Question

Possible Duplicate:
what is an objects hashcode
How do hashCode() and identityHashCode() work at the back end?

I’m not talking about String class or any other class where the hashcode is overridden. Say if I just create a new object of the Object class, then will the hashcode() or to be true in any case, identityHashCode(Object x) return the memory address of that object?

Answer 1

Not necessarily. From the documentation (emphasis mine):

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)