Polymorphism in Java Programs

ℚ. 1 Java Runtime Polymorphism Example: Animal
➚ Long Program Share

class Animal{
void eat(){
	System.out.println("eating...");
	}
}

class Cow extends Animal{
void eat(){
	System.out.println("eating grass..");
	}
}

class Cat extends Animal{
void eat(){
	System.out.println("eating rat...");
	}
}

class Peacock extends Animal{
void eat(){
	System.out.println("eating snake...");
	}
}

class Lion extends Animal{
void eat(){
	System.out.println("eating meat...");
	}
}

class RuntimePolymor{
 public static void main(String[] args){
 Animal obj;
 obj=new Cow();
 obj.eat();

 obj=new Cat();
 obj.eat();

 obj=new Peacock();
 obj.eat();

 obj=new Lion();
 obj.eat();
 }
}

  

eating grass..
eating rat...
eating snake...
eating meat...
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ℚ. 2 Note:Runtime polymorphism can't be achieved by data members.
➚ Long Program Share

 class Parent {
 int age=70;
}
class ChildClass extends Parent{
 int age=20;

 public static void main(String args[]){
  Parent obj=new Child();
  System.out.println(obj.age); // result will be 70
 }
}

70
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