前言

该游戏可支持本地两人游戏

Player1采用W和S键控制球拍移动

Player2采用UP和DOWN键控制球拍移动

进程开始后按Space键即可开始游戏

在任意玩家得分后游戏会暂停，按下Space键后即可继续游戏

在达到设定的Score-to-win便会弹出GameOver窗口

代码实现

GameOverPanel类

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
import javax.swing.*;
import java.awt.*;class GameOverPanel extends JPanel {private static final long serialVersionUID = 1L;private BufferedImage image;public GameOverPanel(int player1Score, int player2Score) {this.player1Score = player1Score;this.player2Score = player2Score;try {// Load the image fileimage = ImageIO.read(new File("C:/Users/timberman/Desktop/JianRan.jpg"));} catch (Exception e) {e.printStackTrace();}}public void paintComponent(Graphics g) {super.paintComponent(g);// Draw the image in the center of the panelint x = (getWidth() - image.getWidth()) / 2;int y = (getHeight() - image.getHeight()) / 2;g.drawImage(image, x, y, null);}private int player1Score;private int player2Score;public void paint(Graphics g) {super.paint(g);Font font = new Font("Arial", Font.BOLD, 20);g.setFont(font);g.drawString("Game Over", 30, 30);if(player1Score>player2Score){g.drawString("player1 Win",30,50);}else{g.drawString("player2 Win",30,50);}}
}

PingPong类

import java.awt.*;
import java.awt.font.FontRenderContext;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Set;
import java.util.HashSet;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.swing.*;public class PingPong extends JPanel implements KeyListener, Runnable {private static final long serialVersionUID = 1L;private Set<Integer> keysPressed = new HashSet<>();private int paddle1Y = 0;private int paddle2Y = 0;private int ballXDirection = 1;private int ballYDirection = -1;private int player1Score = 0;private int player2Score = 0;private boolean gameRunning = true;private final int BALL_SIZE = 20;private final int PADDLE_WIDTH = 10;private final int PADDLE_HEIGHT = 100;private final int PADDLE_SPEED = 10;private final int SCORE_TO_WIN = 11;private final int FRAME_WIDTH = 600;private final int FRAME_HEIGHT = 600;private final int PADDING = 10;private final int BALL_SPEED = 1;private final int DELAY = 10;private int ballX = FRAME_WIDTH / 2 - BALL_SIZE / 2;;private int ballY = FRAME_HEIGHT / 2 - BALL_SIZE / 2;public boolean startScreen=true;public PingPong() {JFrame frame = new JFrame("Ping Pong");frame.setSize(FRAME_WIDTH+15, FRAME_HEIGHT+35);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.addKeyListener(this);frame.add(this);frame.setVisible(true);frame.setLocation(500,100);new Thread(this).start();}public void paint(Graphics g) {super.paint(g);g.setColor(Color.BLACK);g.fillRect(0, 0, FRAME_WIDTH, FRAME_HEIGHT);if (startScreen) {// Draw start screen messageg.setColor(Color.white);Font font = new Font("Arial", Font.BOLD, 36);g.setFont(font);g.drawString("Press SPACE to start", FRAME_WIDTH/2 -190, FRAME_HEIGHT/2);}else{g.setColor(Color.WHITE);g.fillRect(PADDING, paddle1Y, PADDLE_WIDTH, PADDLE_HEIGHT);g.fillRect(FRAME_WIDTH - PADDING - PADDLE_WIDTH, paddle2Y, PADDLE_WIDTH, PADDLE_HEIGHT);g.fillOval(ballX, ballY, BALL_SIZE, BALL_SIZE);Font font = new Font("Arial", Font.BOLD, 20);g.setFont(font);g.drawString("Player 1: " + player1Score, PADDING, PADDING+10);g.drawString("Player 2: " + player2Score, FRAME_WIDTH - PADDING - 100, PADDING+10);}}public void run() {while (gameRunning) {if (startScreen) {// Draw start screen messageGraphics g = getGraphics();g.setColor(Color.white);g.drawString("Press SPACE to start", FRAME_WIDTH/2 - 70, FRAME_HEIGHT/2);g.dispose();// Wait for spacebar to be pressedwhile (startScreen) {try {Thread.sleep(10);} catch (InterruptedException e) {e.printStackTrace();}}}moveBall();movePaddles();checkCollisions();checkWin();repaint();try {Thread.sleep(DELAY);} catch (InterruptedException e) {e.printStackTrace();}}}private void moveBall() {ballX += ballXDirection * BALL_SPEED;ballY += ballYDirection * BALL_SPEED;}@Overridepublic void keyTyped(KeyEvent e) {}public void keyPressed(KeyEvent e) {int keyCode = e.getKeyCode();keysPressed.add(keyCode);if (keysPressed.contains(KeyEvent.VK_SPACE)) {startScreen = false;}}public void keyReleased(KeyEvent e) {int keyCode = e.getKeyCode();keysPressed.remove(keyCode);}private void movePaddles() {if (keysPressed.contains(KeyEvent.VK_W)) {paddle1Y -= PADDLE_SPEED;}if (keysPressed.contains(KeyEvent.VK_S)) {paddle1Y += PADDLE_SPEED;}if (keysPressed.contains(KeyEvent.VK_UP)) {paddle2Y -= PADDLE_SPEED;}if (keysPressed.contains(KeyEvent.VK_DOWN)) {paddle2Y += PADDLE_SPEED;}// Clamp paddle positions to screen boundspaddle1Y = Math.max(PADDING, Math.min(paddle1Y, FRAME_HEIGHT - PADDLE_HEIGHT - PADDING));paddle2Y = Math.max(PADDING, Math.min(paddle2Y, FRAME_HEIGHT - PADDLE_HEIGHT - PADDING));}private void checkCollisions() {if (ballY <= 0 || ballY >= FRAME_HEIGHT - BALL_SIZE) {ballYDirection *= -1;}if (ballX <= PADDING + PADDLE_WIDTH && ballY >= paddle1Y && ballY <= paddle1Y + PADDLE_HEIGHT) {ballXDirection *= -1;ballXDirection += ballXDirection > 0 ? 1 : -1;ballYDirection += ballYDirection > 0 ? 1 : -1;}if (ballX >= FRAME_WIDTH - PADDING - PADDLE_WIDTH - BALL_SIZE && ballY >= paddle2Y && ballY <= paddle2Y + PADDLE_HEIGHT) {ballXDirection *= -1;ballXDirection += ballXDirection > 0 ? 1 : -1;ballYDirection += ballYDirection > 0 ? 1 : -1;}if (ballX <= 0) {player2Score++;resetBall();gameRunning = false;}if (ballX >= FRAME_WIDTH - BALL_SIZE) {player1Score++;resetBall();gameRunning = false;}if (player1Score >= SCORE_TO_WIN || player2Score >= SCORE_TO_WIN) {gameRunning = false;}if (!gameRunning) {// Draw scoresGraphics g = getGraphics();g.setColor(Color.white);Font font = new Font("Arial", Font.BOLD, 36);g.setFont(font);String scoreString = "Player 1: " + player1Score + "   Player 2: " + player2Score;int stringWidth = g.getFontMetrics().stringWidth(scoreString);g.drawString(scoreString, FRAME_WIDTH/2 - stringWidth/2, FRAME_HEIGHT/2);g.drawString("Press SPACE to continue",FRAME_WIDTH/2 - stringWidth/2-10, FRAME_HEIGHT/2-100);// Wait for space bar to be pressedwhile (!keysPressed.contains(KeyEvent.VK_SPACE)) {try {Thread.sleep(10);} catch (InterruptedException e) {e.printStackTrace();}}// Reset game and continuekeysPressed.remove(KeyEvent.VK_SPACE);gameRunning = true;}}private void checkWin() {if (player1Score >= SCORE_TO_WIN || player2Score >= SCORE_TO_WIN) {gameRunning = false;JFrame frame = new JFrame("Game Over");frame.setSize(300, 300);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.add(new GameOverPanel(player1Score, player2Score));frame.setVisible(true);frame.setLocation(400,300);}}private void resetBall() {ballX = FRAME_WIDTH / 2 - BALL_SIZE / 2;ballY = FRAME_HEIGHT / 2 - BALL_SIZE / 2;ballXDirection = new Random().nextInt(2) == 0 ? -1 : 1;ballYDirection = new Random().nextInt(2) == 0 ? -1 : 1;}public static void main(String[] args) {new PingPong();}
}

实机演示

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JAVA练习小游戏——本地双人联机乒乓球小游戏

前言

代码实现

GameOverPanel类

PingPong类

实机演示

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