Java游戏开发基础：从零开始制作一个简单的2D游戏

import javax.swing.*;
public class Game {
    private static final int WIDTH = 800;  // 游戏窗口宽度
    private static final int HEIGHT = 600; // 游戏窗口高度
    public static void main(String[] args) {
        JFrame frame = new JFrame("简单的2D游戏");
        GamePanel panel = new GamePanel();
        frame.setSize(WIDTH, HEIGHT);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(panel);
        frame.setVisible(true);
        panel.startGame(); // 启动游戏
    }
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
public class GamePanel extends JPanel implements ActionListener, KeyListener {
    private Timer timer;
    private Player player;
    private ArrayList<Obstacle> obstacles;
    private int score;
    public GamePanel() {
        this.setPreferredSize(new Dimension(800, 600));
        this.setBackground(Color.BLACK);
        this.setFocusable(true);
        this.addKeyListener(this);
        player = new Player(400, 500);
        obstacles = new ArrayList<>();
        score = 0;
    }
    public void startGame() {
        timer = new Timer(1000 / 60, this);  // 每秒60帧
        timer.start();
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        updateGame();
        repaint();
    }
    private void updateGame() {
        player.update();
        for (Obstacle obstacle : obstacles) {
            obstacle.update();
            if (obstacle.getBounds().intersects(player.getBounds())) {
                // 游戏结束逻辑
                timer.stop();
                JOptionPane.showMessageDialog(this, "Game Over! Your score: " + score);
                System.exit(0);
            }
        }
        score++;
        // 添加新的障碍物
        if (Math.random() < 0.02) {
            obstacles.add(new Obstacle((int) (Math.random() * 750), 0));
        }
        // 移除超出屏幕的障碍物
        obstacles.removeIf(obstacle -> obstacle.getY() > 600);
    }
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        player.draw(g);
        for (Obstacle obstacle : obstacles) {
            obstacle.draw(g);
        }
        g.setColor(Color.WHITE);
        g.drawString("Score: " + score, 20, 20);
    }
    // 键盘事件：左右移动玩家
    @Override
    public void keyPressed(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.VK_LEFT) {
            player.moveLeft();
        } else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
            player.moveRight();
        }
    }
    @Override
    public void keyReleased(KeyEvent e) {}
    @Override
    public void keyTyped(KeyEvent e) {}
}

import java.awt.*;
public class Player {
    private int x, y;
    private final int width = 50;
    private final int height = 50;
    public Player(int x, int y) {
        this.x = x;
        this.y = y;
    }
    public void update() {
        // 玩家每次更新时处理移动逻辑
    }
    public void moveLeft() {
        if (x > 0) x -= 10;
    }
    public void moveRight() {
        if (x < 750) x += 10;
    }
    public void draw(Graphics g) {
        g.setColor(Color.RED);
        g.fillOval(x, y, width, height);
    }
    public Rectangle getBounds() {
        return new Rectangle(x, y, width, height);
    }
}

import java.awt.*;
public class Obstacle {
    private int x, y;
    private final int width = 50;
    private final int height = 50;
    public Obstacle(int x, int y) {
        this.x = x;
        this.y = y;
    }
    public void update() {
        y += 5;  // 每帧下降的速度
    }
    public void draw(Graphics g) {
        g.setColor(Color.GREEN);
        g.fillRect(x, y, width, height);
    }
    public Rectangle getBounds() {
        return new Rectangle(x, y, width, height);
    }
}