Implementing the equals method in java

Question

This is my implementation of the equals class for a Coor class which is just contains 2 ints x and y. would this be the proper way of implementing this method?

Answer 1

I believe this would work, at a quick glance. I say this because:

1. It handles a null/improper types well.
2. Performing x.equals(y) would yield the same result as y.equals(x).
3. Performing x.equals(x) would return true.
4. Performing x.equals(y) == true and y.equals(z) == true implies that x.equals(z) == true

This question has certainly been asked many times before though. See here: Overriding equals and hashCode in Java. A book called Effective Java discusses this topic in great detail too, and the particular chapter is linked off of there.