why?

Question

What is the need of implementing comparator interface which consist of compare method which we implement in our own way..then it is just a concept only..we r not getting anything in build

Answer 1

The language designers cannot foresee what types the programmers will be dealing with and comparing with each other. So an interface for comparing provides a GCD in the form of a compare method. One programmer might be comparing smartphone while another may be interested in working out the most cost effective route from a source to destination.