Here is an example image Here is starting code /* Programmer: Date: Project: Pon

Question

Here is an example image Here is starting code
/* Programmer: Date: Project: Pong Game File Name: PongGame.java Program Description: Create a simple pong game with a background and scoreboard */ import java.util.*; public class PongGame{ public static void main( String[] args ){ /* Programmer: Date: Project: Pong Game File Name: PongGame.java Program Description: Create a simple pong game with a background and scoreboard */ import java.util.*; public class PongGame{ public static void main( String[] args ){
Pong - LEuBns 5 CO 05

Explanation / Answer

Answer:

Ball.java

package pongGame;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Rectangle;

import java.util.Random;

public class Ball implements Runnable {

//global variables

int x, y, xDirection, yDirection;

int p1score, p2score;

Paddle p1 = new Paddle(10, 25, 1);

Paddle p2 = new Paddle(485, 25, 2);

Rectangle ball;

public Ball(int x, int y){

p1score = p2score = 0;

this.x = x;

this.y = y;

//Set ball moving randomly

Random r = new Random();

int rXDir = r.nextInt(1);

if (rXDir == 0)

rXDir--;

setXDirection(rXDir);

int rYDir = r.nextInt(1);

if (rYDir == 0)

rYDir--;

setYDirection(rYDir);

//create "ball"

ball = new Rectangle(this.x, this.y, 15, 15);

}

public void setXDirection(int xDir){

xDirection = xDir;

}

public void setYDirection(int yDir){

yDirection = yDir;

}

public void draw(Graphics g) {

g.setColor(Color.WHITE);

g.fillRect(ball.x, ball.y, ball.width, ball.height);

}

public void collision(){

if(ball.intersects(p1.paddle))

setXDirection(+1);

if(ball.intersects(p2.paddle))

setXDirection(-1);

}

public void move() {

collision();

ball.x += xDirection;

ball.y += yDirection;

//bounce the ball when it hits the edge of the screen

if (ball.x <= 0) {

setXDirection(+1);

p2score++;

}

if (ball.x >= 485) {

setXDirection(-1);

p1score++;

}

if (ball.y <= 15) {

setYDirection(+1);

}

if (ball.y >= 385) {

setYDirection(-1);

}

}

@Override

public void run() {

try {

while(true) {

move();

Thread.sleep(8);

}

}catch(Exception e) { System.err.println(e.getMessage()); }

}

}

Paddle.java

package pongGame;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Rectangle;

import java.awt.event.KeyEvent;

public class Paddle implements Runnable{

int x, y, yDirection, id;

Rectangle paddle;

public Paddle(int x, int y, int id){

this.x = x;

this.y = y;

this.id = id;

paddle = new Rectangle(x, y, 10, 50);

}

public void keyPressed(KeyEvent e) {

switch(id) {

default:

System.out.println("Please enter a Valid ID in paddle contructor");

break;

case 1:

if(e.getKeyCode() == KeyEvent.VK_W) {

setYDirection(-1);

if(e.getKeyCode() == KeyEvent.VK_S) {

setYDirection(1);

}

break;

}

case 2:

if(e.getKeyCode() == KeyEvent.VK_UP) {

setYDirection(-1);

}

if(e.getKeyCode() == KeyEvent.VK_DOWN) {

setYDirection(1);

}

break;

}

}

public void keyReleased(KeyEvent e) {

switch(id) {

default:

System.out.println("Please enter a Valid ID in paddle contructor");

break;

case 1:

if(e.getKeyCode() == e.VK_UP) {

setYDirection(0);

}

if(e.getKeyCode() == e.VK_DOWN) {

setYDirection(0);

}

break;

case 2:

if(e.getKeyCode() == e.VK_W) {

setYDirection(0);

}

if(e.getKeyCode() == e.VK_S) {

setYDirection(0);

}

break;

}

}

public void setYDirection(int yDir) {

yDirection = yDir;

}

public void move() {

paddle.y += yDirection;

if (paddle.y <= 15)

paddle.y = 15;

if (paddle.y >= 340);

paddle.y = 340;

}

public void draw(Graphics g) {

switch(id) {

default:

System.out.println("Please enter a Valid ID in paddle contructor");

break;

case 1:

g.setColor(Color.CYAN);

g.fillRect(paddle.x, paddle.y, paddle.width, paddle.height);

break;

case 2:

g.setColor(Color.pink);

g.fillRect(paddle.x, paddle.y, paddle.width, paddle.height);

break;

}

}

@Override

public void run() {

try {

while(true) {

move();

Thread.sleep(7);

}

} catch(Exception e) { System.err.println(e.getMessage()); }

}

}

Pong.java

package pongGame;

import java.awt.*;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import javax.swing.*;

public class Pong extends JFrame {

//screen size variables.

int gWidth = 500;

int gHeight = 400;

Dimension screenSize = new Dimension(gWidth, gHeight);

Image dbImage;

Graphics dbGraphics;

//ball object

static Ball b = new Ball(250, 200);

//constructor for window

public Pong() {

this.setTitle("Pong!");

this.setSize(screenSize);

this.setResizable(false);

this.setVisible(true);

this.setBackground(Color.DARK_GRAY);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.addKeyListener(new AL());

}

public static void main(String[] args) {

Pong pg = new Pong();

//create and start threads.

Thread ball = new Thread(b);

ball.start();

Thread p1 = new Thread(b.p1);

Thread p2 = new Thread(b.p2);

p2.start();

p1.start();

}

@Override

public void paint(Graphics g) {

dbImage = createImage(getWidth(), getHeight());

dbGraphics = dbImage.getGraphics();

draw(dbGraphics);

g.drawImage(dbImage, 0, 0, this);

}

public void draw(Graphics g) {

b.draw(g);

b.p1.draw(g);

b.p2.draw(g);

g.setColor(Color.WHITE);

g.drawString(""+b.p1score, 15, 20);

g.drawString(""+b.p2score, 385, 20);

repaint();

}

public class AL extends KeyAdapter {

@Override

public void keyPressed(KeyEvent e) {

b.p1.keyPressed(e);

b.p2.keyPressed(e);

}

@Override

public void keyReleased(KeyEvent e) {

b.p1.keyReleased(e);

b.p2.keyReleased(e);

}

}

}

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