请用java写一段通吃蛇游戏代码

好的，以下是一段简单的通吃蛇游戏代码（注释已添加）：

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

public class SnakeGame extends JPanel implements KeyListener, ActionListener {
    // 游戏区域大小
    private static final int WIDTH = 400;
    private static final int HEIGHT = 400;
    // 蛇的初始坐标和长度
    private int snakeX[] = new int[600];
    private int snakeY[] = new int[600];
    private int length = 3;
    // 食物的坐标
    private int foodX;
    private int foodY;
    // 蛇的当前移动方向
    private String direction = "Right";
    // 游戏是否结束
    private boolean isGameOver = false;
    // 定时器，控制蛇的移动速度
    private Timer timer = new Timer(150, this);

    public SnakeGame() {
        // 设置游戏区域大小
        setPreferredSize(new Dimension(WIDTH, HEIGHT));
        // 初始化蛇的初始位置
        snakeX[0] = 100;
        snakeY[0] = 100;
        snakeX[1] = 75;
        snakeY[1] = 100;
        snakeX[2] = 50;
        snakeY[2] = 100;
        // 随机初始化第一个食物
        generateFood();
        // 添加键盘监听器
        addKeyListener(this);
        setFocusable(true);
        setFocusTraversalKeysEnabled(false);
        // 开始定时器
        timer.start();
    }

    private void generateFood() {
        // 随机生成食物的位置，确保不与蛇的位置重叠
        foodX = (int)(Math.random() * ((WIDTH - 10) / 10)) * 10 + 5;
        foodY = (int)(Math.random() * ((HEIGHT - 10) / 10)) * 10 + 5;
        for (int i = 0; i < length; i++) {
            if (foodX == snakeX[i] && foodY == snakeY[i]) {
                generateFood();
                break;
            }
        }
    }

    private void move() {
        // 根据当前方向移动蛇头
        if (direction.equals("Right")) {
            snakeX[0] += 10;
        } else if (direction.equals("Left")) {
            snakeX[0] -= 10;
        } else if (direction.equals("Up")) {
            snakeY[0] -= 10;
        } else if (direction.equals("Down")) {
            snakeY[0] += 10;
        }
        // 检查蛇是否吃到了食物
        if (snakeX[0] == foodX && snakeY[0] == foodY) {
            length++;
            generateFood();
        }
        // 更新蛇的身体位置
        for (int i = length - 1; i > 0; i--) {
            snakeX[i] = snakeX[i - 1];
            snakeY[i] = snakeY[i - 1];
        }
        // 检查蛇是否碰到了墙或自己的身体
        if (snakeX[0] < 5 || snakeX[0] >= WIDTH - 5 || snakeY[0] < 5 || snakeY[0] >= HEIGHT - 5) {
            isGameOver = true;
        }
        for (int i = 1; i < length; i++) {
            if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) {
                isGameOver = true;
                break;
            }
        }
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        // 绘制游戏区域
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, WIDTH, HEIGHT);
        g.setColor(Color.BLACK);
        g.drawRect(0, 0, WIDTH - 1, HEIGHT - 1);
        // 绘制蛇头
        g.setColor(Color.GREEN);
        g.fillRect(snakeX[0], snakeY[0], 10, 10);
        // 绘制蛇的身体
        g.setColor(Color.BLACK);
        for (int i = 1; i < length; i++) {
            g.fillRect(snakeX[i], snakeY[i], 10, 10);
        }
        // 绘制食物
        g.setColor(Color.RED);
        g.fillRect(foodX, foodY, 10, 10);
        // 绘制游戏结束提示
        if (isGameOver) {
            g.setColor(Color.BLACK);
            g.setFont(new Font("Arial", Font.BOLD, 24));
            g.drawString("Game Over", 150, 200);
        }
    }

    @Override
    public void keyPressed(KeyEvent e) {
        // 键盘按键监听器
        int key = e.getKeyCode();
        if ((key == KeyEvent.VK_LEFT || key == KeyEvent.VK_A) && !direction.equals("Right")) {
            direction = "Left";
        } else if ((key == KeyEvent.VK_RIGHT || key == KeyEvent.VK_D) && !direction.equals("Left")) {
            direction = "Right";
        } else if ((key == KeyEvent.VK_UP || key == KeyEvent.VK_W) && !direction.equals("Down")) {
            direction = "Up";
        } else if ((key == KeyEvent.VK_DOWN || key == KeyEvent.VK_S) && !direction.equals("Up")) {
            direction = "Down";
        }
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // 定时器监听器，每次移动蛇并重绘游戏区域
        if (!isGameOver) {
            move();
        }
        repaint();
    }

    public static void main(String[] args) {
        // 创建游戏窗口
        JFrame frame = new JFrame("Snake Game");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(false);
        frame.add(new SnakeGame(), BorderLayout.CENTER);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    @Override
    public void keyTyped(KeyEvent e) {}

    @Override
    public void keyReleased(KeyEvent e) {}
}

希望能够帮助到你！