1 /* 2 * @test /nodynamiccopyright/ 3 * @summary Value types do not support identityHashCode 4 * @modules java.base/jvm.internal.value 5 * @compile/fail/ref=CheckIdentityHash.out -XDrawDiagnostics -Werror -Xlint:values CheckIdentityHash.java 6 */ 7 @jvm.internal.value.ValueCapableClass 8 final class CheckIdentityHash { 9 int identityHashCode(CheckIdentityHash x) { 10 return 0; 11 } 12 void test(CheckIdentityHash v) { 13 this.identityHashCode(v); // <- ok 14 System.identityHashCode(v); // <- error 15 System.identityHashCode(this); // <- error 16 java.lang.System.identityHashCode(v); // <- error 17 java.lang.System.identityHashCode(this); // <- error 18 } 19 }