Polymorphism is an important feature of OOP . It simply means '
one name many form' . It is the ability to take more than form .
There are basically two types of polymorphism.
(1) Compile Time (also knows as Early binding) .
(2) Run Time (also knows as Late binding) Polymorphism .
Compile Time Polymorphism
In Compile Time Polymorphism Object knows about itself at
compile time.
Overloading is a compile time polymorphism. In Overloading method should
have same name with different arguments. Simple example of overloading is
if you have scenario in which you want do sum of two or three number what
ever user will pass. So you can create two methods with same name
Sum and assign
2 and 3 arguments into it.
Run Time Polymorphism
In Run Time Polymorphism, Object does not know about itself at compile time
it assigns all the properties and methods at
runtime.
Overriding or
inheritance-based polymorphism are kind of polymorphism. Simple and very common
example if you have a
class shape which is inherited to
Triangle,
Square and
Circle classes.
Shape class has a method name as
Draw which
will definitely inherited to all inherited class. Now, if you declare a variable
of shape class and initialize it with any of the inherited class it will call
the method of inherited class.
