用java写一个打飞机小游戏

好的，以下是一个简单的打飞机小游戏的 Java 代码示例：

import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import javax.swing.*;

public class PlaneGame extends JFrame implements ActionListener {
    private Timer timer;
    private MyPlane myPlane;
    private ArrayList<EnemyPlane> enemyPlanes;
    private ArrayList<Bullet> bullets;
    private JLabel scoreLabel;
    private int score;

    public PlaneGame() {
        setTitle("打飞机小游戏");
        setSize(400, 600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel mainPanel = new JPanel(new BorderLayout());

        JPanel gamePanel = new JPanel();
        gamePanel.setPreferredSize(new Dimension(400, 500));
        gamePanel.setBackground(Color.WHITE);

        myPlane = new MyPlane(180, 450);
        enemyPlanes = new ArrayList<>();
        bullets = new ArrayList<>();

        scoreLabel = new JLabel("得分：0");
        mainPanel.add(scoreLabel, BorderLayout.NORTH);
        mainPanel.add(gamePanel, BorderLayout.CENTER);

        add(mainPanel);

        timer = new Timer(30, this);
        timer.start();

        addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_LEFT) {
                    myPlane.moveLeft();
                } else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
                    myPlane.moveRight();
                } else if (e.getKeyCode() == KeyEvent.VK_UP) {
                    myPlane.moveUp();
                } else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
                    myPlane.moveDown();
                } else if (e.getKeyCode() == KeyEvent.VK_SPACE) {
                    bullets.add(new Bullet(myPlane.getX() + 25, myPlane.getY()));
                }
            }
        });
    }

    public void actionPerformed(ActionEvent e) {
        scoreLabel.setText("得分：" + score);

        myPlane.update();

        for (int i = enemyPlanes.size() - 1; i >= 0; i--) {
            EnemyPlane enemyPlane = enemyPlanes.get(i);
            enemyPlane.update();
            if (enemyPlane.getY() > 500) {
                enemyPlanes.remove(i);
            } else if (myPlane.isCollide(enemyPlane)) {
                gameOver();
            }
        }

        for (int i = bullets.size() - 1; i >= 0; i--) {
            Bullet bullet = bullets.get(i);
            bullet.update();
            if (bullet.getY() < 0) {
                bullets.remove(i);
            } else {
                for (int j = enemyPlanes.size() - 1; j >= 0; j--) {
                    EnemyPlane enemyPlane = enemyPlanes.get(j);
                    if (bullet.isCollide(enemyPlane)) {
                        enemyPlanes.remove(j);
                        bullets.remove(i);
                        score += 10;
                        break;
                    }
                }
            }
        }

        if (Math.random() < 0.03) {
            int x = (int) (Math.random() * 350);
            enemyPlanes.add(new EnemyPlane(x, 0));
        }

        repaint();
    }

    protected void paintComponent(Graphics g) {
        super.paintComponents(g);

        myPlane.draw(g);

        for (Bullet bullet : bullets) {
            bullet.draw(g);
        }

        for (EnemyPlane enemyPlane : enemyPlanes) {
            enemyPlane.draw(g);
        }
    }

    private void gameOver() {
        timer.stop();
        JOptionPane.showMessageDialog(this, "得分：" + score, "游戏结束", JOptionPane.PLAIN_MESSAGE);
        System.exit(0);
    }

    public static void main(String[] args) {
        PlaneGame game = new PlaneGame();
        game.setVisible(true);
    }
}

class MyPlane {
    private int x, y;

    public MyPlane(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public void moveLeft() {
        x -= 10;
        if (x < 0) {
            x = 0;
        }
    }

    public void moveRight() {
        x += 10;
        if (x > 350) {
            x = 350;
        }
    }

    public void moveUp() {
        y -= 10;
        if (y < 0) {
            y = 0;
        }
    }

    public void moveDown() {
        y += 10;
        if (y > 450) {
            y = 450;
        }
    }

    public boolean isCollide(EnemyPlane enemyPlane) {
        int dx = x - enemyPlane.getX();
        int dy = y - enemyPlane.getY();
        int distance = (int) Math.sqrt(dx * dx + dy * dy);
        return distance < 30;
    }

    public void draw(Graphics g) {
        g.setColor(Color.RED);
        g.fillRect(x, y, 50, 50);
    }

    public void update() {
    }
}

class EnemyPlane {
    private int x, y;

    public EnemyPlane(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public void draw(Graphics g) {
        g.setColor(Color.BLUE);
        g.fillRect(x, y, 30, 30);
    }

    public void update() {
        y += 5;
    }
}

class Bullet {
    private int x, y;

    public Bullet(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public boolean isCollide(EnemyPlane enemyPlane) {
        int dx = x - enemyPlane.getX();
        int dy = y - enemyPlane.getY();
        int distance = (int) Math.sqrt(dx * dx + dy * dy);
        return distance < 15;
    }

    public void draw(Graphics g) {
        g.setColor(Color.BLACK);
        g.fillOval(x, y, 10, 10);
    }

    public void update() {
        y -= 10;
    }
}

您可以将此代码复制到 Java IDE 中进行运行和测试。