// Shape Class

class Shape {

  public double getArea() {

    return 0;

  }

}

​

// A Rectangle is a Shape

class Rectangle extends Shape {  // extended form the Shape class

​

  private double length;

  private double width;

  public Rectangle(double length, double width) {

    this.length = length;

    this.width = width;

  }

​

  public double getArea() {

    return this.width * this.length;

  }

}

​

// A Circle is a Shape

class Circle extends Shape {

​

  private double radius;

  public Circle(double radius) {

    this.radius = radius;

  }

​

  public double getArea() {

    return 3.13 * this.radius * this.radius;

  }

​

​

  public static void main(String args[]) {

    Shape[] shape = new Shape[2]; // Creating the shape array of size 2

​

    shape[0] = new Circle(3); // creating the circle object at index 0

    shape[1] = new Rectangle(2, 3); // creating the rectangle object at index 1

​

    System.out.println("Area of Circle: " + shape[0].getArea());

    System.out.println("Area of Rectangle: " + shape[1].getArea());

  }

​

}