Best implementation for hashCode method for a collection

Question

How do we decide on the best implementation of hashCode() method for a collection (assuming that equals method has been overridden correctly) ?

Answer 1

If you use eclipse, you can generate equals() and hashCode() using:

Source -> Generate hashCode() and equals().

Using this function you can decide which fields you want to use for equality and hash code calculation, and Eclipse generates the corresponding methods.