","."), "test.jar");
-        String testEntryName = "test.class";
+    private static final File file = new File(System.getProperty("test.src", "."), "test.jar");
+    private static final String testEntryName = "test.class";
 
-        try {
-            JarFile f = new JarFile(file);
-            ZipEntry e = f.getEntry(testEntryName);
-            f.close();
-            f.getInputStream(e);
-        } catch (IllegalStateException e) {} // OK
+    @Test
+    void getInputStreamTest() throws IOException {
+        JarFile f = new JarFile(file);
+        ZipEntry e = f.getEntry(testEntryName);
+        f.close();
+        assertThrows(IllegalStateException.class, () -> f.getInputStream(e));
+    }
 
-        try {
-            JarFile f = new JarFile(file);
-            f.close();
-            f.getEntry(testEntryName);
-        } catch (IllegalStateException e) {} // OK
+    @Test
+    void getEntryTest() throws IOException {
+        JarFile f = new JarFile(file);
+        f.close();
+        assertThrows(IllegalStateException.class, () -> f.getEntry(testEntryName));
+    }
 
-        try {
-            JarFile f = new JarFile(file);
-            f.close();
-            f.getJarEntry(testEntryName);
-        } catch (IllegalStateException e) {} // OK
+    @Test
+    void getJarEntryTest() throws IOException {
+        JarFile f = new JarFile(file);
+        f.close();
+        assertThrows(IllegalStateException.class, () -> f.getJarEntry(testEntryName));
+    }
 
-        try {
-            JarFile f = new JarFile(file);
-            f.close();
-            f.getManifest();
-        } catch (IllegalStateException e) {} // OK
+    @Test
+    void getManifestTest() throws IOException {
+        JarFile f = new JarFile(file);
+        f.close();
+        assertThrows(IllegalStateException.class, f::getManifest);
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/TurkCert.java b/test/jdk/java/util/jar/JarFile/TurkCert.java
index 68e3d83e002..216fd535e2b 100644
--- a/test/jdk/java/util/jar/JarFile/TurkCert.java
+++ b/test/jdk/java/util/jar/JarFile/TurkCert.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,38 +21,35 @@
  * questions.
  */
 
-/**
+/*
  * @test
  * @bug 4624534
  * @summary Make sure jar certificates work for Turkish locale
- * @author kladko
+ * @run junit/othervm -Duser.language=tr -Duser.country=TR TurkCert
  */
 
+import org.junit.jupiter.api.Test;
+
 import java.util.*;
 import java.util.jar.*;
 import java.security.cert.*;
 import java.io.*;
 
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
 public class TurkCert {
-    public static void main(String[] args) throws Exception{
-        Locale reservedLocale = Locale.getDefault();
-        try {
-            Locale.setDefault(Locale.of("tr", "TR"));
-            File f = new File(System.getProperty("test.src","."), "test.jar");
-            try (JarFile jf = new JarFile(f, true)) {
-                JarEntry je = (JarEntry)jf.getEntry("test.class");
-                try (InputStream is = jf.getInputStream(je)) {
-                    byte[] b = new byte[1024];
-                    while (is.read(b) != -1) {
-                    }
-                }
-                if (je.getCertificates() == null) {
-                    throw new Exception("Null certificate for test.class.");
+
+    @Test
+    void turkishLocaleTest() throws IOException {
+        File f = new File(System.getProperty("test.src", "."), "test.jar");
+        try (JarFile jf = new JarFile(f, true)) {
+            JarEntry je = (JarEntry)jf.getEntry("test.class");
+            try (InputStream is = jf.getInputStream(je)) {
+                byte[] b = new byte[1024];
+                while (is.read(b) != -1) {
                 }
             }
-        } finally {
-            // restore the default locale
-            Locale.setDefault(reservedLocale);
+            assertNotNull(je.getCertificates(), "Null certificate for test.class.");
         }
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/VerifySignedJar.java b/test/jdk/java/util/jar/JarFile/VerifySignedJar.java
index bd5490502c9..e1602c0aa46 100644
--- a/test/jdk/java/util/jar/JarFile/VerifySignedJar.java
+++ b/test/jdk/java/util/jar/JarFile/VerifySignedJar.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,18 +21,20 @@
  * questions.
  */
 
-/**
+/*
  * @test
- * @library /test/lib
  * @modules java.base/sun.security.x509
  * @modules java.base/sun.security.tools.keytool
  * @bug 4419266 4842702
  * @summary Make sure verifying signed Jar doesn't throw SecurityException
+ * @run junit VerifySignedJar
  */
 import jdk.security.jarsigner.JarSigner;
+import org.junit.jupiter.api.Test;
 import sun.security.tools.keytool.CertAndKeyGen;
 import sun.security.x509.X500Name;
 
+import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -40,21 +42,24 @@ import java.security.KeyStore;
 import java.security.cert.Certificate;
 import java.security.cert.X509Certificate;
 import java.util.Collections;
-import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 import java.util.jar.JarOutputStream;
-import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 
-import static jdk.test.lib.Utils.runAndCheckException;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
 
 
 public class VerifySignedJar {
 
-    public static void main(String[] args) throws Exception {
-
+    @Test
+    void signedJarSecurityExceptionTest() throws Exception {
         Path j = createJar();
         Path s = signJar(j, keyEntry("cn=duke"));
 
@@ -70,38 +75,30 @@ public class VerifySignedJar {
             }
 
             // Read ZIP and JAR entries by name
-            Objects.requireNonNull(jf.getEntry("getprop.class"));
-            Objects.requireNonNull(jf.getJarEntry("getprop.class"));
+            assertNotNull(jf.getEntry("getprop.class"));
+            assertNotNull(jf.getJarEntry("getprop.class"));
 
             // Make sure we throw NPE on null parameters
-            runAndCheckException(() -> jf.getEntry(null), NullPointerException.class);
-            runAndCheckException(() -> jf.getJarEntry(null), NullPointerException.class);
-            runAndCheckException(() -> jf.getInputStream(null), NullPointerException.class);
+            assertThrows(NullPointerException.class, () -> jf.getEntry(null));
+            assertThrows(NullPointerException.class, () -> jf.getJarEntry(null));
+            assertThrows(NullPointerException.class, () -> jf.getInputStream(null));
 
         } catch (SecurityException se) {
-            throw new Exception("Got SecurityException when verifying signed " +
-                "jar:" + se);
+            fail("Got SecurityException when verifying signed jar:" + se);
         }
     }
 
     // Check that a JAR entry is signed by an expected DN
-    private static void checkSignedBy(JarEntry e, String expectedDn) throws Exception {
+    private static void checkSignedBy(JarEntry e, String expectedDn) {
         Certificate[] certs = e.getCertificates();
-        if (certs == null || certs.length == 0) {
-            throw new Exception("JarEntry has no certificates: " + e.getName());
-        }
-
-        if (certs[0] instanceof X509Certificate x) {
-            String name = x.getSubjectX500Principal().getName();
-            if (!name.equalsIgnoreCase(expectedDn)) {
-                throw new Exception("Expected entry signed by %s, was %s".formatted(name, expectedDn));
-            }
-        } else {
-            throw new Exception("Expected JarEntry.getCertificate to return X509Certificate");
-        }
+        assertNotNull(certs, "JarEntry has no certificates: " + e.getName());
+        assertNotEquals(0, certs.length, "JarEntry has no certificates: " + e.getName());
+        var x = assertInstanceOf(X509Certificate.class, certs[0], "Expected JarEntry.getCertificate to return X509Certificate");
+        String name = x.getSubjectX500Principal().getName();
+        assertTrue(name.equalsIgnoreCase(expectedDn), "Expected entry signed by %s, was %s".formatted(name, expectedDn));
     }
 
-    private static Path createJar() throws Exception {
+    private static Path createJar() throws IOException {
         Path j = Path.of("unsigned.jar");
         try (JarOutputStream out = new JarOutputStream(Files.newOutputStream(j))){
             out.putNextEntry(new JarEntry("getprop.class"));
diff --git a/test/jdk/java/util/jar/JarFile/jarVerification/MultiProviderTest.java b/test/jdk/java/util/jar/JarFile/jarVerification/MultiProviderTest.java
index 4d191d7b3cd..b4b7fda081e 100644
--- a/test/jdk/java/util/jar/JarFile/jarVerification/MultiProviderTest.java
+++ b/test/jdk/java/util/jar/JarFile/jarVerification/MultiProviderTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -33,8 +33,7 @@
  *        jdk.test.lib.JDKToolLauncher
  *        MultiThreadLoad FooService
  * @modules java.base/jdk.internal.access:+open
- * @run main MultiProviderTest
- * @run main MultiProviderTest sign
+ * @run junit MultiProviderTest
  */
 
 import java.io.File;
@@ -51,27 +50,33 @@ import jdk.test.lib.compiler.CompilerUtils;
 import jdk.test.lib.process.OutputAnalyzer;
 import jdk.test.lib.process.ProcessTools;
 import jdk.test.lib.util.JarUtils;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
 
 import static java.nio.file.StandardOpenOption.CREATE;
 import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
 import static java.util.Arrays.asList;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 public class MultiProviderTest {
 
     private static final String METAINFO = "META-INF/services/FooService";
-    private static String COMBO_CP = Utils.TEST_CLASS_PATH + File.pathSeparator;
     private static String TEST_CLASS_PATH = System.getProperty("test.classes", ".");
-    private static boolean signJars = false;
     static final int NUM_JARS = 5;
 
+    // Reset per each test run under JUnit default lifecycle
+    private boolean signJars = false;
+    private String COMBO_CP = Utils.TEST_CLASS_PATH + File.pathSeparator;
 
     private static final String KEYSTORE = "keystore.jks";
     private static final String ALIAS = "JavaTest";
     private static final String STOREPASS = "changeit";
     private static final String KEYPASS = "changeit";
 
-    public static void main(String[] args) throws Throwable {
-        signJars = args.length >=1 && args[0].equals("sign");
+    @ParameterizedTest
+    @ValueSource(booleans = {true, false})
+    void classLoadingTest(boolean sign) throws Throwable {
+        signJars = sign;
         initialize();
         List<String> cmds = new ArrayList<>();
         cmds.add(JDKToolFinder.getJDKTool("java"));
@@ -86,18 +91,16 @@ public class MultiProviderTest {
                 "MultiThreadLoad",
                 TEST_CLASS_PATH));
 
-        try {
+        assertDoesNotThrow(() -> {
             OutputAnalyzer outputAnalyzer = ProcessTools.executeCommand(cmds.stream()
-                    .filter(t -> !t.isEmpty())
-                    .toArray(String[]::new))
+                            .filter(t -> !t.isEmpty())
+                            .toArray(String[]::new))
                     .shouldHaveExitValue(0);
             System.out.println("Output:" + outputAnalyzer.getOutput());
-        } catch (Throwable t) {
-            throw new RuntimeException("Unexpected fail.", t);
-        }
+        });
     }
 
-    public static void initialize() throws Throwable {
+    public void initialize() throws Throwable {
         if (signJars) {
             genKey();
         }
diff --git a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarAPI.java b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarAPI.java
index e8abec354ed..1ba25ef6985 100644
--- a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarAPI.java
+++ b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarAPI.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -31,7 +31,7 @@
  *        CreateMultiReleaseTestJars
  *        jdk.test.lib.compiler.Compiler
  *        jdk.test.lib.util.JarBuilder
- * @run testng MultiReleaseJarAPI
+ * @run junit MultiReleaseJarAPI
  */
 
 import java.io.File;
@@ -44,37 +44,41 @@ import java.util.Map;
 import java.util.Random;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.jar.JarFile;
+import java.util.stream.Stream;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 
 import jdk.test.lib.RandomFactory;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.DataProvider;
-import org.testng.annotations.Test;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.*;
 
 public class MultiReleaseJarAPI {
 
     private static final Random RANDOM = RandomFactory.getRandom();
 
-    String userdir = System.getProperty("user.dir",".");
-    CreateMultiReleaseTestJars creator =  new CreateMultiReleaseTestJars();
-    File unversioned = new File(userdir, "unversioned.jar");
-    File multirelease = new File(userdir, "multi-release.jar");
-    File signedmultirelease = new File(userdir, "signed-multi-release.jar");
+    private static final String userdir = System.getProperty("user.dir", ".");
+    private static final CreateMultiReleaseTestJars creator = new CreateMultiReleaseTestJars();
+    private static final File unversioned = new File(userdir, "unversioned.jar");
+    private static final File multirelease = new File(userdir, "multi-release.jar");
+    private static final File signedmultirelease = new File(userdir, "signed-multi-release.jar");
 
-
-    @BeforeClass
-    public void initialize() throws Exception {
+    @BeforeAll
+    public static void initialize() throws Exception {
         creator.compileEntries();
         creator.buildUnversionedJar();
         creator.buildMultiReleaseJar();
         creator.buildSignedMultiReleaseJar();
     }
 
-    @AfterClass
-    public void close() throws IOException {
+    @AfterAll
+    public static void close() throws IOException {
         Files.delete(unversioned.toPath());
         Files.delete(multirelease.toPath());
         Files.delete(signedmultirelease.toPath());
@@ -83,19 +87,19 @@ public class MultiReleaseJarAPI {
     @Test
     public void isMultiReleaseJar() throws Exception {
         try (JarFile jf = new JarFile(unversioned)) {
-            Assert.assertFalse(jf.isMultiRelease());
+            assertFalse(jf.isMultiRelease());
         }
 
         try (JarFile jf = new JarFile(unversioned, true, ZipFile.OPEN_READ, Runtime.version())) {
-            Assert.assertFalse(jf.isMultiRelease());
+            assertFalse(jf.isMultiRelease());
         }
 
         try (JarFile jf = new JarFile(multirelease)) {
-            Assert.assertTrue(jf.isMultiRelease());
+            assertTrue(jf.isMultiRelease());
         }
 
         try (JarFile jf = new JarFile(multirelease, true, ZipFile.OPEN_READ, Runtime.version())) {
-            Assert.assertTrue(jf.isMultiRelease());
+            assertTrue(jf.isMultiRelease());
         }
 
         testCustomMultiReleaseValue("true", true);
@@ -155,45 +159,46 @@ public class MultiReleaseJarAPI {
         creator.buildCustomMultiReleaseJar(fileName, value, extraAttributes);
         File custom = new File(userdir, fileName);
         try (JarFile jf = new JarFile(custom, true, ZipFile.OPEN_READ, Runtime.version())) {
-            Assert.assertEquals(jf.isMultiRelease(), expected);
+            assertEquals(expected, jf.isMultiRelease());
         }
         Files.delete(custom.toPath());
     }
 
-    @DataProvider(name = "versions")
-    public Object[][] createVersionData() throws Exception {
-        return new Object[][]{
-                {JarFile.baseVersion(), 8},
-                {JarFile.runtimeVersion(), Runtime.version().major()},
-                {Runtime.version(), Runtime.version().major()},
-                {Runtime.Version.parse("7.1"), JarFile.baseVersion().major()},
-                {Runtime.Version.parse("9"), 9},
-                {Runtime.Version.parse("9.1.5-ea+200"), 9}
-        };
+    public static Stream<Arguments> createVersionData() {
+        return Stream.of(
+                Arguments.of(JarFile.baseVersion(), 8),
+                Arguments.of(JarFile.runtimeVersion(), Runtime.version().major()),
+                Arguments.of(Runtime.version(), Runtime.version().major()),
+                Arguments.of(Runtime.Version.parse("7.1"), JarFile.baseVersion().major()),
+                Arguments.of(Runtime.Version.parse("9"), 9),
+                Arguments.of(Runtime.Version.parse("9.1.5-ea+200"), 9)
+        );
     }
 
-    @Test(dataProvider="versions")
+    @ParameterizedTest
+    @MethodSource("createVersionData")
     public void testVersioning(Runtime.Version value, int xpected) throws Exception {
         Runtime.Version expected = Runtime.Version.parse(String.valueOf(xpected));
         Runtime.Version base = JarFile.baseVersion();
 
         // multi-release jar, opened as unversioned
         try (JarFile jar = new JarFile(multirelease)) {
-            Assert.assertEquals(jar.getVersion(), base);
+            assertEquals(base, jar.getVersion());
         }
 
         System.err.println("test versioning for Release " + value);
         try (JarFile jf = new JarFile(multirelease, true, ZipFile.OPEN_READ, value)) {
-            Assert.assertEquals(jf.getVersion(), expected);
+            assertEquals(expected, jf.getVersion());
         }
 
         // regular, unversioned, jar
         try (JarFile jf = new JarFile(unversioned, true, ZipFile.OPEN_READ, value)) {
-            Assert.assertEquals(jf.getVersion(), base);
+            assertEquals(base, jf.getVersion());
         }
     }
 
-    @Test(dataProvider="versions")
+    @ParameterizedTest
+    @MethodSource("createVersionData")
     public void testAliasing(Runtime.Version version, int xpected) throws Exception {
         int n = Math.max(version.major(), JarFile.baseVersion().major());
         Runtime.Version value = Runtime.Version.parse(String.valueOf(n));
@@ -231,7 +236,7 @@ public class MultiReleaseJarAPI {
         }
         assert versionedBytes.length > 0;
 
-        Assert.assertTrue(Arrays.equals(baseBytes, versionedBytes));
+        assertTrue(Arrays.equals(baseBytes, versionedBytes));
     }
 
     @Test
@@ -243,11 +248,11 @@ public class MultiReleaseJarAPI {
         try (JarFile jf = new JarFile(multirelease)) {
             ze1 = jf.getEntry(vname);
         }
-        Assert.assertEquals(ze1.getName(), vname);
+        assertEquals(vname, ze1.getName());
         try (JarFile jf = new JarFile(multirelease, true, ZipFile.OPEN_READ, Runtime.Version.parse("9"))) {
             ze2 = jf.getEntry(rname);
         }
-        Assert.assertEquals(ze2.getName(), rname);
-        Assert.assertNotEquals(ze1.getName(), ze2.getName());
+        assertEquals(rname, ze2.getName());
+        assertNotEquals(ze2.getName(), ze1.getName());
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarHttpProperties.java b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarHttpProperties.java
index 16f764c6674..7d3a933a619 100644
--- a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarHttpProperties.java
+++ b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarHttpProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -31,17 +31,17 @@
  * @build CreateMultiReleaseTestJars
  *        jdk.test.lib.compiler.Compiler
  *        jdk.test.lib.util.JarBuilder
- * @run testng MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=0   MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=8   MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=9   MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=100 MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarHttpProperties
- * @run testng/othervm -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarHttpProperties
+ * @run junit MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=0   MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=8   MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=9   MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=100 MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarHttpProperties
+ * @run junit/othervm -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarHttpProperties
  */
 
 import java.io.IOException;
@@ -56,16 +56,19 @@ import java.util.concurrent.Executors;
 import com.sun.net.httpserver.HttpServer;
 import com.sun.net.httpserver.SimpleFileServer;
 import jdk.test.lib.net.URIBuilder;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
 public class MultiReleaseJarHttpProperties extends MultiReleaseJarProperties {
     private HttpServer server;
     private ExecutorService executor;
     static final String TESTCONTEXT = "/multi-release.jar";  //mapped to local file path
 
-    @BeforeClass
+    @BeforeAll
     public void initialize() throws Exception {
         server = SimpleFileServer.createFileServer(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0),
                 Path.of(System.getProperty("user.dir", ".")), SimpleFileServer.OutputLevel.INFO);
@@ -86,7 +89,7 @@ public class MultiReleaseJarHttpProperties extends MultiReleaseJarProperties {
         rootClass = cldr.loadClass("version.Main");
     }
 
-    @AfterClass
+    @AfterAll
     public void close() throws IOException {
         // Windows requires server to stop before file is deleted
         if (server != null) {
diff --git a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarProperties.java b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarProperties.java
index cbc9516542e..a742a593868 100644
--- a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarProperties.java
+++ b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,17 +29,17 @@
  * @build CreateMultiReleaseTestJars
  *        jdk.test.lib.compiler.Compiler
  *        jdk.test.lib.util.JarBuilder
- * @run testng MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=0   MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=8   MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=9   MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=100 MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarProperties
- * @run testng/othervm -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarProperties
+ * @run junit MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=0   MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=8   MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=9   MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=100 MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=8   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.version=9   -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.enableMultiRelease=false MultiReleaseJarProperties
+ * @run junit/othervm -Djdk.util.jar.enableMultiRelease=force MultiReleaseJarProperties
  */
 
 import java.io.File;
@@ -54,12 +54,15 @@ import java.nio.file.Files;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+
+import static org.junit.jupiter.api.Assertions.*;
 
 
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
 public class MultiReleaseJarProperties {
     final static int BASE_VERSION = JarFile.baseVersion().major();
 
@@ -70,7 +73,7 @@ public class MultiReleaseJarProperties {
     protected ClassLoader cldr;
     protected Class<?> rootClass;
 
-    @BeforeClass
+    @BeforeAll
     public void initialize() throws Exception {
         CreateMultiReleaseTestJars creator = new CreateMultiReleaseTestJars();
         creator.compileEntries();
@@ -97,7 +100,7 @@ public class MultiReleaseJarProperties {
         rootClass = cldr.loadClass("version.Main");
     }
 
-    @AfterClass
+    @AfterAll
     public void close() throws IOException {
         ((URLClassLoader) cldr).close();
         Files.delete(multirelease.toPath());
@@ -115,7 +118,7 @@ public class MultiReleaseJarProperties {
     protected void invokeMethod(Class<?> vcls, int expected) throws Throwable {
         MethodType mt = MethodType.methodType(int.class);
         MethodHandle mh = MethodHandles.lookup().findVirtual(vcls, "getVersion", mt);
-        Assert.assertEquals(expected, (int) mh.invoke(vcls.newInstance()));
+        assertEquals(expected, (int) mh.invoke(vcls.newInstance()));
     }
 
     /*
@@ -177,7 +180,7 @@ public class MultiReleaseJarProperties {
             resource = new String(bytes);
         }
         String match = "return " + rtVersion + ";";
-        Assert.assertTrue(resource.contains(match));
+        assertTrue(resource.contains(match));
     }
 
     @Test
@@ -194,6 +197,6 @@ public class MultiReleaseJarProperties {
             resource = new String(bytes);
         }
         String match = "return " + rtVersion + ";";
-        Assert.assertTrue(resource.contains(match));
+        assertTrue(resource.contains(match));
     }
 }
diff --git a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarSecurity.java b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarSecurity.java
index ec18cad0817..7e0bb2c1ca7 100644
--- a/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarSecurity.java
+++ b/test/jdk/java/util/jar/JarFile/mrjar/MultiReleaseJarSecurity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,7 +29,7 @@
  * @build CreateMultiReleaseTestJars
  *        jdk.test.lib.compiler.Compiler
  *        jdk.test.lib.util.JarBuilder
- * @run testng MultiReleaseJarSecurity
+ * @run junit MultiReleaseJarSecurity
  */
 
 import java.io.File;
@@ -38,45 +38,45 @@ import java.io.InputStream;
 import java.nio.file.Files;
 import java.security.CodeSigner;
 import java.security.cert.Certificate;
-import java.util.Arrays;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 import java.util.zip.ZipFile;
 
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Test;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
 
 public class MultiReleaseJarSecurity {
 
     static final int MAJOR_VERSION = Runtime.version().major();
 
-    String userdir = System.getProperty("user.dir",".");
-    File multirelease = new File(userdir, "multi-release.jar");
-    File signedmultirelease = new File(userdir, "signed-multi-release.jar");
+    static final String USER_DIR = System.getProperty("user.dir", ".");
+    static final File MULTI_RELEASE = new File(USER_DIR, "multi-release.jar");
+    static final File SIGNED_MULTI_RELEASE = new File(USER_DIR, "signed-multi-release.jar");
 
-    @BeforeClass
-    public void initialize() throws Exception {
+    @BeforeAll
+    public static void initialize() throws Exception {
         CreateMultiReleaseTestJars creator =  new CreateMultiReleaseTestJars();
         creator.compileEntries();
         creator.buildMultiReleaseJar();
         creator.buildSignedMultiReleaseJar();
     }
 
-    @AfterClass
-    public void close() throws IOException {
-        Files.delete(multirelease.toPath());
-        Files.delete(signedmultirelease.toPath());
+    @AfterAll
+    public static void close() throws IOException {
+        Files.delete(MULTI_RELEASE.toPath());
+        Files.delete(SIGNED_MULTI_RELEASE.toPath());
     }
 
     @Test
     public void testCertsAndSigners() throws IOException {
-        try (JarFile jf = new JarFile(signedmultirelease, true, ZipFile.OPEN_READ, Runtime.version())) {
+        try (JarFile jf = new JarFile(SIGNED_MULTI_RELEASE, true, ZipFile.OPEN_READ, Runtime.version())) {
             CertsAndSigners vcas = new CertsAndSigners(jf, jf.getJarEntry("version/Version.class"));
             CertsAndSigners rcas = new CertsAndSigners(jf, jf.getJarEntry("META-INF/versions/" + MAJOR_VERSION + "/version/Version.class"));
-            Assert.assertTrue(Arrays.equals(rcas.getCertificates(), vcas.getCertificates()));
-            Assert.assertTrue(Arrays.equals(rcas.getCodeSigners(), vcas.getCodeSigners()));
+            assertArrayEquals(rcas.getCertificates(), vcas.getCertificates());
+            assertArrayEquals(rcas.getCodeSigners(), vcas.getCodeSigners());
         }
     }
 
diff --git a/test/jdk/java/util/jar/JarFile/mrjar/TestVersionedStream.java b/test/jdk/java/util/jar/JarFile/mrjar/TestVersionedStream.java
index dbff39f814e..f88ab0821ae 100644
--- a/test/jdk/java/util/jar/JarFile/mrjar/TestVersionedStream.java
+++ b/test/jdk/java/util/jar/JarFile/mrjar/TestVersionedStream.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -28,7 +28,7 @@
  * @library /test/lib
  * @build jdk.test.lib.Platform
  *        jdk.test.lib.util.FileUtils
- * @run testng TestVersionedStream
+ * @run junit TestVersionedStream
  */
 
 import java.io.File;
@@ -41,7 +41,6 @@ import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
@@ -54,18 +53,20 @@ import java.util.stream.Stream;
 import java.util.zip.ZipFile;
 
 import jdk.test.lib.util.FileUtils;
-import org.testng.Assert;
-import org.testng.annotations.AfterClass;
-import org.testng.annotations.DataProvider;
-import org.testng.annotations.Test;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.*;
 
 public class TestVersionedStream {
-    private final Path userdir;
-    private final Set<String> unversionedEntryNames;
 
+    private static final Path userdir;
+    private static final Set<String> unversionedEntryNames;
     private static final int LATEST_VERSION = Runtime.version().feature();
 
-    public TestVersionedStream() throws IOException {
+    static {
         userdir = Paths.get(System.getProperty("user.dir", "."));
 
         // These are not real class files even though they end with .class.
@@ -91,8 +92,7 @@ public class TestVersionedStream {
             "--release " + LATEST_VERSION + " -C v" + LATEST_VERSION + " .");
 
         System.out.println("Contents of mmr.jar\n=======");
-
-        try(JarFile jf = new JarFile("mmr.jar")) {
+        try (JarFile jf = new JarFile("mmr.jar")) {
             unversionedEntryNames = jf.stream()
                     .map(je -> je.getName())
                     .peek(System.out::println)
@@ -100,13 +100,14 @@ public class TestVersionedStream {
                             ? nm.replaceFirst("META-INF/versions/\\d+/", "")
                             : nm)
                     .collect(Collectors.toCollection(LinkedHashSet::new));
+        } catch (IOException e) {
+            throw new RuntimeException("Failed to init \"unversionedEntryNames\"", e);
         }
-
         System.out.println("=======");
     }
 
-    @AfterClass
-    public void close() throws IOException {
+    @AfterAll
+    public static void close() throws IOException {
         Files.walk(userdir, 1)
                 .filter(p -> !p.equals(userdir))
                 .forEach(p -> {
@@ -122,53 +123,41 @@ public class TestVersionedStream {
                 });
     }
 
-    @DataProvider
-    public Object[][] data() {
-        return new Object[][] {
-            {Runtime.Version.parse("8")},
-            {Runtime.Version.parse("9")},
-            {Runtime.Version.parse("10")},
-            {Runtime.Version.parse(Integer.toString(LATEST_VERSION))},
-            {JarFile.baseVersion()},
-            {JarFile.runtimeVersion()}
-        };
+    public static Stream<Runtime.Version> arguments() {
+        return Stream.of(
+            Runtime.Version.parse("8"),
+            Runtime.Version.parse("9"),
+            Runtime.Version.parse("10"),
+            Runtime.Version.parse(Integer.toString(LATEST_VERSION)),
+            JarFile.baseVersion(),
+            JarFile.runtimeVersion()
+        );
     }
 
-    @Test(dataProvider="data")
-    public void test(Runtime.Version version) throws Exception {
+    @ParameterizedTest
+    @MethodSource("arguments")
+    public void versionTest(Runtime.Version version) throws Exception {
         try (JarFile jf = new JarFile(new File("mmr.jar"), false, ZipFile.OPEN_READ, version);
              Stream<JarEntry> jes = jf.versionedStream())
         {
-            Assert.assertNotNull(jes);
+            assertNotNull(jes);
 
             // put versioned entries in list so we can reuse them
             List<JarEntry> versionedEntries = jes.collect(Collectors.toList());
 
-            Assert.assertTrue(versionedEntries.size() > 0);
+            assertTrue(versionedEntries.size() > 0);
 
             // also keep the names
-            List<String> versionedNames = new ArrayList<>(versionedEntries.size());
+            List<String> versionedNames = versionedEntries.stream()
+                    .map(JarEntry::getName)
+                    .collect(Collectors.toList());
 
             // verify the correct order while building enames
-            Iterator<String> allIt = unversionedEntryNames.iterator();
-            Iterator<JarEntry> verIt = versionedEntries.iterator();
-            boolean match = false;
+            List<String> unversionedOrder = new ArrayList<>(unversionedEntryNames);
+            unversionedOrder.retainAll(versionedNames);
 
-            while (verIt.hasNext()) {
-                match = false;
-                if (!allIt.hasNext()) break;
-                String name = verIt.next().getName();
-                versionedNames.add(name);
-                while (allIt.hasNext()) {
-                    if (name.equals(allIt.next())) {
-                        match = true;
-                        break;
-                    }
-                }
-            }
-            if (!match) {
-                Assert.fail("versioned entries not in same order as unversioned entries");
-            }
+            assertIterableEquals(unversionedOrder, versionedNames,
+                    "versioned entries not in same order as unversioned entries");
 
             // verify the contents:
             // value.[0] end of the path
@@ -205,21 +194,21 @@ public class TestVersionedStream {
                         expected.put("q/Bar.class",
                                      new String[] { "q/Bar.class", "META-INF/versions/10/q/Bar.class"});
                     } else {
-                        Assert.fail("Test out of date, please add more cases");
+                        fail("Test out of date, please add more cases");
                     }
             }
 
             expected.entrySet().stream().forEach(e -> {
                 String name = e.getKey();
                 int i = versionedNames.indexOf(name);
-                Assert.assertTrue(i != -1, name + " not in enames");
+                assertTrue(i != -1, name + " not in enames");
                 JarEntry je = versionedEntries.get(i);
                 try (InputStream is = jf.getInputStream(je)) {
                     String s = new String(is.readAllBytes()).replaceAll(System.lineSeparator(), "");
                     // end of the path
-                    Assert.assertTrue(s.endsWith(e.getValue()[0]), s);
+                    assertTrue(s.endsWith(e.getValue()[0]), s);
                     // getRealName()
-                    Assert.assertTrue(je.getRealName().equals(e.getValue()[1]));
+                    assertTrue(je.getRealName().equals(e.getValue()[1]));
                 } catch (IOException x) {
                     throw new UncheckedIOException(x);
                 }
@@ -227,12 +216,12 @@ public class TestVersionedStream {
 
             if (!unversionedEntryNames.contains("META-INF/Foo.class") ||
                 versionedNames.indexOf("META-INF/Foo.class") != -1) {
-                Assert.fail("versioned META-INF/Foo.class test failed");
+                fail("versioned META-INF/Foo.class test failed");
             }
         }
     }
 
-    private void createFiles(String... files) {
+    private static void createFiles(String... files) {
         ArrayList<String> list = new ArrayList();
         Arrays.stream(files)
                 .map(f -> Paths.get(userdir.toAbsolutePath().toString(), f))
@@ -248,7 +237,7 @@ public class TestVersionedStream {
                     }});
     }
 
-    private void jar(String args) {
+    private static void jar(String args) {
         ToolProvider jar = ToolProvider.findFirst("jar").orElseThrow();
         jar.run(System.out, System.err, args.split(" +"));
     }
diff --git a/test/jdk/java/util/jar/JarInputStream/EmptyJar.java b/test/jdk/java/util/jar/JarInputStream/EmptyJar.java
index 9762455460c..ff961844685 100644
--- a/test/jdk/java/util/jar/JarInputStream/EmptyJar.java
+++ b/test/jdk/java/util/jar/JarInputStream/EmptyJar.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,18 +26,22 @@
    @summary Make sure JarInputStream constructor will not
             throw NullPointerException when the JAR file is
             empty.
-   */
+   @run junit EmptyJar
+ */
+
+import org.junit.jupiter.api.Test;
 
 import java.util.jar.*;
 import java.io.*;
 
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
 public class EmptyJar {
-    public static void main(String args[]) throws Exception {
-        try {
-            JarInputStream is = new JarInputStream
-                (new ByteArrayInputStream(new byte[0]));
-        } catch (NullPointerException e) {
-            throw new Exception("unexpected NullPointerException");
-        }
+
+    @Test
+    void npeTest() {
+        // Ensure no NPE is thrown
+        assertDoesNotThrow(() -> new JarInputStream(new ByteArrayInputStream(new byte[0])),
+                "unexpected NullPointerException");
     }
 }
diff --git a/test/jdk/java/util/jar/JarInputStream/ExtraFileInMetaInf.java b/test/jdk/java/util/jar/JarInputStream/ExtraFileInMetaInf.java
index 45865ec0b8f..fe88d225444 100644
--- a/test/jdk/java/util/jar/JarInputStream/ExtraFileInMetaInf.java
+++ b/test/jdk/java/util/jar/JarInputStream/ExtraFileInMetaInf.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,16 +27,24 @@
  * @summary JarInputStream doesn't provide certificates for some file under META-INF
  * @modules java.base/sun.security.tools.keytool
  *          jdk.jartool/sun.security.tools.jarsigner
+ * @run junit ExtraFileInMetaInf
  */
 
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
 import java.util.jar.*;
 import java.io.*;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
-public class ExtraFileInMetaInf {
-    public static void main(String args[]) throws Exception {
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.fail;
 
+public class ExtraFileInMetaInf {
+
+    @BeforeAll
+    static void setup() throws Exception {
         // Create a zip file with 2 entries
         try (ZipOutputStream zos =
                      new ZipOutputStream(new FileOutputStream("x.jar"))) {
@@ -44,7 +52,6 @@ public class ExtraFileInMetaInf {
             zos.write(new byte[10]);
             zos.putNextEntry(new ZipEntry("x"));
             zos.write(new byte[10]);
-            zos.close();
         }
 
         // Sign it
@@ -54,7 +61,10 @@ public class ExtraFileInMetaInf {
                         "-keyalg rsa -alias a -dname CN=A -genkeypair").split(" "));
         sun.security.tools.jarsigner.Main.main(
                 "-keystore ks -storepass changeit x.jar a".split(" "));
+    }
 
+    @Test
+    void checkSignedTest() throws IOException {
         // Check if the entries are signed
         try (JarInputStream jis =
                      new JarInputStream(new FileInputStream("x.jar"))) {
@@ -63,9 +73,7 @@ public class ExtraFileInMetaInf {
                 String name = je.toString();
                 if (name.equals("META-INF/SUB/file") || name.equals("x")) {
                     while (jis.read(new byte[1000]) >= 0);
-                    if (je.getCertificates() == null) {
-                        throw new Exception(name + " not signed");
-                    }
+                    assertNotNull(je.getCertificates(), name + " not signed");
                 }
             }
         }
diff --git a/test/jdk/java/util/jar/JarInputStream/ScanSignedJar.java b/test/jdk/java/util/jar/JarInputStream/ScanSignedJar.java
index 86dbf793e74..23e0a81c4cf 100644
--- a/test/jdk/java/util/jar/JarInputStream/ScanSignedJar.java
+++ b/test/jdk/java/util/jar/JarInputStream/ScanSignedJar.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,13 +25,19 @@
  * @test
  * @bug 6284489
  * @summary Confirm that JarEntry.getCertificates identifies signed entries.
+ * @run junit ScanSignedJar
  */
 
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
 import java.net.URL;
 import java.security.CodeSigner;
 import java.security.cert.Certificate;
 import java.util.jar.*;
 
+import static org.junit.jupiter.api.Assertions.fail;
+
 /*
  * Confirm that the signed entries in a JAR file are identified correctly
  * when JarEntry.getCertificates is used to extract the signer's certificates.
@@ -43,13 +49,13 @@ import java.util.jar.*;
 public class ScanSignedJar {
 
     private static final String JAR_LOCATION =
-        "file:" +
-        System.getProperty("test.src", ".") +
-        System.getProperty("file.separator") +
-        "signed.jar";
-
-    public static void main(String[] args) throws Exception {
+            "file:" +
+                    System.getProperty("test.src", ".") +
+                    System.getProperty("file.separator") +
+                    "signed.jar";
 
+    @Test
+    void signedJarTest() throws IOException {
         System.out.println("Opening " + JAR_LOCATION + "...");
         JarInputStream inStream =
             new JarInputStream(new URL(JAR_LOCATION).openStream(), true);
@@ -71,7 +77,7 @@ public class ScanSignedJar {
                 System.out.println("[unsigned]\t" + name + "\t(" + size +
                     " bytes)");
                 if (name.equals("Count.class")) {
-                    throw new Exception("Count.class should be signed");
+                    fail("Count.class should be signed");
                 }
             } else if (signers != null && certificates != null) {
                 System.out.println("[" + signers.length +
@@ -80,7 +86,7 @@ public class ScanSignedJar {
             } else {
                 System.out.println("[*ERROR*]\t" + name + "\t(" + size +
                     " bytes)");
-                throw new Exception("Cannot determine whether the entry is " +
+                fail("Cannot determine whether the entry is " +
                     "signed or unsigned (signers[] doesn't match certs[]).");
             }
         }
diff --git a/test/jdk/java/util/jar/JarInputStream/TestIndexedJarWithBadSignature.java b/test/jdk/java/util/jar/JarInputStream/TestIndexedJarWithBadSignature.java
index 2e74eb10069..47dc572aa6b 100644
--- a/test/jdk/java/util/jar/JarInputStream/TestIndexedJarWithBadSignature.java
+++ b/test/jdk/java/util/jar/JarInputStream/TestIndexedJarWithBadSignature.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,32 +26,32 @@
  * @bug 6544278
  * @summary Confirm the JarInputStream throws the SecurityException when
  *          verifying an indexed jar file with corrupted signature
+ * @run junit TestIndexedJarWithBadSignature
  */
 
+import org.junit.jupiter.api.Test;
+
 import java.io.IOException;
 import java.io.FileInputStream;
 import java.util.jar.JarEntry;
 import java.util.jar.JarInputStream;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 public class TestIndexedJarWithBadSignature {
 
-    public static void main(String...args) throws Throwable {
+    @Test
+    void securityExceptionTest() throws IOException {
         try (JarInputStream jis = new JarInputStream(
-                 new FileInputStream(System.getProperty("test.src", ".") +
-                                     System.getProperty("file.separator") +
-                                     "BadSignedJar.jar")))
-        {
-            JarEntry je1 = jis.getNextJarEntry();
-            while(je1!=null){
-                System.out.println("Jar Entry1==>"+je1.getName());
-                je1 = jis.getNextJarEntry(); // This should throw Security Exception
-            }
-            throw new RuntimeException(
-                "Test Failed:Security Exception not being thrown");
-        } catch (IOException ie){
-            ie.printStackTrace();
-        } catch (SecurityException e) {
-            System.out.println("Test passed: Security Exception thrown as expected");
+                new FileInputStream(System.getProperty("test.src", ".") +
+                        System.getProperty("file.separator") +
+                        "BadSignedJar.jar"))) {
+            assertThrows(SecurityException.class, () -> {
+                JarEntry je1;
+                while ((je1 = jis.getNextJarEntry()) != null) {
+                    System.out.println("Jar Entry1==>" + je1.getName());
+                }
+            });
         }
     }
 }
diff --git a/test/jdk/java/util/jar/Manifest/CreateManifest.java b/test/jdk/java/util/jar/Manifest/CreateManifest.java
index 6655089b56d..2eee24fb0be 100644
--- a/test/jdk/java/util/jar/Manifest/CreateManifest.java
+++ b/test/jdk/java/util/jar/Manifest/CreateManifest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,40 +27,43 @@
  * @summary Jar tools fails to generate manifest correctly when boundary condition hit
  * @modules jdk.jartool/sun.tools.jar
  * @compile -XDignore.symbol.file=true CreateManifest.java
- * @run main CreateManifest
+ * @run junit CreateManifest
  */
 
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.jar.*;
 
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
 public class CreateManifest {
 
-public static void main(String arg[]) throws Exception {
+    @Test
+    void boundaryTest() throws IOException {
+        String jarFileName = "test.jar";
+        String ManifestName = "MANIFEST.MF";
 
-    String jarFileName = "test.jar";
-    String ManifestName = "MANIFEST.MF";
+        // create the MANIFEST.MF file
+        Files.write(Paths.get(ManifestName), FILE_CONTENTS.getBytes());
 
-    // create the MANIFEST.MF file
-    Files.write(Paths.get(ManifestName), FILE_CONTENTS.getBytes());
+        String [] args = new String [] { "cvfm", jarFileName, ManifestName};
+        sun.tools.jar.Main jartool =
+                new sun.tools.jar.Main(System.out, System.err, "jar");
+        jartool.run(args);
 
-    String [] args = new String [] { "cvfm", jarFileName, ManifestName};
-    sun.tools.jar.Main jartool =
-            new sun.tools.jar.Main(System.out, System.err, "jar");
-    jartool.run(args);
-
-    try (JarFile jf = new JarFile(jarFileName)) {
-        Manifest m = jf.getManifest();
-        String result = m.getMainAttributes().getValue("Class-path");
-        if (result == null)
-            throw new RuntimeException("Failed to add Class-path attribute to manifest");
-    } finally {
-        Files.deleteIfExists(Paths.get(jarFileName));
-        Files.deleteIfExists(Paths.get(ManifestName));
+        try (JarFile jf = new JarFile(jarFileName)) {
+            Manifest m = jf.getManifest();
+            String result = m.getMainAttributes().getValue("Class-path");
+            assertNotNull(result, "Failed to add Class-path attribute to manifest");
+        } finally {
+            Files.deleteIfExists(Paths.get(jarFileName));
+            Files.deleteIfExists(Paths.get(ManifestName));
+        }
     }
 
-}
-
 private static final String FILE_CONTENTS =
  "Class-path: \n" +
  " /ade/dtsao_re/oracle/emcore//lib/em-core-testconsole-uimodel.jar \n" +
diff --git a/test/jdk/java/util/jar/Manifest/IncludeInExceptionsTest.java b/test/jdk/java/util/jar/Manifest/IncludeInExceptionsTest.java
index 1e272015087..bb3cd6e23ef 100644
--- a/test/jdk/java/util/jar/Manifest/IncludeInExceptionsTest.java
+++ b/test/jdk/java/util/jar/Manifest/IncludeInExceptionsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,7 +21,9 @@
  * questions.
  */
 
-import java.io.File;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
 import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.file.Files;
@@ -30,23 +32,29 @@ import java.util.concurrent.Callable;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 import java.util.jar.JarOutputStream;
+import java.util.stream.Stream;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.fail;
 
-/**
+/*
  * @test
  * @bug 8216362
- * @run main/othervm -Djdk.includeInExceptions=jar IncludeInExceptionsTest yes
- * @run main/othervm IncludeInExceptionsTest
- * @summary Verify that the property jdk.net.includeInExceptions works as expected
+ * @run junit/othervm -Djdk.includeInExceptions=jar IncludeInExceptionsTest
+ * @run junit/othervm IncludeInExceptionsTest
+ * @summary Verify that the property jdk.includeInExceptions works as expected
  * when an error occurs while reading an invalid Manifest file.
  */
+
 /*
  * @see Manifest#Manifest(JarVerifier,InputStream,String)
  * @see Manifest#getErrorPosition
  */
 public class IncludeInExceptionsTest {
 
+    private static final boolean includeInExceptions = System.getProperty("jdk.includeInExceptions") != null;
+
     static final String FILENAME = "Unique-Filename-Expected-In_Msg.jar";
 
     static final byte[] INVALID_MANIFEST = (
@@ -66,36 +74,26 @@ public class IncludeInExceptionsTest {
         return jar;
     }
 
-    static void test(Callable<?> attempt, boolean includeInExceptions) throws Exception {
-        try {
-            attempt.call();
-            throw new AssertionError("Excpected Exception not thrown");
-        } catch (IOException e) {
-            boolean foundFileName = e.getMessage().contains(FILENAME);
-            if(includeInExceptions && !foundFileName) {
-                throw new AssertionError("JAR file name expected but not found in error message");
-            } else if (foundFileName && !includeInExceptions) {
-                throw new AssertionError("JAR file name found but should not be in error message");
-            }
+    @ParameterizedTest
+    @MethodSource("manifests")
+    void testInvalidManifest(Callable<?> attempt) {
+        var ioException = assertThrows(IOException.class, attempt::call);
+        boolean foundFileName = ioException.getMessage().contains(FILENAME);
+        if (includeInExceptions && !foundFileName) {
+            fail("JAR file name expected but not found in error message");
+        } else if (foundFileName && !includeInExceptions) {
+            fail("JAR file name found but should not be in error message");
         }
     }
 
-    public static void main(String[] args) throws Exception {
-
-        boolean includeInExceptions;
-        if(args.length > 0) {
-            includeInExceptions = true;
-            System.out.println("**** Running test WITH -Djdk.includeInExceptions=jar");
-        } else {
-            includeInExceptions = false;
-            System.out.println("**** Running test WITHOUT -Djdk.includeInExceptions=jar");
-        }
-
-        test(() -> new JarFile(createJarInvalidManifest(FILENAME)).getManifest(),
-                includeInExceptions);
-        test(() -> new JarFile(createJarInvalidManifest("Verifying-" + FILENAME),
-                true).getManifest(), includeInExceptions);
+    static Stream<Callable<?>> manifests() {
+        Callable<?> jarName = () -> new JarFile(createJarInvalidManifest(FILENAME)).getManifest();
+        Callable<?> jarNameVerify = () -> new JarFile(createJarInvalidManifest("Verifying-" + FILENAME),
+                true).getManifest();
+        return Stream.of(
+                jarName,
+                jarNameVerify
+        );
     }
-
 }
 
diff --git a/test/jdk/java/util/jar/Manifest/LineBreakLineWidth.java b/test/jdk/java/util/jar/Manifest/LineBreakLineWidth.java
index 8009db75601..f33bd7a276f 100644
--- a/test/jdk/java/util/jar/Manifest/LineBreakLineWidth.java
+++ b/test/jdk/java/util/jar/Manifest/LineBreakLineWidth.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,23 +21,22 @@
  * questions.
  */
 
-import static java.nio.charset.StandardCharsets.UTF_8;
-
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.io.OutputStream;
 import java.util.jar.Manifest;
 import java.util.jar.Attributes;
 import java.util.jar.Attributes.Name;
 
-import org.testng.annotations.Test;
-import static org.testng.Assert.*;
+import org.junit.jupiter.api.Test;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.jupiter.api.Assertions.*;
 
 /**
  * @test
  * @bug 6372077
- * @run testng LineBreakLineWidth
+ * @run junit LineBreakLineWidth
  * @summary write valid manifests with respect to line breaks
  *          and read any line width
  */
@@ -99,16 +98,10 @@ public class LineBreakLineWidth {
         assertMainAndSectionValues(mf, name, value);
     }
 
-    static void writeInvalidManifestThrowsException(String name, String value)
-            throws IOException {
-        try {
-            writeManifest(name, value);
-        } catch (IllegalArgumentException e) {
-            // no invalid manifest was produced which is considered acceptable
-            return;
-        }
-
-        fail("no error writing manifest considered invalid");
+    static void writeInvalidManifestThrowsException(String name, String value) {
+        // no invalid manifest was produced which is considered acceptable
+        assertThrows(IllegalArgumentException.class,
+                () -> writeManifest(name, value), "no error writing manifest considered invalid");
     }
 
     /**
@@ -278,8 +271,8 @@ public class LineBreakLineWidth {
         String mainValue = mf.getMainAttributes().getValue(name);
         String sectionValue = mf.getAttributes(name).getValue(name);
 
-        assertEquals(value, mainValue, "value different in main section");
-        assertEquals(value, sectionValue, "value different in named section");
+        assertEquals(mainValue, value, "value different in main section");
+        assertEquals(sectionValue, value, "value different in named section");
     }
 
 }
diff --git a/test/jdk/java/util/jar/Manifest/ValueUtf8Coding.java b/test/jdk/java/util/jar/Manifest/ValueUtf8Coding.java
index 28921bba868..cad0048f098 100644
--- a/test/jdk/java/util/jar/Manifest/ValueUtf8Coding.java
+++ b/test/jdk/java/util/jar/Manifest/ValueUtf8Coding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,8 +21,6 @@
  * questions.
  */
 
-import static java.nio.charset.StandardCharsets.UTF_8;
-
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -32,13 +30,15 @@ import java.util.jar.Manifest;
 import java.util.List;
 import java.util.ArrayList;
 
-import org.testng.annotations.Test;
-import static org.testng.Assert.*;
+import org.junit.jupiter.api.Test;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.jupiter.api.Assertions.*;
 
 /**
  * @test
  * @bug 8066619 8351567
- * @run testng ValueUtf8Coding
+ * @run junit ValueUtf8Coding
  * @summary Tests encoding and decoding manifest header values to and from
  * UTF-8 with the complete Unicode character set.
  */ /*
@@ -187,11 +187,11 @@ public class ValueUtf8Coding {
             String value = values.get(i);
             Name name = azName(i);
 
-            assertEquals(mf.getMainAttributes().getValue(name), value,
+            assertEquals(value, mf.getMainAttributes().getValue(name),
                     "main attributes header value");
             Attributes attributes = mf.getAttributes(value);
             assertNotNull(attributes, "named section");
-            assertEquals(attributes.getValue(name), value,
+            assertEquals(value, attributes.getValue(name),
                     "named section attributes value");
         }
     }
diff --git a/test/jdk/java/util/jar/Manifest/WriteBinaryStructure.java b/test/jdk/java/util/jar/Manifest/WriteBinaryStructure.java
index 379de6b1adb..f91b518aa6c 100644
--- a/test/jdk/java/util/jar/Manifest/WriteBinaryStructure.java
+++ b/test/jdk/java/util/jar/Manifest/WriteBinaryStructure.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,22 +21,22 @@
  * questions.
  */
 
-import static java.nio.charset.StandardCharsets.UTF_8;
-
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.util.jar.Attributes;
 import java.util.jar.Attributes.Name;
 import java.util.jar.Manifest;
 
-import org.testng.annotations.Test;
-import static org.testng.Assert.*;
+import org.junit.jupiter.api.Test;
 
-/**
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.jupiter.api.Assertions.*;
+
+/*
  * @test
  * @bug 8066619
- * @run testng WriteBinaryStructure
  * @summary Tests that jar manifests are written in a particular structure
+ * @run junit WriteBinaryStructure
  */
 public class WriteBinaryStructure {
 
@@ -47,10 +47,11 @@ public class WriteBinaryStructure {
         mf.getMainAttributes().put(new Name("Key"), "Value");
         ByteArrayOutputStream buf = new ByteArrayOutputStream();
         mf.write(buf);
-        assertEquals(buf.toByteArray(), (
+        assertArrayEquals((
                 "Manifest-Version: 1.0\r\n" +
                 "Key: Value\r\n" +
-                "\r\n").getBytes(UTF_8));
+                "\r\n").getBytes(UTF_8),
+                buf.toByteArray());
     }
 
     @Test
@@ -62,12 +63,12 @@ public class WriteBinaryStructure {
         attributes.put(new Name("Key"), "Value");
         ByteArrayOutputStream buf = new ByteArrayOutputStream();
         mf.write(buf);
-        assertEquals(buf.toByteArray(), (
+        assertArrayEquals((
                 "Manifest-Version: 1.0\r\n" +
                 "\r\n" +
                 "Name: Individual-Section-Name\r\n" +
                 "Key: Value\r\n" +
-                "\r\n").getBytes(UTF_8));
+                "\r\n").getBytes(UTF_8),
+                buf.toByteArray());
     }
-
 }
diff --git a/test/jdk/java/util/jar/TestExtra.java b/test/jdk/java/util/jar/TestExtra.java
index fa6408ba570..776b5e67d14 100644
--- a/test/jdk/java/util/jar/TestExtra.java
+++ b/test/jdk/java/util/jar/TestExtra.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -21,180 +21,84 @@
  * questions.
  */
 
-/**
+/*
  * @test
  * @bug 6480504 6303183
  * @summary Test that client-provided data in the extra field is written and
  * read correctly, taking into account the JAR_MAGIC written into the extra
- * field of the first entry of JAR files.
- * @author Dave Bristor
+ * field of the first entry of JAR files. ZIP file specific.
+ * @run junit TestExtra
  */
 
+import org.junit.jupiter.api.Test;
+
 import java.io.*;
 import java.nio.charset.Charset;
-import java.util.Arrays;
+import java.nio.charset.StandardCharsets;
 import java.util.jar.*;
 import java.util.zip.*;
 
-/**
- * Tests that the get/set operations on extra data in zip and jar files work
- * as advertised.  The base class tests ZIP files, the member class
- * TestJarExtra checks JAR files.
- */
-public class TestExtra {
-    static final int JAR_MAGIC = 0xcafe; // private IN JarOutputStream.java
-    static final int TEST_HEADER = 0xbabe;
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 
-    static final Charset ascii = Charset.forName("ASCII");
+// Tests that the get/set operations on extra data in ZIP files work as advertised.
+public class TestExtra {
+
+    static final int TEST_HEADER = 0xbabe;
+    static final Charset ascii = StandardCharsets.US_ASCII;
 
     // ZipEntry extra data
     static final byte[][] extra = new byte[][] {
-        ascii.encode("hello, world").array(),
-        ascii.encode("foo bar").array()
+            ascii.encode("hello, world").array(),
+            ascii.encode("foo bar").array()
     };
 
-    // For naming entries in JAR/ZIP streams
-    int count = 1;
+    // For naming entries in ZIP streams
+    static int count = 1;
 
     // Use byte arrays instead of files
-    ByteArrayOutputStream baos;
+    ByteArrayOutputStream baos  = new ByteArrayOutputStream();
 
-    // JAR/ZIP content written here.
-    ZipOutputStream zos;
+    // ZIP content written here.
+    ZipOutputStream zos = assertDoesNotThrow(() -> getOutputStream(baos));
 
-    public static void realMain(String[] args) throws Throwable{
-        new TestExtra().testHeaderPlusData();
-
-        new TestJarExtra().testHeaderPlusData();
-        new TestJarExtra().testHeaderOnly();
-        new TestJarExtra().testClientJarMagic();
-    }
-
-    TestExtra() {
-        try {
-            baos = new ByteArrayOutputStream();
-            zos = getOutputStream(baos);
-        } catch (Throwable t) {
-            unexpected(t);
-        }
-    }
-
-    /** Test that a header + data set by client works. */
+    // Test that a header + data set by client works.
+    @Test
     void testHeaderPlusData() throws IOException {
         for (byte[] b : extra) {
             ZipEntry ze = getEntry();
             byte[] data = new byte[b.length + 4];
             set16(data, 0, TEST_HEADER);
             set16(data, 2, b.length);
-            for (int i = 0; i < b.length; i++) {
-                data[i + 4] = b[i];
-            }
+            System.arraycopy(b, 0, data, 4, b.length);
             ze.setExtra(data);
             zos.putNextEntry(ze);
         }
         zos.close();
-
         ZipInputStream zis = getInputStream();
-
         ZipEntry ze = zis.getNextEntry();
         checkEntry(ze, 0, extra[0].length);
-
         ze = zis.getNextEntry();
         checkEntry(ze, 1, extra[1].length);
     }
 
-    /** Test that a header only (i.e., no extra "data") set by client works. */
-    void testHeaderOnly() throws IOException {
-        ZipEntry ze = getEntry();
-        byte[] data = new byte[4];
-        set16(data, 0, TEST_HEADER);
-        set16(data, 2, 0); // Length of data is 0.
-        ze.setExtra(data);
-        zos.putNextEntry(ze);
-
-        zos.close();
-
-        ZipInputStream zis = getInputStream();
-
-        ze = zis.getNextEntry();
-        checkExtra(data, ze.getExtra());
-        checkEntry(ze, 0, 0);
-    }
-
-    /** Tests the client providing extra data which uses JAR_MAGIC header. */
-    void testClientJarMagic() throws IOException {
-        ZipEntry ze = getEntry();
-        byte[] data = new byte[8];
-
-        set16(data, 0, TEST_HEADER);
-        set16(data, 2, 0); // Length of data is 0.
-        set16(data, 4, JAR_MAGIC);
-        set16(data, 6, 0); // Length of data is 0.
-
-        ze.setExtra(data);
-        zos.putNextEntry(ze);
-
-        zos.close();
-
-        ZipInputStream zis = getInputStream();
-        ze = zis.getNextEntry();
-        byte[] e = ze.getExtra();
-        checkExtra(data, ze.getExtra());
-        checkEntry(ze, 0, 0);
-    }
-
-    // check if all "expected" extra fields equal to their
-    // corresponding fields in "extra". The "extra" might have
-    // timestamp fields added by ZOS.
-    static void checkExtra(byte[] expected, byte[] extra) {
-        if (expected == null)
-            return;
-        int off = 0;
-        int len = expected.length;
-        while (off + 4 < len) {
-            int tag = get16(expected, off);
-            int sz = get16(expected, off + 2);
-            int off0 = 0;
-            int len0 = extra.length;
-            boolean matched = false;
-            while (off0 + 4 < len0) {
-                int tag0 = get16(extra, off0);
-                int sz0 = get16(extra, off0 + 2);
-                if (tag == tag0 && sz == sz0) {
-                    matched = true;
-                    for (int i = 0; i < sz; i++) {
-                        if (expected[off + i] != extra[off0 +i])
-                            matched = false;
-                    }
-                    break;
-                }
-                off0 += (4 + sz0);
-            }
-            if (!matched) {
-                fail("Expected extra data [tag=" + tag + "sz=" + sz + "] check failed");
-            }
-            off += (4 + sz);
-        }
-    }
-
-    /** Check that the entry's extra data is correct. */
+    // Check that the entry's extra data is correct.
     void checkEntry(ZipEntry ze, int count, int dataLength) {
         byte[] extraData = ze.getExtra();
         byte[] data = getField(TEST_HEADER, extraData);
-        if (!check(data != null, "unexpected null data for TEST_HEADER")) {
-            return;
-        }
-
+        assertNotNull(data, "unexpected null data for TEST_HEADER");
         if (dataLength == 0) {
-            check(data.length == 0, "unexpected non-zero data length for TEST_HEADER");
+            assertEquals(0, data.length, "unexpected non-zero data length for TEST_HEADER");
         } else {
-            check(Arrays.equals(extra[count], data),
-                  "failed to get entry " + ze.getName()
-                  + ", expected " + new String(extra[count]) + ", got '" + new String(data) + "'");
+            assertArrayEquals(data, extra[count],
+                    "failed to get entry " + ze.getName()
+                            + ", expected " + new String(extra[count]) + ", got '" + new String(data) + "'");
         }
     }
 
-    /** Look up descriptor in data, returning corresponding byte[]. */
+    // Look up descriptor in data, returning corresponding byte[].
     static byte[] getField(int descriptor, byte[] data) {
         byte[] rc = null;
         try {
@@ -218,69 +122,23 @@ public class TestExtra {
 
     ZipInputStream getInputStream() {
         return new ZipInputStream(
-            new ByteArrayInputStream(baos.toByteArray()));
+                new ByteArrayInputStream(baos.toByteArray()));
     }
 
-    ZipOutputStream getOutputStream(ByteArrayOutputStream baos) throws IOException {
+    ZipOutputStream getOutputStream(ByteArrayOutputStream baos) {
         return new ZipOutputStream(baos);
     }
 
-    ZipInputStream getInputStream(ByteArrayInputStream bais) throws IOException {
-        return new ZipInputStream(bais);
+    ZipEntry getEntry() {
+        return new ZipEntry("zip" + count++ + ".txt");
     }
 
-    ZipEntry getEntry() { return new ZipEntry("zip" + count++ + ".txt"); }
-
-
-    private static int get16(byte[] b, int off) {
-        return (b[off] & 0xff) | ((b[off+1] & 0xff) << 8);
+    static int get16(byte[] b, int off) {
+        return (b[off] & 0xff) | ((b[off + 1] & 0xff) << 8);
     }
 
-    private static void set16(byte[] b, int off, int value) {
-        b[off+0] = (byte)value;
-        b[off+1] = (byte)(value >> 8);
+    static void set16(byte[] b, int off, int value) {
+        b[off + 0] = (byte) value;
+        b[off + 1] = (byte) (value >> 8);
     }
-
-    /** Test extra field of a JAR file. */
-    static class TestJarExtra extends TestExtra {
-        ZipOutputStream getOutputStream(ByteArrayOutputStream baos) throws IOException {
-            return new JarOutputStream(baos);
-        }
-
-        ZipInputStream getInputStream(ByteArrayInputStream bais) throws IOException {
-            return new JarInputStream(bais);
-        }
-
-        ZipEntry getEntry() { return new ZipEntry("jar" + count++ + ".txt"); }
-
-        void checkEntry(ZipEntry ze, int count, int dataLength) {
-            // zeroth entry should have JAR_MAGIC
-            if (count == 0) {
-                byte[] extraData = ze.getExtra();
-                byte[] data = getField(JAR_MAGIC, extraData);
-                if (!check(data != null, "unexpected null data for JAR_MAGIC")) {
-                    check(data.length != 0, "unexpected non-zero data length for JAR_MAGIC");
-                }
-            }
-            // In a jar file, the first ZipEntry should have both JAR_MAGIC
-            // and the TEST_HEADER, so check that also.
-            super.checkEntry(ze, count, dataLength);
-        }
-    }
-
-    //--------------------- Infrastructure ---------------------------
-    static volatile int passed = 0, failed = 0;
-    static void pass() {passed++;}
-    static void fail() {failed++; Thread.dumpStack();}
-    static void fail(String msg) {System.out.println(msg); fail();}
-    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
-    static void check(boolean cond) {if (cond) pass(); else fail();}
-    static boolean check(boolean cond, String msg) {if (cond) pass(); else fail(msg); return cond; }
-    static void equal(Object x, Object y) {
-        if (x == null ? y == null : x.equals(y)) pass();
-        else fail(x + " not equal to " + y);}
-    public static void main(String[] args) throws Throwable {
-        try {realMain(args);} catch (Throwable t) {unexpected(t);}
-        System.out.println("\nPassed = " + passed + " failed = " + failed);
-        if (failed > 0) throw new Error("Some tests failed");}
 }
diff --git a/test/jdk/java/util/jar/TestJarExtra.java b/test/jdk/java/util/jar/TestJarExtra.java
new file mode 100644
index 00000000000..6619727bfe8
--- /dev/null
+++ b/test/jdk/java/util/jar/TestJarExtra.java
@@ -0,0 +1,224 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 6480504 6303183
+ * @summary Test that client-provided data in the extra field is written and
+ * read correctly, taking into account the JAR_MAGIC written into the extra
+ * field of the first entry of JAR files. Jar file specific.
+ * @run junit TestJarExtra
+ */
+
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.util.jar.JarOutputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.fail;
+
+// Tests that the get/set operations on extra data in JAR files work as advertised.
+public class TestJarExtra {
+
+    static final int JAR_MAGIC = 0xcafe; // private IN JarOutputStream.java
+    static final int TEST_HEADER = 0xbabe;
+    // For naming entries in JAR streams
+    static int count = 1;
+    static final Charset ascii = StandardCharsets.US_ASCII;
+    // ZipEntry extra data
+    static final byte[][] extra = new byte[][] {
+            ascii.encode("hello, world").array(),
+            ascii.encode("foo bar").array()
+    };
+
+    // Use byte arrays instead of files
+    ByteArrayOutputStream baos  = new ByteArrayOutputStream();
+
+    // JAR content written here.
+    JarOutputStream jos = assertDoesNotThrow(() -> getOutputStream(baos));
+
+    // Test that a header + data set by client works.
+    @Test
+    void testHeaderPlusData() throws IOException {
+        for (byte[] b : extra) {
+            ZipEntry ze = getEntry();
+            byte[] data = new byte[b.length + 4];
+            set16(data, 0, TEST_HEADER);
+            set16(data, 2, b.length);
+            System.arraycopy(b, 0, data, 4, b.length);
+            ze.setExtra(data);
+            jos.putNextEntry(ze);
+        }
+        jos.close();
+        ZipInputStream zis = getInputStream();
+        ZipEntry ze = zis.getNextEntry();
+        checkEntry(ze, 0, extra[0].length);
+        ze = zis.getNextEntry();
+        checkEntry(ze, 1, extra[1].length);
+    }
+
+    // Test that a header only (i.e., no extra "data") set by client works.
+    @Test
+    void testHeaderOnly() throws IOException {
+        ZipEntry ze = getEntry();
+        byte[] data = new byte[4];
+        set16(data, 0, TEST_HEADER);
+        set16(data, 2, 0); // Length of data is 0.
+        ze.setExtra(data);
+        jos.putNextEntry(ze);
+        jos.close();
+        ZipInputStream zis = getInputStream();
+        ze = zis.getNextEntry();
+        checkExtra(data, ze.getExtra());
+        checkEntry(ze, 0, 0);
+    }
+
+    // Tests the client providing extra data which uses JAR_MAGIC header.
+    @Test
+    void testClientJarMagic() throws IOException {
+        ZipEntry ze = getEntry();
+        byte[] data = new byte[8];
+        set16(data, 0, TEST_HEADER);
+        set16(data, 2, 0); // Length of data is 0.
+        set16(data, 4, JAR_MAGIC);
+        set16(data, 6, 0); // Length of data is 0.
+        ze.setExtra(data);
+        jos.putNextEntry(ze);
+        jos.close();
+        ZipInputStream zis = getInputStream();
+        ze = zis.getNextEntry();
+        byte[] e = ze.getExtra();
+        checkExtra(data, ze.getExtra());
+        checkEntry(ze, 0, 0);
+    }
+
+    JarOutputStream getOutputStream(ByteArrayOutputStream baos) throws IOException {
+        return new JarOutputStream(baos);
+    }
+
+    ZipInputStream getInputStream() {
+        return new ZipInputStream(
+                new ByteArrayInputStream(baos.toByteArray()));
+    }
+
+    ZipEntry getEntry() {
+        return new ZipEntry("jar" + count++ + ".txt");
+    }
+
+    // check if all "expected" extra fields equal to their
+    // corresponding fields in "extra". The "extra" might have
+    // timestamp fields added by ZOS.
+    static void checkExtra(byte[] expected, byte[] extra) {
+        if (expected == null)
+            return;
+        int off = 0;
+        int len = expected.length;
+        while (off + 4 < len) {
+            int tag = get16(expected, off);
+            int sz = get16(expected, off + 2);
+            int off0 = 0;
+            int len0 = extra.length;
+            boolean matched = false;
+            while (off0 + 4 < len0) {
+                int tag0 = get16(extra, off0);
+                int sz0 = get16(extra, off0 + 2);
+                if (tag == tag0 && sz == sz0) {
+                    matched = true;
+                    for (int i = 0; i < sz; i++) {
+                        if (expected[off + i] != extra[off0 + i])
+                            matched = false;
+                    }
+                    break;
+                }
+                off0 += (4 + sz0);
+            }
+            if (!matched) {
+                fail("Expected extra data [tag=" + tag + "sz=" + sz + "] check failed");
+            }
+            off += (4 + sz);
+        }
+    }
+
+    void checkEntry(ZipEntry ze, int count, int dataLength) {
+        // zeroth entry should have JAR_MAGIC
+        if (count == 0) {
+            byte[] extraData = ze.getExtra();
+            byte[] data = getField(JAR_MAGIC, extraData);
+            assertNotNull(data, "unexpected null data for JAR_MAGIC");
+            assertEquals(0, data.length, "unexpected non-zero data length for JAR_MAGIC");
+        }
+        // In a JAR file, the first ZipEntry should have both JAR_MAGIC
+        // and the TEST_HEADER, so check that also.
+        byte[] extraData = ze.getExtra();
+        byte[] data = getField(TEST_HEADER, extraData);
+        assertNotNull(data, "unexpected null data for TEST_HEADER");
+        if (dataLength == 0) {
+            assertEquals(0, data.length, "unexpected non-zero data length for TEST_HEADER");
+        } else {
+            assertArrayEquals(data, extra[count],
+                    "failed to get entry " + ze.getName()
+                            + ", expected " + new String(extra[count]) + ", got '" + new String(data) + "'");
+        }
+    }
+
+    // Look up descriptor in data, returning corresponding byte[].
+    static byte[] getField(int descriptor, byte[] data) {
+        byte[] rc = null;
+        try {
+            int i = 0;
+            while (i < data.length) {
+                if (get16(data, i) == descriptor) {
+                    int length = get16(data, i + 2);
+                    rc = new byte[length];
+                    for (int j = 0; j < length; j++) {
+                        rc[j] = data[i + 4 + j];
+                    }
+                    return rc;
+                }
+                i += get16(data, i + 2) + 4;
+            }
+        } catch (ArrayIndexOutOfBoundsException e) {
+            // descriptor not found
+        }
+        return rc;
+    }
+
+    static int get16(byte[] b, int off) {
+        return (b[off] & 0xff) | ((b[off + 1] & 0xff) << 8);
+    }
+
+    static void set16(byte[] b, int off, int value) {
+        b[off + 0] = (byte) value;
+        b[off + 1] = (byte) (value >> 8);
+    }
+}
diff --git a/test/jdk/java/util/zip/ZipFile/EndOfCenValidation.java b/test/jdk/java/util/zip/ZipFile/EndOfCenValidation.java
index 7adcfb9c128..7ca71c9890a 100644
--- a/test/jdk/java/util/zip/ZipFile/EndOfCenValidation.java
+++ b/test/jdk/java/util/zip/ZipFile/EndOfCenValidation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,33 +25,26 @@
  * @bug 8272746
  * @modules java.base/jdk.internal.util
  * @summary Verify that ZipFile rejects files with CEN sizes exceeding the implementation limit
+ * @library /test/lib
+ * @build jdk.test.lib.util.ZipUtils
  * @run junit/othervm EndOfCenValidation
  */
 
 import jdk.internal.util.ArraysSupport;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
 
-import java.io.*;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.channels.FileChannel;
-import java.nio.charset.StandardCharsets;
+import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.StandardOpenOption;
-import java.util.Arrays;
-import java.util.EnumSet;
-import java.util.HexFormat;
-import java.util.zip.ZipEntry;
 import java.util.zip.ZipException;
 import java.util.zip.ZipFile;
-import java.util.zip.ZipOutputStream;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static jdk.test.lib.util.ZipUtils.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 /**
  * This test augments {@link TestTooManyEntries}. It creates sparse ZIPs where
@@ -65,36 +58,13 @@ import static org.junit.jupiter.api.Assertions.*;
 public class EndOfCenValidation {
 
     // Zip files produced by this test
-    public static final Path CEN_TOO_LARGE_ZIP = Path.of("cen-size-too-large.zip");
-    public static final Path INVALID_CEN_SIZE = Path.of("invalid-zen-size.zip");
-    public static final Path BAD_CEN_OFFSET_ZIP = Path.of("bad-cen-offset.zip");
-    // Some ZipFile constants for manipulating the 'End of central directory record' (END header)
-    private static final int ENDHDR = ZipFile.ENDHDR; // End of central directory record size
-    private static final int ENDSIZ = ZipFile.ENDSIZ; // Offset of CEN size field within ENDHDR
-    private static final int ENDOFF = ZipFile.ENDOFF; // Offset of CEN offset field within ENDHDR
+    static final Path CEN_TOO_LARGE_ZIP = Path.of("cen-size-too-large.zip");
+    static final Path INVALID_CEN_SIZE = Path.of("invalid-zen-size.zip");
+    static final Path BAD_CEN_OFFSET_ZIP = Path.of("bad-cen-offset.zip");
+    static final Path BAD_ENTRY_COUNT_ZIP = Path.of("bad-entry-count.zip");
+
     // Maximum allowed CEN size allowed by ZipFile
-    private static final int MAX_CEN_SIZE = ArraysSupport.SOFT_MAX_ARRAY_LENGTH;
-
-    // Expected message when CEN size does not match file size
-    private static final String INVALID_CEN_BAD_SIZE = "invalid END header (bad central directory size)";
-    // Expected message when CEN offset is too large
-    private static final String INVALID_CEN_BAD_OFFSET = "invalid END header (bad central directory offset)";
-    // Expected message when CEN size is too large
-    private static final String INVALID_CEN_SIZE_TOO_LARGE = "invalid END header (central directory size too large)";
-    // Expected message when total entry count is too large
-    private static final String INVALID_BAD_ENTRY_COUNT = "invalid END header (total entries count too large)";
-
-    // A valid ZIP file, used as a template
-    private byte[] zipBytes;
-
-    /**
-     * Create a valid ZIP file, used as a template
-     * @throws IOException if an error occurs
-     */
-    @BeforeEach
-    public void setup() throws IOException {
-        zipBytes = templateZip();
-    }
+    static final int MAX_CEN_SIZE = ArraysSupport.SOFT_MAX_ARRAY_LENGTH;
 
     /**
      * Delete big files after test, in case the file system did not support sparse files.
@@ -105,6 +75,7 @@ public class EndOfCenValidation {
         Files.deleteIfExists(CEN_TOO_LARGE_ZIP);
         Files.deleteIfExists(INVALID_CEN_SIZE);
         Files.deleteIfExists(BAD_CEN_OFFSET_ZIP);
+        Files.deleteIfExists(BAD_ENTRY_COUNT_ZIP);
     }
 
     /**
@@ -115,14 +86,8 @@ public class EndOfCenValidation {
     @Test
     public void shouldRejectTooLargeCenSize() throws IOException {
         int size = MAX_CEN_SIZE + 1;
-
         Path zip = zipWithModifiedEndRecord(size, true, 0, CEN_TOO_LARGE_ZIP);
-
-        ZipException ex = assertThrows(ZipException.class, () -> {
-            new ZipFile(zip.toFile());
-        });
-
-        assertEquals(INVALID_CEN_SIZE_TOO_LARGE, ex.getMessage());
+        verifyRejection(zip, INVALID_CEN_SIZE_TOO_LARGE);
     }
 
     /**
@@ -133,16 +98,9 @@ public class EndOfCenValidation {
      */
     @Test
     public void shouldRejectInvalidCenSize() throws IOException {
-
         int size = MAX_CEN_SIZE;
-
         Path zip = zipWithModifiedEndRecord(size, false, 0, INVALID_CEN_SIZE);
-
-        ZipException ex = assertThrows(ZipException.class, () -> {
-            new ZipFile(zip.toFile());
-        });
-
-        assertEquals(INVALID_CEN_BAD_SIZE, ex.getMessage());
+        verifyRejection(zip, INVALID_CEN_BAD_SIZE);
     }
 
     /**
@@ -153,16 +111,9 @@ public class EndOfCenValidation {
      */
     @Test
     public void shouldRejectInvalidCenOffset() throws IOException {
-
         int size = MAX_CEN_SIZE;
-
         Path zip = zipWithModifiedEndRecord(size, true, 100, BAD_CEN_OFFSET_ZIP);
-
-        ZipException ex = assertThrows(ZipException.class, () -> {
-            new ZipFile(zip.toFile());
-        });
-
-        assertEquals(INVALID_CEN_BAD_OFFSET, ex.getMessage());
+        verifyRejection(zip, INVALID_CEN_BAD_OFFSET);
     }
 
     /**
@@ -181,192 +132,20 @@ public class EndOfCenValidation {
             Long.MAX_VALUE        // Unreasonably large
     })
     public void shouldRejectBadTotalEntries(long totalEntries) throws IOException {
-        /**
-         * A small ZIP using the ZIP64 format.
-         *
-         * ZIP created using: "echo -n hello | zip zip64.zip -"
-         * Hex encoded using: "cat zip64.zip | xxd -ps"
-         *
-         * The file has the following structure:
-         *
-         * 0000 LOCAL HEADER #1       04034B50
-         * 0004 Extract Zip Spec      2D '4.5'
-         * 0005 Extract OS            00 'MS-DOS'
-         * 0006 General Purpose Flag  0000
-         * 0008 Compression Method    0000 'Stored'
-         * 000A Last Mod Time         5947AB78 'Mon Oct  7 21:27:48 2024'
-         * 000E CRC                   363A3020
-         * 0012 Compressed Length     FFFFFFFF
-         * 0016 Uncompressed Length   FFFFFFFF
-         * 001A Filename Length       0001
-         * 001C Extra Length          0014
-         * 001E Filename              '-'
-         * 001F Extra ID #0001        0001 'ZIP64'
-         * 0021   Length              0010
-         * 0023   Uncompressed Size   0000000000000006
-         * 002B   Compressed Size     0000000000000006
-         * 0033 PAYLOAD               hello.
-         *
-         * 0039 CENTRAL HEADER #1     02014B50
-         * 003D Created Zip Spec      1E '3.0'
-         * 003E Created OS            03 'Unix'
-         * 003F Extract Zip Spec      2D '4.5'
-         * 0040 Extract OS            00 'MS-DOS'
-         * 0041 General Purpose Flag  0000
-         * 0043 Compression Method    0000 'Stored'
-         * 0045 Last Mod Time         5947AB78 'Mon Oct  7 21:27:48 2024'
-         * 0049 CRC                   363A3020
-         * 004D Compressed Length     00000006
-         * 0051 Uncompressed Length   FFFFFFFF
-         * 0055 Filename Length       0001
-         * 0057 Extra Length          000C
-         * 0059 Comment Length        0000
-         * 005B Disk Start            0000
-         * 005D Int File Attributes   0001
-         *      [Bit 0]               1 Text Data
-         * 005F Ext File Attributes   11B00000
-         * 0063 Local Header Offset   00000000
-         * 0067 Filename              '-'
-         * 0068 Extra ID #0001        0001 'ZIP64'
-         * 006A   Length              0008
-         * 006C   Uncompressed Size   0000000000000006
-         *
-         * 0074 ZIP64 END CENTRAL DIR 06064B50
-         *      RECORD
-         * 0078 Size of record        000000000000002C
-         * 0080 Created Zip Spec      1E '3.0'
-         * 0081 Created OS            03 'Unix'
-         * 0082 Extract Zip Spec      2D '4.5'
-         * 0083 Extract OS            00 'MS-DOS'
-         * 0084 Number of this disk   00000000
-         * 0088 Central Dir Disk no   00000000
-         * 008C Entries in this disk  0000000000000001
-         * 0094 Total Entries         0000000000000001
-         * 009C Size of Central Dir   000000000000003B
-         * 00A4 Offset to Central dir 0000000000000039
-         *
-         * 00AC ZIP64 END CENTRAL DIR 07064B50
-         *      LOCATOR
-         * 00B0 Central Dir Disk no   00000000
-         * 00B4 Offset to Central dir 0000000000000074
-         * 00BC Total no of Disks     00000001
-         *
-         * 00C0 END CENTRAL HEADER    06054B50
-         * 00C4 Number of this disk   0000
-         * 00C6 Central Dir Disk no   0000
-         * 00C8 Entries in this disk  0001
-         * 00CA Total Entries         0001
-         * 00CC Size of Central Dir   0000003B
-         * 00D0 Offset to Central Dir FFFFFFFF
-         * 00D4 Comment Length        0000
-         */
+        Path zip = zip64WithModifiedTotalEntries(BAD_ENTRY_COUNT_ZIP, totalEntries);
+        verifyRejection(zip, INVALID_BAD_ENTRY_COUNT);
+    }
 
-        byte[] zipBytes = HexFormat.of().parseHex("""
-                504b03042d000000000078ab475920303a36ffffffffffffffff01001400
-                2d010010000600000000000000060000000000000068656c6c6f0a504b01
-                021e032d000000000078ab475920303a3606000000ffffffff01000c0000
-                00000001000000b011000000002d010008000600000000000000504b0606
-                2c000000000000001e032d00000000000000000001000000000000000100
-                0000000000003b000000000000003900000000000000504b060700000000
-                740000000000000001000000504b050600000000010001003b000000ffff
-                ffff0000
-                """.replaceAll("\n",""));
-
-        // Buffer to manipulate the above ZIP
-        ByteBuffer buf = ByteBuffer.wrap(zipBytes).order(ByteOrder.LITTLE_ENDIAN);
-        // Offset of the 'total entries' in the 'ZIP64 END CENTRAL DIR' record
-        // Update ZIP64 entry count to a value which cannot possibly fit in the small CEN
-        buf.putLong(0x94, totalEntries);
-        // The corresponding END field needs the ZIP64 magic value
-        buf.putShort(0xCA, (short) 0xFFFF);
-        // Write the ZIP to disk
-        Path zipFile = Path.of("bad-entry-count.zip");
-        Files.write(zipFile, zipBytes);
-
-        // Verify that the END header is rejected
+    /**
+     * Verify that ZipFile rejects the ZIP file with a ZipException
+     * with the given message
+     * @param zip ZIP file to open
+     * @param msg exception message to expect
+     */
+    private static void verifyRejection(Path zip, String msg) {
         ZipException ex = assertThrows(ZipException.class, () -> {
-            try (var zf = new ZipFile(zipFile.toFile())) {
-            }
+            new ZipFile(zip.toFile());
         });
-
-        assertEquals(INVALID_BAD_ENTRY_COUNT, ex.getMessage());
-    }
-
-    /**
-     * Create an ZIP file with a single entry, then modify the CEN size
-     * in the 'End of central directory record' (END header)  to the given size.
-     *
-     * The CEN is optionally "inflated" with trailing zero bytes such that
-     * its actual size matches the one stated in the END header.
-     *
-     * The CEN offset is optiontially adjusted by the given amount
-     *
-     * The resulting ZIP is technically not valid, but it does allow us
-     * to test that large or invalid CEN sizes are rejected
-     * @param cenSize the CEN size to put in the END record
-     * @param inflateCen if true, zero-pad the CEN to the desired size
-     * @param cenOffAdjust Adjust the CEN offset field of the END record with this amount
-     * @throws IOException if an error occurs
-     */
-    private Path zipWithModifiedEndRecord(int cenSize,
-                                          boolean inflateCen,
-                                          int cenOffAdjust,
-                                          Path zip) throws IOException {
-
-        // A byte buffer for reading the END
-        ByteBuffer buffer = ByteBuffer.wrap(zipBytes.clone()).order(ByteOrder.LITTLE_ENDIAN);
-
-        // Offset of the END header
-        int endOffset = buffer.limit() - ENDHDR;
-
-        // Modify the CEN size
-        int sizeOffset = endOffset + ENDSIZ;
-        int currentCenSize = buffer.getInt(sizeOffset);
-        buffer.putInt(sizeOffset, cenSize);
-
-        // Optionally modify the CEN offset
-        if (cenOffAdjust != 0) {
-            int offOffset = endOffset + ENDOFF;
-            int currentCenOff = buffer.getInt(offOffset);
-            buffer.putInt(offOffset, currentCenOff + cenOffAdjust);
-        }
-
-        // When creating a sparse file, the file must not already exit
-        Files.deleteIfExists(zip);
-
-        // Open a FileChannel for writing a sparse file
-        EnumSet<StandardOpenOption> options = EnumSet.of(StandardOpenOption.CREATE_NEW,
-                StandardOpenOption.WRITE,
-                StandardOpenOption.SPARSE);
-
-        try (FileChannel channel = FileChannel.open(zip, options)) {
-
-            // Write everything up to END
-            channel.write(buffer.slice(0, buffer.limit() - ENDHDR));
-
-            if (inflateCen) {
-                // Inject "empty bytes" to make the actual CEN size match the END
-                int injectBytes = cenSize - currentCenSize;
-                channel.position(channel.position() + injectBytes);
-            }
-            // Write the modified END
-            channel.write(buffer.slice(buffer.limit() - ENDHDR, ENDHDR));
-        }
-        return zip;
-    }
-
-    /**
-     * Produce a byte array of a ZIP with a single entry
-     *
-     * @throws IOException if an error occurs
-     */
-    private byte[] templateZip() throws IOException {
-        ByteArrayOutputStream bout = new ByteArrayOutputStream();
-        try (ZipOutputStream zo = new ZipOutputStream(bout)) {
-            ZipEntry entry = new ZipEntry("duke.txt");
-            zo.putNextEntry(entry);
-            zo.write("duke".getBytes(StandardCharsets.UTF_8));
-        }
-        return bout.toByteArray();
+        assertEquals(msg, ex.getMessage());
     }
 }
diff --git a/test/jdk/javax/swing/plaf/metal/MetalTitlePaneBug.java b/test/jdk/javax/swing/plaf/metal/MetalTitlePaneBug.java
new file mode 100644
index 00000000000..dde6249752d
--- /dev/null
+++ b/test/jdk/javax/swing/plaf/metal/MetalTitlePaneBug.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8078744
+ * @summary Verifies right half of system menu icon on title bar
+ *          activates when clicked
+ * @library /java/awt/regtesthelpers
+ * @build PassFailJFrame
+ * @run main/manual MetalTitlePaneBug
+ */
+
+import javax.swing.JFrame;
+import javax.swing.UIManager;
+
+public class MetalTitlePaneBug {
+
+    static final String INSTRUCTIONS = """
+        A Frame is shown with a titlepane.
+        Click on the left edge of the system menu icon on the title pane.
+        It should show "Restore", "Minimize", "Maximize", "Close" menu.
+        Click on the right edge of the system menu icon.
+        It should also show "Restore", "Minimize", "Maximize", "Close" menu.
+        If it shows, press Pass else press Fail.
+    """;
+
+    public static void main(String[] args) throws Exception {
+        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
+        PassFailJFrame.builder()
+                .instructions(INSTRUCTIONS)
+                .columns(40)
+                .testUI(MetalTitlePaneBug::createUI)
+                .build()
+                .awaitAndCheck();
+    }
+
+    static JFrame createUI() {
+        JFrame.setDefaultLookAndFeelDecorated(true);
+        JFrame frame = new JFrame();
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setSize(200, 100);
+        return frame;
+    }
+}
diff --git a/test/jdk/jdk/nio/zipfs/EndOfCenValidation.java b/test/jdk/jdk/nio/zipfs/EndOfCenValidation.java
new file mode 100644
index 00000000000..ed0bdbb52ea
--- /dev/null
+++ b/test/jdk/jdk/nio/zipfs/EndOfCenValidation.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @modules java.base/jdk.internal.util
+ * @summary Verify that ZipFileSystem rejects files with CEN sizes exceeding the implementation limit
+ * @library /test/lib
+ * @build jdk.test.lib.util.ZipUtils
+ * @run junit/othervm EndOfCenValidation
+ */
+
+import jdk.internal.util.ArraysSupport;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import java.io.IOException;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.zip.ZipException;
+
+import static jdk.test.lib.util.ZipUtils.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/**
+ * This test augments {@link TestTooManyEntries}. It creates sparse ZIPs where
+ * the CEN size is inflated to the desired value. This helps this test run
+ * fast with much less resources.
+ *
+ * While the CEN in these files are zero-filled and the produced ZIPs are technically
+ * invalid, the CEN is never actually read by ZipFileSystem since it does
+ * 'End of central directory record' (END header) validation before reading the CEN.
+ */
+public class EndOfCenValidation {
+
+    // Zip files produced by this test
+    static final Path CEN_TOO_LARGE_ZIP = Path.of("cen-size-too-large.zip");
+    static final Path INVALID_CEN_SIZE = Path.of("invalid-zen-size.zip");
+    static final Path BAD_CEN_OFFSET_ZIP = Path.of("bad-cen-offset.zip");
+    static final Path BAD_ENTRY_COUNT_ZIP = Path.of("bad-entry-count.zip");
+
+    // Maximum allowed CEN size allowed by ZipFileSystem
+    static final int MAX_CEN_SIZE = ArraysSupport.SOFT_MAX_ARRAY_LENGTH;
+
+    /**
+     * Delete big files after test, in case the file system did not support sparse files.
+     * @throws IOException if an error occurs
+     */
+    @AfterEach
+    public void cleanup() throws IOException {
+        Files.deleteIfExists(CEN_TOO_LARGE_ZIP);
+        Files.deleteIfExists(INVALID_CEN_SIZE);
+        Files.deleteIfExists(BAD_CEN_OFFSET_ZIP);
+        Files.deleteIfExists(BAD_ENTRY_COUNT_ZIP);
+    }
+
+    /**
+     * Validates that an 'End of central directory record' (END header) with a CEN
+     * length exceeding {@link #MAX_CEN_SIZE} limit is rejected
+     * @throws IOException if an error occurs
+     */
+    @Test
+    public void shouldRejectTooLargeCenSize() throws IOException {
+        int size = MAX_CEN_SIZE + 1;
+        Path zip = zipWithModifiedEndRecord(size, true, 0, CEN_TOO_LARGE_ZIP);
+        verifyRejection(zip, INVALID_CEN_SIZE_TOO_LARGE);
+    }
+
+    /**
+     * Validate that an 'End of central directory record' (END header)
+     * where the value of the CEN size field exceeds the position of
+     * the END header is rejected.
+     * @throws IOException if an error occurs
+     */
+    @Test
+    public void shouldRejectInvalidCenSize() throws IOException {
+        int size = MAX_CEN_SIZE;
+        Path zip = zipWithModifiedEndRecord(size, false, 0, INVALID_CEN_SIZE);
+        verifyRejection(zip, INVALID_CEN_BAD_SIZE);
+    }
+
+    /**
+     * Validate that an 'End of central directory record' (the END header)
+     * where the value of the CEN offset field is larger than the position
+     * of the END header minus the CEN size is rejected
+     * @throws IOException if an error occurs
+     */
+    @Test
+    public void shouldRejectInvalidCenOffset() throws IOException {
+        int size = MAX_CEN_SIZE;
+        Path zip = zipWithModifiedEndRecord(size, true, 100, BAD_CEN_OFFSET_ZIP);
+        verifyRejection(zip, INVALID_CEN_BAD_OFFSET);
+    }
+
+    /**
+     * Validate that a 'Zip64 End of Central Directory' record (the END header)
+     * where the value of the 'total entries' field is larger than what fits
+     * in the CEN size is rejected.
+     *
+     * @throws IOException if an error occurs
+     */
+    @ParameterizedTest
+    @ValueSource(longs = {
+            -1,                   // Negative
+            Long.MIN_VALUE,       // Very negative
+            0x3B / 3L - 1,        // Cannot fit in test ZIP's CEN
+            MAX_CEN_SIZE / 3 + 1, // Too large to allocate int[] entries array
+            Long.MAX_VALUE        // Unreasonably large
+    })
+    public void shouldRejectBadTotalEntries(long totalEntries) throws IOException {
+        Path zip = zip64WithModifiedTotalEntries(BAD_ENTRY_COUNT_ZIP, totalEntries);
+        verifyRejection(zip, INVALID_BAD_ENTRY_COUNT);
+    }
+
+    /**
+     * Verify that ZipFileSystem.newFileSystem rejects the ZIP file with a ZipException
+     * with the given message
+     * @param zip ZIP file to open
+     * @param msg exception message to expect
+     */
+    private static void verifyRejection(Path zip, String msg) {
+        ZipException ex = assertThrows(ZipException.class, () -> {
+            FileSystems.newFileSystem(zip);
+        });
+        assertEquals(msg, ex.getMessage());
+    }
+}
diff --git a/test/jdk/sun/security/ssl/SSLSocketImpl/SSLSocketReset.java b/test/jdk/sun/security/ssl/SSLSocketImpl/SSLSocketReset.java
index 6b0f365edc7..64779facd26 100644
--- a/test/jdk/sun/security/ssl/SSLSocketImpl/SSLSocketReset.java
+++ b/test/jdk/sun/security/ssl/SSLSocketImpl/SSLSocketReset.java
@@ -21,16 +21,14 @@
  * questions.
  */
 
-//
-// Please run in othervm mode.  SunJSSE does not support dynamic system
-// properties, no way to re-use system properties in samevm/agentvm mode.
-//
-
 /*
  * @test
  * @bug 8268965
  * @summary Socket reset issue for TLS socket close
- * @run main/othervm -Djdk.net.usePlainSocketImpl=true SSLSocketReset
+ * @comment The test uses SSLContext.getDefault(), so we use othervm to prevent
+ *          usage of unexpected default SSLContext that might be set by some
+ *          other test
+ * @run main/othervm SSLSocketReset
  */
 
 import javax.net.ssl.*;
diff --git a/test/jdk/tools/jpackage/junit/share/jdk.jpackage/jdk/jpackage/internal/util/CommandOutputControlTest.java b/test/jdk/tools/jpackage/junit/share/jdk.jpackage/jdk/jpackage/internal/util/CommandOutputControlTest.java
index d71cf7c4d41..b179f32447f 100644
--- a/test/jdk/tools/jpackage/junit/share/jdk.jpackage/jdk/jpackage/internal/util/CommandOutputControlTest.java
+++ b/test/jdk/tools/jpackage/junit/share/jdk.jpackage/jdk/jpackage/internal/util/CommandOutputControlTest.java
@@ -458,7 +458,7 @@ public class CommandOutputControlTest {
         processDestroyer.get().join();
     }
 
-    @DisabledOnOs(value = OS.MAC, disabledReason = "Closing a stream doesn't consistently cause a trouble as it should")
+    @DisabledOnOs(value = {OS.MAC, OS.LINUX}, disabledReason = "Closing a stream doesn't consistently cause a trouble as expected")
     @ParameterizedTest
     @EnumSource(OutputStreams.class)
     public void test_close_streams(OutputStreams action) throws InterruptedException, IOException {
diff --git a/test/lib/jdk/test/lib/Platform.java b/test/lib/jdk/test/lib/Platform.java
index 75fdef048bc..170e53930d8 100644
--- a/test/lib/jdk/test/lib/Platform.java
+++ b/test/lib/jdk/test/lib/Platform.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -33,6 +33,7 @@ import java.nio.file.Paths;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import java.util.stream.Stream;
 import static java.util.Locale.ROOT;
 
 public class Platform {
@@ -188,14 +189,17 @@ public class Platform {
     }
 
     public static boolean isMusl() {
-        try {
-            ProcessBuilder pb = new ProcessBuilder("ldd", "--version");
+        var lddPath = Stream.of("/bin/ldd", "/usr/bin/ldd").filter(p -> Files.exists(Path.of(p))).findFirst();
+        if (lddPath.isPresent()) {
+            ProcessBuilder pb = new ProcessBuilder(lddPath.get(), "--version");
             pb.redirectErrorStream(true);
-            Process p = pb.start();
-            BufferedReader b = new BufferedReader(new InputStreamReader(p.getInputStream()));
-            String l = b.readLine();
-            if (l != null && l.contains("musl")) { return true; }
-        } catch(Exception e) {
+            try (Process p = pb.start()) {
+                BufferedReader b = new BufferedReader(new InputStreamReader(p.getInputStream()));
+                String l = b.readLine();
+                return (l != null && l.contains("musl"));
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
         }
         return false;
     }
diff --git a/test/lib/jdk/test/lib/util/ZipUtils.java b/test/lib/jdk/test/lib/util/ZipUtils.java
new file mode 100644
index 00000000000..a1568e51cc1
--- /dev/null
+++ b/test/lib/jdk/test/lib/util/ZipUtils.java
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.test.lib.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.channels.FileChannel;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.util.EnumSet;
+import java.util.HexFormat;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipOutputStream;
+
+/**
+ * This class consists exclusively of static utility methods that are useful
+ * for creating and manipulating ZIP files.
+ */
+public final class ZipUtils {
+    // Some ZipFile constants for manipulating the 'End of central directory record' (END header)
+    private static final int ENDHDR = ZipFile.ENDHDR; // End of central directory record size
+    private static final int ENDSIZ = ZipFile.ENDSIZ; // Offset of CEN size field within ENDHDR
+    private static final int ENDOFF = ZipFile.ENDOFF; // Offset of CEN offset field within ENDHDR
+    // Expected message when CEN size does not match file size
+    public static final String INVALID_CEN_BAD_SIZE = "invalid END header (bad central directory size)";
+    // Expected message when CEN offset is too large
+    public static final String INVALID_CEN_BAD_OFFSET = "invalid END header (bad central directory offset)";
+    // Expected message when CEN size is too large
+    public static final String INVALID_CEN_SIZE_TOO_LARGE = "invalid END header (central directory size too large)";
+    // Expected message when total entry count is too large
+    public static final String INVALID_BAD_ENTRY_COUNT = "invalid END header (total entries count too large)";
+
+    private ZipUtils() { }
+
+    /**
+     * Create an ZIP file with a single entry, then modify the CEN size
+     * in the 'End of central directory record' (END header)  to the given size.
+     *
+     * The CEN is optionally "inflated" with trailing zero bytes such that
+     * its actual size matches the one stated in the END header.
+     *
+     * The CEN offset is optiontially adjusted by the given amount
+     *
+     * The resulting ZIP is technically not valid, but it does allow us
+     * to test that large or invalid CEN sizes are rejected
+     * @param cenSize the CEN size to put in the END record
+     * @param inflateCen if true, zero-pad the CEN to the desired size
+     * @param cenOffAdjust Adjust the CEN offset field of the END record with this amount
+     * @throws IOException if an error occurs
+     */
+    public static Path zipWithModifiedEndRecord(int cenSize,
+                                          boolean inflateCen,
+                                          int cenOffAdjust,
+                                          Path zip) throws IOException {
+        // A byte buffer for reading the END
+        ByteBuffer buffer = ByteBuffer.wrap(templateZip()).order(ByteOrder.LITTLE_ENDIAN);
+
+        // Offset of the END header
+        int endOffset = buffer.limit() - ENDHDR;
+
+        // Modify the CEN size
+        int sizeOffset = endOffset + ENDSIZ;
+        int currentCenSize = buffer.getInt(sizeOffset);
+        buffer.putInt(sizeOffset, cenSize);
+
+        // Optionally modify the CEN offset
+        if (cenOffAdjust != 0) {
+            int offOffset = endOffset + ENDOFF;
+            int currentCenOff = buffer.getInt(offOffset);
+            buffer.putInt(offOffset, currentCenOff + cenOffAdjust);
+        }
+        // When creating a sparse file, the file must not already exit
+        Files.deleteIfExists(zip);
+
+        // Open a FileChannel for writing a sparse file
+        EnumSet<StandardOpenOption> options = EnumSet.of(StandardOpenOption.CREATE_NEW,
+                StandardOpenOption.WRITE,
+                StandardOpenOption.SPARSE);
+
+        try (FileChannel channel = FileChannel.open(zip, options)) {
+            // Write everything up to END
+            channel.write(buffer.slice(0, buffer.limit() - ENDHDR));
+            if (inflateCen) {
+                // Inject "empty bytes" to make the actual CEN size match the END
+                int injectBytes = cenSize - currentCenSize;
+                channel.position(channel.position() + injectBytes);
+            }
+            // Write the modified END
+            channel.write(buffer.slice(buffer.limit() - ENDHDR, ENDHDR));
+        }
+        return zip;
+    }
+
+    /**
+     * Create a small Zip64 ZIP file, then modify the Zip64 END header
+     * with a possibly very large total entry count
+     *
+     * @param zip file to write to
+     * @param totalEntries the number of entries wanted in the Zip64 END header
+     * @return the modified ZIP file
+     * @throws IOException if an unexpeced IO error occurs
+     */
+    public static Path zip64WithModifiedTotalEntries(Path zip, long totalEntries) throws IOException {
+        /**
+         * A small ZIP using the ZIP64 format.
+         *
+         * ZIP created using: "echo -n hello | zip zip64.zip -"
+         * Hex encoded using: "cat zip64.zip | xxd -ps"
+         *
+         * The file has the following structure:
+         *
+         * 0000 LOCAL HEADER #1       04034B50
+         * 0004 Extract Zip Spec      2D '4.5'
+         * 0005 Extract OS            00 'MS-DOS'
+         * 0006 General Purpose Flag  0000
+         * 0008 Compression Method    0000 'Stored'
+         * 000A Last Mod Time         5947AB78 'Mon Oct  7 21:27:48 2024'
+         * 000E CRC                   363A3020
+         * 0012 Compressed Length     FFFFFFFF
+         * 0016 Uncompressed Length   FFFFFFFF
+         * 001A Filename Length       0001
+         * 001C Extra Length          0014
+         * 001E Filename              '-'
+         * 001F Extra ID #0001        0001 'ZIP64'
+         * 0021   Length              0010
+         * 0023   Uncompressed Size   0000000000000006
+         * 002B   Compressed Size     0000000000000006
+         * 0033 PAYLOAD               hello.
+         *
+         * 0039 CENTRAL HEADER #1     02014B50
+         * 003D Created Zip Spec      1E '3.0'
+         * 003E Created OS            03 'Unix'
+         * 003F Extract Zip Spec      2D '4.5'
+         * 0040 Extract OS            00 'MS-DOS'
+         * 0041 General Purpose Flag  0000
+         * 0043 Compression Method    0000 'Stored'
+         * 0045 Last Mod Time         5947AB78 'Mon Oct  7 21:27:48 2024'
+         * 0049 CRC                   363A3020
+         * 004D Compressed Length     00000006
+         * 0051 Uncompressed Length   FFFFFFFF
+         * 0055 Filename Length       0001
+         * 0057 Extra Length          000C
+         * 0059 Comment Length        0000
+         * 005B Disk Start            0000
+         * 005D Int File Attributes   0001
+         *      [Bit 0]               1 Text Data
+         * 005F Ext File Attributes   11B00000
+         * 0063 Local Header Offset   00000000
+         * 0067 Filename              '-'
+         * 0068 Extra ID #0001        0001 'ZIP64'
+         * 006A   Length              0008
+         * 006C   Uncompressed Size   0000000000000006
+         *
+         * 0074 ZIP64 END CENTRAL DIR 06064B50
+         *      RECORD
+         * 0078 Size of record        000000000000002C
+         * 0080 Created Zip Spec      1E '3.0'
+         * 0081 Created OS            03 'Unix'
+         * 0082 Extract Zip Spec      2D '4.5'
+         * 0083 Extract OS            00 'MS-DOS'
+         * 0084 Number of this disk   00000000
+         * 0088 Central Dir Disk no   00000000
+         * 008C Entries in this disk  0000000000000001
+         * 0094 Total Entries         0000000000000001
+         * 009C Size of Central Dir   000000000000003B
+         * 00A4 Offset to Central dir 0000000000000039
+         *
+         * 00AC ZIP64 END CENTRAL DIR 07064B50
+         *      LOCATOR
+         * 00B0 Central Dir Disk no   00000000
+         * 00B4 Offset to Central dir 0000000000000074
+         * 00BC Total no of Disks     00000001
+         *
+         * 00C0 END CENTRAL HEADER    06054B50
+         * 00C4 Number of this disk   0000
+         * 00C6 Central Dir Disk no   0000
+         * 00C8 Entries in this disk  0001
+         * 00CA Total Entries         0001
+         * 00CC Size of Central Dir   0000003B
+         * 00D0 Offset to Central Dir FFFFFFFF
+         * 00D4 Comment Length        0000
+         */
+
+        byte[] zipBytes = HexFormat.of().parseHex("""
+                504b03042d000000000078ab475920303a36ffffffffffffffff01001400
+                2d010010000600000000000000060000000000000068656c6c6f0a504b01
+                021e032d000000000078ab475920303a3606000000ffffffff01000c0000
+                00000001000000b011000000002d010008000600000000000000504b0606
+                2c000000000000001e032d00000000000000000001000000000000000100
+                0000000000003b000000000000003900000000000000504b060700000000
+                740000000000000001000000504b050600000000010001003b000000ffff
+                ffff0000
+                """.replaceAll("\n",""));
+
+        // Buffer to manipulate the above ZIP
+        ByteBuffer buf = ByteBuffer.wrap(zipBytes).order(ByteOrder.LITTLE_ENDIAN);
+        // Offset of the 'total entries' in the 'ZIP64 END CENTRAL DIR' record
+        // Update ZIP64 entry count to a value which cannot possibly fit in the small CEN
+        buf.putLong(0x94, totalEntries);
+        // The corresponding END field needs the ZIP64 magic value
+        buf.putShort(0xCA, (short) 0xFFFF);
+        // Write the ZIP to disk
+        Files.write(zip, zipBytes);
+        return zip;
+    }
+
+    /**
+     * Produce a byte array of a ZIP with a single entry
+     *
+     * @throws IOException if an error occurs
+     */
+    private static byte[] templateZip() throws IOException {
+        ByteArrayOutputStream bout = new ByteArrayOutputStream();
+        try (ZipOutputStream zo = new ZipOutputStream(bout)) {
+            ZipEntry entry = new ZipEntry("duke.txt");
+            zo.putNextEntry(entry);
+            zo.write("duke".getBytes(StandardCharsets.UTF_8));
+        }
+        return bout.toByteArray();
+    }
+}
diff --git a/test/micro/org/openjdk/bench/jdk/incubator/vector/Float16OperationsBenchmark.java b/test/micro/org/openjdk/bench/jdk/incubator/vector/Float16OperationsBenchmark.java
index ebbfbb01cc6..cbfe9958924 100644
--- a/test/micro/org/openjdk/bench/jdk/incubator/vector/Float16OperationsBenchmark.java
+++ b/test/micro/org/openjdk/bench/jdk/incubator/vector/Float16OperationsBenchmark.java
@@ -20,7 +20,7 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
-package org.openjdk.bench.java.lang;
+package org.openjdk.bench.jdk.incubator.vector;
 
 import java.util.stream.IntStream;
 import java.util.concurrent.TimeUnit;