Usage of Polymorphism

class Animal{
 void printMsg(){
  System.out.println("I am Animal, I am the super class for all Animals");
 }
}

class Tiger extends Animal{
 void printMsg(){
  System.out.println("I am tiger");
 }
}

  

class Elephant extends Animal{
 void printMsg(){
  System.out.println("I am Elephant");
 }
}

class Lion extends Animal{
 void printMsg(){
  System.out.println("I am Lion");
 }
}

class PolyTest{
 public static void main(String args[]){
  Animal anim1;
  
  anim1 = new Animal();
  anim1.printMsg();
  
  anim1 = new Tiger();
  anim1.printMsg();
  
  anim1 = new Elephant();
  anim1.printMsg();
  
  anim1 = new Lion();
  anim1.printMsg();
 }
}

Output

I am Animal, I am the super class for all Animals
I am tiger
I am Elephant
I am Lion

As you observe the above program, anim1 is a reference variable of class Animal, by using this reference variable, we pointed to the objects which are sub classes of the class Animal.

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