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Author: CodePearly

src/Games/Pong/Ball.java

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+package Games.Pong;
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+
+public class Ball {
+    private int x, y, xVelocity, yVelocity, diameter;
+
+    public Ball(int x, int y, int diameter) {
+        this.x = x;
+        this.y = y;
+        this.diameter = diameter;
+        this.xVelocity = 2;
+        this.yVelocity = 2;
+    }
+
+    public void move() {
+        x += xVelocity;
+        y += yVelocity;
+        
+        if (x <= 0 || x >= 780) {
+            xVelocity = -xVelocity;
+        }
+        if (y <= 0 || y >= 580) {
+            yVelocity = -yVelocity;
+        }
+    }
+
+    public void draw(Graphics g) {
+        g.setColor(Color.WHITE);
+        g.fillOval(x, y, diameter, diameter);
+    }
+
+    public void checkCollision(Paddle paddle) {
+        if (new Rectangle(x, y, diameter, diameter).intersects(paddle.getBounds())) {
+            xVelocity = -xVelocity;
+        }
+    }
+    public boolean isLeftOut() {
+    	return x <= 0;
+    }
+    public boolean isRightOut() {
+    	return x >= 780;
+    }
+    
+    }
+

src/Games/Pong/GamePanel.java

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+package Games.Pong;
+import javax.swing.JPanel;
+import java.awt.Graphics;
+import java.awt.Color;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+import javax.swing.Timer;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class GamePanel extends JPanel implements ActionListener {
+    private Ball ball;
+    private Paddle leftPaddle;
+    private Paddle rightPaddle;
+    private Timer timer;
+    private int leftScore = 0;
+    private int rightScore = 0;
+
+    public GamePanel() {
+        setBackground(Color.BLACK);
+        setFocusable(true);
+        addKeyListener(new KeyAdapter() {
+            @Override
+            public void keyPressed(KeyEvent e) {
+                leftPaddle.keyPressed(e);
+                rightPaddle.keyPressed(e);
+            }
+            @Override
+            public void keyReleased(KeyEvent e) {
+                leftPaddle.keyReleased(e);
+                rightPaddle.keyReleased(e);
+            }
+        });
+
+        ball = new Ball(400, 300, 20);
+        leftPaddle = new Paddle(30, 250, 10, 100, KeyEvent.VK_W, KeyEvent.VK_S);
+        rightPaddle = new Paddle(760, 250, 10, 100, KeyEvent.VK_UP, KeyEvent.VK_DOWN);
+
+        timer = new Timer(5, this);
+        timer.start();
+    }
+
+    @Override
+    protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        ball.draw(g);
+        leftPaddle.draw(g);
+        rightPaddle.draw(g);
+
+        g.setColor(Color.WHITE);
+        g.drawString("Score: " + leftScore, 100, 50);
+        g.drawString("Score: " + rightScore, 600, 50);
+    }
+
+    private void resetBall() {
+        ball = new Ball(400, 300, 20);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        ball.move();
+        if (ball.isLeftOut()) {
+            rightScore++;
+            resetBall();
+        } else if (ball.isRightOut()) {
+            leftScore++;
+            resetBall();
+        }
+        ball.checkCollision(leftPaddle);
+        ball.checkCollision(rightPaddle);
+        leftPaddle.move();
+        rightPaddle.move();
+        repaint();
+    }
+}

src/Games/Pong/Paddle.java

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+package Games.Pong;
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.event.KeyEvent;
+
+public class Paddle {
+    private int x, y, width, height, yVelocity;
+    private boolean upPressed, downPressed;
+    private int upKey, downKey;
+
+    public Paddle(int x, int y, int width, int height, int upKey, int downKey) {
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+        this.upKey = upKey;
+        this.downKey = downKey;
+    }
+
+    public void draw(Graphics g) {
+        g.setColor(Color.WHITE);
+        g.fillRect(x, y, width, height);
+    }
+
+    public Rectangle getBounds() {
+        return new Rectangle(x, y, width, height);
+    }
+
+    public void keyPressed(KeyEvent e) {
+        if (e.getKeyCode() == upKey) {
+            upPressed = true;
+        } else if (e.getKeyCode() == downKey) {
+            downPressed = true;
+        }
+    }
+
+    public void keyReleased(KeyEvent e) {
+        if (e.getKeyCode() == upKey) {
+            upPressed = false;
+        } else if (e.getKeyCode() == downKey) {
+            downPressed = false;
+        }
+    }
+
+    public void move() {
+        if (upPressed && y > 0) {
+            y -= 5;
+        }
+        if (downPressed && y < 500) {
+            y += 5;
+        }
+    }
+}

src/Games/Pong/PongGame.java

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+package Games.Pong;
+import java.awt.Toolkit;
+
+import javax.swing.JFrame;
+
+public class PongGame extends JFrame {
+    public PongGame() {
+        setTitle("Pong Game");
+        setSize(800, 640);
+        setIconImage(Toolkit.getDefaultToolkit().getImage(Games.Pong.PongGame.class.getResource("/Games/Pong/icon/PongIcon.png")));
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setLocationRelativeTo(null);
+
+        GamePanel panel = new GamePanel();
+        add(panel);
+    }
+
+    public static void main(String[] args) {
+        PongGame game = new PongGame();
+        game.setVisible(true);
+    }
+}