What are the advantages of polymorphism in Java ?

Polymorphism is the third essential feature of an object-oriented programming language, after data abstraction and inheritance. I have seen lot's of people NOT clear with what polymorphism is or they often stumble when somene ask them to explain, so be very sure what it is. Just remember this - Poly means Multiple and Morphe means types Shape. So Polymorphism deals with one thing which can have multiple shapes. Polymorphism can be applied on both datatypes as well as on Functions. I will highly advice you to check Wiki Link on Polymorphism Polymorphism allows improved code organization and readability as well as the creation of extensible programs that can be “grown” not only during the original creation of the project, but also when new features are desired. If you still don't understand it than post in forum and I will see what I can do for you. It's a very abstract topic actually.