Java – define multiple hash functions for the same object

I have several collections that store objects of the same class, but I want to specify a different identification function for each of them (that is, if AX = = BX, in one set a = = B and in another set a = = b) if ay = = by)

At present, I use TreeSet and define different comparators for each TreeSet I want to know if I want to switch to hashsets, I can do the same thing Java does not allow separate hash functions to be passed in the same way that comparators are allowed to sort / tree based collections The only way I can think of doing this is to create a different wrapper class and implement the hashcode () method in each HashSet element Is there a better way?

Solution

You can try using thashset in GNU trove, which supports multiple hash policies