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geometry.java

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/*

* To create an abstract class named Shape that contains two integers and an

* empty method named printArea. Provide three classes named Rectangle, Triangle

* and Circle subclass that each one of the classes extends the Class Shape.

* Each one of the classes contains only the method printArea() that prints the

* area of Shape.

*/

package Abstract_Class;

abstract class Shape{

public int x, y;

public abstract void printArea();

}

class Rectangle extends Shape{

public void printArea(){

System.out.println("Area of rectangle :" + x * y);

}

}

class Triangle extends Shape{

public void printArea(){

System.out.println("Area of triangle :" + (x * y) / 2);

}

}

class Circle extends Shape{

public void printArea(){

System.out.println("Area of circle :" + (22 * x * x) / 7);

}

}

public class geometry {

public static void main(String[] args){

Rectangle r =new Rectangle();

r.x = 10;

r.y = 20;

r.printArea();

System.out.println("-------------------------------------");

Triangle t = new Triangle();

t.x = 30;

t.y = 35;

t.printArea();

System.out.println("-------------------------------------");

Circle c = new Circle();

c.x = 2;

c.printArea();

System.out.println("-------------------------------------");

}

}