How default .equals and .hashCode will work for my classes?

Question

Say I have my own class

public class MyObj { /* ... */ }

It has some attributes and methods. It DOES NOT implement equals, DOES NOT impleme

Answer 1

IBM's developerworks says:

Under this default implementation, two references are equal only if they refer to the exact same object. Similarly, the default implementation of hashCode() provided by Object is derived by mapping the memory address of the object to an integer value.

However, to be sure of the exact implementation details for a particular vendor's Java version it's probably best to look as the source (if it's available)