posted 12 years ago
No, the inverse is not true. If you look at the API Spec for Object, you'd see this under the description of the hashcode method:
It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables.