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Only resolve object methods on interfaces

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This commit is contained in:
Liam Miller-Cushon 2026-01-19 10:49:44 +01:00
parent 6ce63a4a5b
commit e6c4855a93
2 changed files with 26 additions and 6 deletions
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14
src/jdk.compiler/share/classes/com/sun/tools/javac/comp/LambdaToMethod.java
View File

@ -702,12 +702,14 @@ public class LambdaToMethod extends TreeTranslator {
String functionalInterfaceClass = classSig(targetType);
String functionalInterfaceMethodName = samSym.getSimpleName().toString();
String functionalInterfaceMethodSignature = typeSig(types.erasure(samSym.type));
Symbol baseMethod = types.overriddenObjectMethod(refSym.enclClass(), refSym);
if (baseMethod != null) {
// The implementation method is a java.lang.Object method, runtime will resolve this method to
// a java.lang.Object method, so do the same.
// This case can be removed if JDK-8172817 is fixed.
refSym = ((MethodSymbol) baseMethod).asHandle();
if (refSym.enclClass().isInterface()) {
Symbol baseMethod = types.overriddenObjectMethod(refSym.enclClass(), refSym);
if (baseMethod != null) {
// The implementation method is a java.lang.Object method, runtime will resolve this method to
// a java.lang.Object method, so do the same.
// This case can be removed if JDK-8172817 is fixed.
refSym = ((MethodSymbol) baseMethod).asHandle();
}
}
String implClass = classSig(types.erasure(refSym.owner.type));
String implMethodName = refSym.getQualifiedName().toString();

18
test/langtools/tools/javac/lambda/SerializableObjectMethodReferencesOnInterfaces.java
View File

@ -63,9 +63,15 @@ public class SerializableObjectMethodReferencesOnInterfaces {
R apply(T t);
}
enum E {
ONE
}
void f() throws Exception {
F<I1, Integer> f1 = I1::hashCode;
F<I2, Integer> f2 = I2::hashCode;
F<E, Integer> f3 = E::hashCode;
F<Object, Integer> f4 = Object::hashCode;
}
}
@ -91,6 +97,18 @@ public class SerializableObjectMethodReferencesOnInterfaces {
getFunctionalInterfaceMethodSignature (Ljava/lang/Object;)Ljava/lang/Object;
getImplClass java/lang/Object
getImplMethodSignature ()I
getImplMethodKind 5
getFunctionalInterfaceClass SerializableObjectMethodReferencesOnInterfaces$Test$F
getFunctionalInterfaceMethodName apply
getFunctionalInterfaceMethodSignature (Ljava/lang/Object;)Ljava/lang/Object;
getImplClass java/lang/Enum
getImplMethodSignature ()I
getImplMethodKind 5
getFunctionalInterfaceClass SerializableObjectMethodReferencesOnInterfaces$Test$F
getFunctionalInterfaceMethodName apply
getFunctionalInterfaceMethodSignature (Ljava/lang/Object;)Ljava/lang/Object;
getImplClass java/lang/Object
getImplMethodSignature ()I
""";
if (!actual.equals(expected)) {
throw new AssertionError(