Write a java program to create an abstract class named Shape that contains two integers and an empty method named printArea().

Write a java program 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 such that each one of the classes extends the class Shape. Each one of the classes contain only the method printArea( ) that prints the area of the given shape.

import java.util.*;

class Demo{

    public static void main(String ts7[]){

        int ch;

        Rectangle ob1=new Rectangle();

        Triangle ob2=new Triangle();

        Circle ob3=new Circle();

        Scanner sc=new Scanner(System.in);

        System.out.println("Enter:\n1.Rectangle\n2.Triangle\n3.Circle\nEnter your Choice:");

ch=sc.nextInt();

        switch(ch){

            case 1: ob1.printArea(); break;

            case 2: ob2.printArea(); break;

            case 3: ob3.printArea(); break;

            default: System.out.println("Wrong Choice!");   }

    }}

abstract class Shape{

    int i1,i2;

    abstract void printArea();}

class Rectangle extends Shape{

    Scanner sc=new Scanner(System.in);

    int area=0;

    void printArea()    {

System.out.println("Enter length of the Rectangle:");

        i1=sc.nextInt();

System.out.println("Enter breadth of the Rectangle:");

        i2=sc.nextInt();

            area=i1*i2;

System.out.println("Area of the rectangle:"+area);}}

class Triangle extends Shape{

    Scanner sc=new Scanner(System.in);

    int area=0;

    void printArea(){

System.out.println("Enter height of the Triangle:");

        i1=sc.nextInt();

System.out.println("Enter base of the Triangle:");

        i2=sc.nextInt();

        area=(i1*i2)/2;

System.out.println("Area of the Triangle:"+area);

    }}

class Circle extends Shape{

    Scanner sc=new Scanner(System.in);

    double area=0;

    void printArea()    {

System.out.println("Enter radius of the Circle:");

        i1=sc.nextInt();

        area=(22*i1*i1)/7;

System.out.println("Area of the Circle:"+area);

    }

}

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