HashSet with two equals object?

Question

I created an object HashSet, and the value is an object (Triple) which is my own class. But I get a strange thing, when there are two equal objects on my HashSet, is it poss

Answer 1

You didn't override equals and hashCode in your class properly. Here's how to write it and test it :

http://java.sun.com/developer/Books/effectivejava/Chapter3.pdf