Java, Object.hashCode() result constant across all JVMs/Systems?

Question

Is the output of Object.hashCode() required to be the same on all JVM implementations for the same Object?

For example if \"test\".hashCode()

Answer 1

No, the result of hashCode() is only constant during a single execution. You should not expect the result of the function to be the same between executions, let alone between JRE versions or platforms.