Polymorphism

Polymorphism

One Name and many forms, Polymorphism is one of the fundamental concepts of OOP.

Polymorphism is of two types:

1. Compile time polymorphism/Overloading

2. Run time polymorphism/Overriding

Compile time polymorphism/Overloading (early binding):

In this type of polymorphism, compiler at compile time  identifies which form it has to execute

There are few advantages of compile time polymorphism:

Advantage of early binding is execution will be fast. Because every thing about the method is known to compiler during compilation it self

But disadvantage is lack of flexibility.

   Eg: Method Overloading

          Operator Overloading

Run time polymorphism/Overriding (Late binding):

In this type of polymorphism, compiler at Run time  identifies which form it has to execute

There are few advantages of run time polymorphism

Advantage of Late binding is execution will be slow. Because every thing about the method is known to compiler during run time

Example of Run time Polymorphism is:

Interface

Method overriding

Examples of early binding are overloaded methods, overloaded operators and overridden methods that are called directly by using derived objects.