JAVA PROGRAM TO DEMONSTRATE RUNTIME POLYMORPHISM

Program Statement: Write a JAVA program to demonstrate runtime polymorphism.

Tested on:

Software: Windows 8, Jdk 1.6,   Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
abstract class Shape
{
    abstract void area();
}
class Rectangle extends Shape
{
    @Override
    void area()
    {
    int l=10,b=20;
    System.out.println("The area of rectangle is:"+l*b);
    }
}
class Square extends Shape
{
    void area()
    {
        int l=10;
        System.out.println("The area of square is:"+l*l);
    }
}
public class RuntimePolymorphism
{

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
    Shape s;
    Rectangle r=new Rectangle();
    Square s1=new Square();
    s=r;
    s.area();
    s=s1;
    s.area();
   
    }
   
}

Output

The area of rectangle is:200
The area of square is:100