Amirul World

Polymorphism is the ability of an object to take on many forms. The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object. Any Java object that can pass more than one IS-A test is considered to be polymorphic

There are two types of polymorphism in java: compile time polymorphism and runtime polymorphism. We can perform polymorphism in java by method overloading and method overriding.

Example of method overloading

	class OverloaddingDemo{
	void sum(int a, int b){
	System.out.println("Adding a+b:"+(a+b));
	}
	void sum(int a, int b, int c ){
	System.out.println("Adding a+b+c:"+(a+b+c));
	}
	public static void main(String args[]){
	OverloaddingDemo ad = new OverloaddingDemo();
	ad.sum(25,30);
	ad.sum(25,30,20);
	}
	}

view raw OverloaddingDemo.java hosted with ❤ by GitHub

Example of method overriding

	class Dept{
	void address(){
	System.out.println("Acadimic Building , Just");
	}
	}
	class Cse extends Dept{
	void address(){
	System.out.println(" 2nd floar , Acadimic Building , Just");
	}
	public static void main(String args[]){
	Dept d = new Dept();
	Cse ad = new Cse();
	d.address();
	ad.address();
	}
	}

view raw OverriddingDemo.java hosted with ❤ by GitHub