Java many to many association map

Question

I have two classes, ClassA and ClassB, as well as a \"many to many\" AssociationClass. I want a structure that holds the associations

Answer 1

rmarimon is right that it requires two maps, but I think you want A-B, not A-data and B-data.

So you just simply need two maps:

    Hashmap bByA = new HashMap();
    Hashmap aByB = new HashMap();

This gives you everything you seem to want, free and easy.