Returns the same hash code for the given object as would be returned by the default method hashCode(), whether or not the given object’s class overrides hashCode(). The System.identityHashCode ...

Now, that gets very, very interesting because it, uh, requires a bit of knowledge of the hashCode method, and it also requires a little bit of knowledge of the equals method. And by the way, just to ...

Many Java developers follow the Joshua Bloch’s advice for implementing these methods as described in Effective Java ... and hashCode() methods using EqualsBuilder and HashCodeBuilder respectively.