用java代码写一个飞机大战

好的，以下是一个简单的飞机大战的Java代码：

import java.awt.*;  
import java.awt.event.*;  
import java.awt.image.*;  
import java.io.*;  
import javax.imageio.*;  
import javax.swing.*;  

public class PlaneWar extends JFrame {  
    private int frameWidth = 400;  
    private int frameHeight = 650;  
    private int score = 0; // 得分  
    private BufferedImage background; // 背景图片  
    private BufferedImage bulletImage; // 子弹图片  
    private BufferedImage enemyImage; // 敌机图片  
    private BufferedImage heroImage; // 英雄机图片  
    private MyPanel myPanel; // 游戏面板  

    public static void main(String[] args) {  
        new PlaneWar();  
    }  

    public PlaneWar() {  
        try {  
            background = ImageIO.read(new File("background.png"));  
            bulletImage = ImageIO.read(new File("bullet.png"));  
            enemyImage = ImageIO.read(new File("enemy.png"));  
            heroImage = ImageIO.read(new File("hero.png"));  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  

        myPanel = new MyPanel();  
        this.add(myPanel);  
        this.setTitle("Plane War");  
        this.setSize(frameWidth, frameHeight);  
        this.setLocationRelativeTo(null);  
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
        this.setVisible(true);  
    }  

    class MyPanel extends JPanel implements Runnable {  
        private int heroX = 160; // 英雄机的横坐标  
        private int heroY = 500; // 英雄机的纵坐标  
        private int bulletX = -10; // 子弹的横坐标  
        private int bulletY = -10; // 子弹的纵坐标  
        private int enemyX = (int) (Math.random() * 300); // 敌机的横坐标  
        private int enemyY = 0; // 敌机的纵坐标  
        private int enemySpeed = 1; // 敌机的速度  
        private boolean isHit = false; // 是否击中敌机  
        private boolean isOver = false; // 是否结束游戏  

        public MyPanel() {  
            this.setFocusable(true);  
            this.requestFocusInWindow();  
            this.addKeyListener(new KeyAdapter() {  
                public void keyPressed(KeyEvent e) {  
                    switch (e.getKeyCode()) {  
                    case KeyEvent.VK_LEFT:  
                        if (heroX >= 10) {  
                            heroX -= 10;  
                        }  
                        break;  
                    case KeyEvent.VK_RIGHT:  
                        if (heroX <= 310) {  
                            heroX += 10;  
                        }  
                        break;  
                    case KeyEvent.VK_SPACE:  
                        if (bulletY <= 0) {  
                            bulletX = heroX + 30;  
                            bulletY = heroY - 20;  
                        }  
                        break;  
                    }  
                }  
            });  
        }  

        public void paint(Graphics g) {  
            g.drawImage(background, 0, 0, null);  

            if (!isOver) {  
                g.drawImage(heroImage, heroX, heroY, null);  

                if (bulletY > 0) {  
                    g.drawImage(bulletImage, bulletX, bulletY, null);  
                    bulletY -= 10;  
                }  

                if (!isHit) {  
                    g.drawImage(enemyImage, enemyX, enemyY, null);  
                    enemyY += enemySpeed;  
                    if (enemyY > 650) {  
                        enemyX = (int) (Math.random() * 300);  
                        enemyY = 0;  
                    }  
                }  

                if (bulletX >= enemyX && bulletX <= enemyX + 50 && bulletY >= enemyY && bulletY <= enemyY + 50) {  
                    score += 10;  
                    isHit = true;  
                    enemySpeed += 1;  
                }  

                if (enemyY >= heroY - 50 && enemyY <= heroY + 50 && enemyX >= heroX - 50 && enemyX <= heroX + 50) {  
                    isOver = true;  
                }  

                g.setColor(Color.WHITE);  
                g.drawString("Score: " + score, 10, 20);  
            } else {  
                g.setColor(Color.RED);  
                g.setFont(new Font("Arial", Font.BOLD, 30));  
                g.drawString("Game Over!", 120, 300);  
            }  
        }  

        public void run() {  
            while (true) {  
                try {  
                    Thread.sleep(10);  
                } catch (InterruptedException e) {  
                    e.printStackTrace();  
                }  
                this.repaint();  
            }  
        }  
    }  
}

这个游戏中，玩家可以通过方向键控制英雄机的移动，按下空格键发射子弹。敌机从上方飞来，玩家需要尽可能地击落敌机并躲避敌机的攻击。游戏结束条件是敌机与英雄机相撞。