Question

why we use classes in java?

Answer 1

Not sure what you mean by this. Java as a language is built around the concepts of classes and objects, so there isn't really a way of answering this that isn't circular :)

Answer 2

It is a rather recursive question isn't it?

Answer 3

Classes are the mechanism used by Java to define and determine the relationships between the objects used in an application. Now, not all OO programming languages require the use/specification of classes for the definition of the objects, but Java designers decided to make use of the concept of classes.

Answer 4

@ marguedas: Which OOP languages do not use classes?