From b8189ae809feba19cac982296754f244bf33f136 Mon Sep 17 00:00:00 2001
From: Justin Lu <jlu@openjdk.org>
Date: Tue, 5 May 2026 18:27:05 +0000
Subject: [PATCH] 8381984: Test jdk/nio/zipfs/ZipFSTester.java fails with
 mismatched timestamp

Reviewed-by: jpai, lancea
---
 test/jdk/jdk/nio/zipfs/ZipFSTester.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/jdk/jdk/nio/zipfs/ZipFSTester.java b/test/jdk/jdk/nio/zipfs/ZipFSTester.java
index 2ca4686ff14..7325514b1ce 100644
--- a/test/jdk/jdk/nio/zipfs/ZipFSTester.java
+++ b/test/jdk/jdk/nio/zipfs/ZipFSTester.java
@@ -646,6 +646,11 @@ public class ZipFSTester {
     @Test
     void testTime() throws Exception {
         var jar = Utils.createJarFile(System.currentTimeMillis() + ".jar", jarContents);
+        // Read JAR source once before capturing file attributes.
+        // This stabilizes access time before the copy operation.
+        try (InputStream in = Files.newInputStream(jar)) {
+            in.transferTo(OutputStream.nullOutputStream()); // output is irrelevant
+        }
         BasicFileAttributes attrs = Files
                         .getFileAttributeView(jar, BasicFileAttributeView.class)
                         .readAttributes();