Design an JAVA applet for Bouncing of a Ball.

PROGRAM :

package com.company;

import java.applet.Applet;

import java.awt.Color;

import java.awt.Graphics;

/*<applet code= "Bounce.class" height=900 width=900></applet>*/

class Ball

{

    int x,y,radius,dx,dy;

    Color BallColor;

    public Ball(int x,int y,int radius,int dx,int dy,Color bColor)

    {

        this.x=x;

        this.y=y;

        this.radius=radius;

        this.dx=dx;

        this.dy=dy;

        BallColor=bColor;

    }

}

public class Bounce extends Applet implements Runnable

{

    Ball redBall;

    public void init()

    {

        redBall=new Ball(250,80,50,2,4,Color.red);

        Thread t=new Thread(this);

        t.start();

    }

    public void paint(Graphics g)

    {

        g.setColor(redBall.BallColor);

        setBackground(Color.pink);

        g.fillOval(redBall.x, redBall.y, redBall.radius,redBall.radius);

        g.drawLine(150,400,50,500);

        g.drawLine(150,400,450,400);

        g.drawLine(50,500,350,500);

        g.drawLine(450,400,350,500);

        g.drawRect(50,500,20,100);

        g.drawRect(330,500,20,100);

        g.drawLine(450,400,450,500);

        g.drawLine(430,500,450,500);

        g.drawLine(430,500,430,420);

    }

    public void run()

    {

        while(true)

    {

        try

        {

            displacementOperation(redBall);

            Thread.sleep(20);

            repaint();

        }

        catch(Exception e)

        {

        }

    }

    }

    public void displacementOperation(Ball ball)

    {

        if(ball.y>= 400 || ball.y<= 0)

        {

            ball.dy=-ball.dy;

        }

        ball.y=ball.y+ball.dy;

    }

}

 

OUTPUT :