Is it possible in java make something like Comparator but for implementing custom equals() and hashCode()

Question

I have an array of objects and I want to concatenate it with another array of objects, except that objects that have same id\'s. That objects are used in many places in the

Answer 1

Would using a TreeSet help here? A TreeSet actually performs ordering and Set based behavior using compare/compareTo and allows you to define a custom Comparator for use in one of the constructors.