Game Pong

     Pada projek kali ini, saya membuat sebuah replika dari game yang jadul dan paling terkenal  pada tanggal 29 Desember 1972 yaitu Game Pong. Game ini didasari oleh olahraga tenis meja. Game pong ini bisa dimainkan terhadap dua player atau satu player melawan sebuah bot. Oleh karena itu, untuk membuat Game pong ini mempunyai 5 class :

    1.    Pong.java         : Class utama untuk game pong ini, class ini merupakan penghubung semua class.

    2.    Ball.java      : Class yang berisi tentang kemungkinan-kemungkinan yang terjadi pada bola pada saat berpindah tempat

    3.    Paddle.java     : Class yang berisi tongkat pemukul untuk game pong tersebut

    4.    Renderer.java : Class untuk merender dan mengimplementasikan JFrame

Diagram Class :

   

Source Code

Pong.java 

	import java.awt.BasicStroke;
	import java.awt.Color;
	import java.awt.Font;
	import java.awt.Graphics2D;
	import java.awt.RenderingHints;
	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	import java.awt.event.KeyEvent;
	import java.awt.event.KeyListener;
	import java.util.Random;
	import javax.swing.JFrame;
	import javax.swing.Timer;
	public class Pong implements ActionListener, KeyListener
	{
	public static Pong pong;
	public int width = 1080, height = 720;
	public Renderer renderer;
	public Paddle player1;
	public Paddle player2;
	public Ball ball;
	public boolean bot = false, selectingDifficulty;
	public boolean w, s, up, down;
	public int gameStatus = 0, scoreLimit = 7, playerWon; //0 = Menu, 1 = Paused, 2 = Playing, 3 = Over
	public int botDifficulty, botMoves, botCooldown = 0;
	public Random random;
	public JFrame jframe;
	public Pong()
	{
	Timer timer = new Timer(20, this);
	random = new Random();
	jframe = new JFrame("Pong");
	renderer = new Renderer();
	jframe.setSize(width + 15, height + 35);
	jframe.setVisible(true);
	jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	jframe.add(renderer);
	jframe.addKeyListener(this);
	timer.start();
	}
	public void start()
	{
	gameStatus = 2;
	player1 = new Paddle(this, 1);
	player2 = new Paddle(this, 2);
	ball = new Ball(this);
	}
	public void update()
	{
	if (player1.score >= scoreLimit)
	{
	playerWon = 1;
	gameStatus = 3;
	}
	if (player2.score >= scoreLimit)
	{
	gameStatus = 3;
	playerWon = 2;
	}
	if (w)
	{
	player1.move(true);
	}
	if (s)
	{
	player1.move(false);
	}
	if (!bot)
	{
	if (up)
	{
	player2.move(true);
	}
	if (down)
	{
	player2.move(false);
	}
	}
	else
	{
	if (botCooldown > 0)
	{
	botCooldown--;
	if (botCooldown == 0)
	{
	botMoves = 0;
	}
	}
	if (botMoves < 10)
	{
	if (player2.y + player2.height / 2 < ball.y)
	{
	player2.move(false);
	botMoves++;
	}
	if (player2.y + player2.height / 2 > ball.y)
	{
	player2.move(true);
	botMoves++;
	}
	if (botDifficulty == 0)
	{
	botCooldown = 20;
	}
	if (botDifficulty == 1)
	{
	botCooldown = 15;
	}
	if (botDifficulty == 2)
	{
	botCooldown = 10;
	}
	}
	}
	ball.update(player1, player2);
	}
	public void render(Graphics2D g)
	{
	g.setColor(Color.BLACK);
	g.fillRect(0, 0, width, height);
	g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
	if (gameStatus == 0)
	{
	g.setColor(Color.WHITE);
	g.setFont(new Font("Arial", 1, 50));
	g.drawString("PONG", width / 2 - 75, 50);
	if (!selectingDifficulty)
	{
	g.setFont(new Font("Arial", 1, 30));
	g.drawString("Press Space to Play", width / 2 - 150, height / 2 - 25);
	g.drawString("Press Shift to Play with Bot", width / 2 - 200, height / 2 + 25);
	g.drawString("<< Score Limit: " + scoreLimit + " >>", width / 2 - 150, height / 2 + 75);
	}
	}
	if (selectingDifficulty)
	{
	String string = botDifficulty == 0 ? "Easy" : (botDifficulty == 1 ? "Medium" : "Hard");
	g.setFont(new Font("Arial", 1, 30));
	g.drawString("<< Bot Difficulty: " + string + " >>", width / 2 - 180, height / 2 - 25);
	g.drawString("Press Space to Play", width / 2 - 150, height / 2 + 25);
	}
	if (gameStatus == 1)
	{
	g.setColor(Color.WHITE);
	g.setFont(new Font("Arial", 1, 50));
	g.drawString("PAUSED", width / 2 - 103, height / 2 - 25);
	}
	if (gameStatus == 1 || gameStatus == 2)
	{
	g.setColor(Color.WHITE);
	g.setStroke(new BasicStroke(5f));
	g.drawLine(width / 2, 0, width / 2, height);
	g.setStroke(new BasicStroke(2f));
	g.drawOval(width / 2 - 150, height / 2 - 150, 300, 300);
	g.setFont(new Font("Arial", 1, 50));
	g.drawString(String.valueOf(player1.score), width / 2 - 90, 50);
	g.drawString(String.valueOf(player2.score), width / 2 + 65, 50);
	player1.render(g);
	player2.render(g);
	ball.render(g);
	}
	if (gameStatus == 3)
	{
	g.setColor(Color.WHITE);
	g.setFont(new Font("Arial", 1, 50));
	g.drawString("PONG", width / 2 - 75, 50);
	if (bot && playerWon == 2)
	{
	g.drawString("The Bot Wins!", width / 2 - 170, 200);
	}
	else
	{
	g.drawString("Player " + playerWon + " Wins!", width / 2 - 165, 200);
	}
	g.setFont(new Font("Arial", 1, 30));
	g.drawString("Press Space to Play Again", width / 2 - 185, height / 2 - 25);
	g.drawString("Press ESC for Menu", width / 2 - 140, height / 2 + 25);
	}
	}
	@Override
	public void actionPerformed(ActionEvent e)
	{
	if (gameStatus == 2)
	{
	update();
	}
	renderer.repaint();
	}
	public static void main(String[] args)
	{
	pong = new Pong();
	}
	@Override
	public void keyPressed(KeyEvent e)
	{
	int id = e.getKeyCode();
	if (id == KeyEvent.VK_W)
	{
	w = true;
	}
	else if (id == KeyEvent.VK_S)
	{
	s = true;
	}
	else if (id == KeyEvent.VK_UP)
	{
	up = true;
	}
	else if (id == KeyEvent.VK_DOWN)
	{
	down = true;
	}
	else if (id == KeyEvent.VK_RIGHT)
	{
	if (selectingDifficulty)
	{
	if (botDifficulty < 2)
	{
	botDifficulty++;
	}
	else
	{
	botDifficulty = 0;
	}
	}
	else if (gameStatus == 0)
	{
	scoreLimit++;
	}
	}
	else if (id == KeyEvent.VK_LEFT)
	{
	if (selectingDifficulty)
	{
	if (botDifficulty > 0)
	{
	botDifficulty--;
	}
	else
	{
	botDifficulty = 2;
	}
	}
	else if (gameStatus == 0 && scoreLimit > 1)
	{
	scoreLimit--;
	}
	}
	else if (id == KeyEvent.VK_ESCAPE && (gameStatus == 2 || gameStatus == 3))
	{
	gameStatus = 0;
	}
	else if (id == KeyEvent.VK_SHIFT && gameStatus == 0)
	{
	bot = true;
	selectingDifficulty = true;
	}
	else if (id == KeyEvent.VK_SPACE)
	{
	if (gameStatus == 0 || gameStatus == 3)
	{
	if (!selectingDifficulty)
	{
	bot = false;
	}
	else
	{
	selectingDifficulty = false;
	}
	start();
	}
	else if (gameStatus == 1)
	{
	gameStatus = 2;
	}
	else if (gameStatus == 2)
	{
	gameStatus = 1;
	}
	}
	}
	@Override
	public void keyReleased(KeyEvent e)
	{
	int id = e.getKeyCode();
	if (id == KeyEvent.VK_W)
	{
	w = false;
	}
	else if (id == KeyEvent.VK_S)
	{
	s = false;
	}
	else if (id == KeyEvent.VK_UP)
	{
	up = false;
	}
	else if (id == KeyEvent.VK_DOWN)
	{
	down = false;
	}
	}
	@Override
	public void keyTyped(KeyEvent e)
	{
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

Ball.java

	import java.awt.Color;
	import java.awt.Graphics;
	import java.util.Random;
	public class Ball
	{
	public int x, y, width = 25, height = 25;
	public int motionX, motionY;
	public Random random;
	private Pong pong;
	public int amountOfHits;
	public Ball(Pong pong)
	{
	this.pong = pong;
	this.random = new Random();
	spawn();
	}
	public void update(Paddle paddle1, Paddle paddle2)
	{
	int speed = 5;
	this.x += motionX * speed;
	this.y += motionY * speed;
	if (this.y + height - motionY > pong.height || this.y + motionY < 0)
	{
	if (this.motionY < 0)
	{
	this.y = 0;
	this.motionY = random.nextInt(4);
	if (motionY == 0)
	{
	motionY = 1;
	}
	}
	else
	{
	this.motionY = -random.nextInt(4);
	this.y = pong.height - height;
	if (motionY == 0)
	{
	motionY = -1;
	}
	}
	}
	if (checkCollision(paddle1) == 1)
	{
	this.motionX = 1 + (amountOfHits / 5);
	this.motionY = -2 + random.nextInt(4);
	if (motionY == 0)
	{
	motionY = 1;
	}
	amountOfHits++;
	}
	else if (checkCollision(paddle2) == 1)
	{
	this.motionX = -1 - (amountOfHits / 5);
	this.motionY = -2 + random.nextInt(4);
	if (motionY == 0)
	{
	motionY = 1;
	}
	amountOfHits++;
	}
	if (checkCollision(paddle1) == 2)
	{
	paddle2.score++;
	spawn();
	}
	else if (checkCollision(paddle2) == 2)
	{
	paddle1.score++;
	spawn();
	}
	}
	public void spawn()
	{
	this.amountOfHits = 0;
	this.x = pong.width / 2 - this.width / 2;
	this.y = pong.height / 2 - this.height / 2;
	this.motionY = -2 + random.nextInt(4);
	if (motionY == 0)
	{
	motionY = 1;
	}
	if (random.nextBoolean())
	{
	motionX = 1;
	}
	else
	{
	motionX = -1;
	}
	}
	public int checkCollision(Paddle paddle)
	{
	if (this.x < paddle.x + paddle.width && this.x + width > paddle.x && this.y < paddle.y + paddle.height && this.y + height > paddle.y)
	{
	return 1; //bounce
	}
	else if ((paddle.x > x && paddle.paddleNumber == 1) || (paddle.x < x - width && paddle.paddleNumber == 2))
	{
	return 2; //score
	}
	return 0; //nothing
	}
	public void render(Graphics g)
	{
	g.setColor(Color.WHITE);
	g.fillOval(x, y, width, height);
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

Paddle.java

	import java.awt.Color;
	import java.awt.Graphics;
	public class Paddle
	{
	public int paddleNumber;
	public int x, y, width = 50, height = 250;
	public int score;
	public Paddle(Pong pong, int paddleNumber)
	{
	this.paddleNumber = paddleNumber;
	if (paddleNumber == 1)
	{
	this.x = 0;
	}
	if (paddleNumber == 2)
	{
	this.x = pong.width - width;
	}
	this.y = pong.height / 2 - this.height / 2;
	}
	public void render(Graphics g)
	{
	g.setColor(Color.WHITE);
	g.fillRect(x, y, width, height);
	}
	public void move(boolean up)
	{
	int speed = 15;
	if (up)
	{
	if (y - speed > 0)
	{
	y -= speed;
	}
	else
	{
	y = 0;
	}
	}
	else
	{
	if (y + height + speed < Pong.pong.height)
	{
	y += speed;
	}
	else
	{
	y = Pong.pong.height - height;
	}
	}
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

Renderer.java

	import java.awt.Graphics;
	import java.awt.Graphics2D;
	import javax.swing.JPanel;
	public class Renderer extends JPanel
	{
	private static final long serialVersionUID = 1L;
	@Override
	protected void paintComponent(Graphics g)
	{
	super.paintComponent(g);
	Pong.pong.render((Graphics2D) g);
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

Output