What is the main purpose of interface in java why not use simply the multiple inheritance ?

Answer 1

An interface is just a fully abstract class, and multiple inheritance means inheriting from several classes at once. Those are two sepearte notions, and I don't see what you are getting at. Could you please reformulate your question?

Answer 2

Your quesion was kind of pointless, every need you can use what is required in linguaguem you.