用java写一段贪吃蛇代码

好的，以下是一段简单的贪吃蛇代码，使用Java语言编写：

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

public class Snake extends JFrame implements KeyListener {
    private int width = 300;
    private int height = 300;
    private int x = 150;
    private int y = 150;
    private int size = 10;
    private int dx = 0;
    private int dy = 0;
    private Timer timer;
    private boolean gameOver = false;

    public Snake() {
        setTitle("Snake");
        setSize(width, height);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        addKeyListener(this);
        timer = new Timer(100, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                move();
                repaint();
            }
        });
        timer.start();
    }

    public void paint(Graphics g) {
        super.paint(g);
        if (!gameOver) {
            g.setColor(Color.GREEN);
            g.fillRect(x, y, size, size);
        } else {
            g.setColor(Color.RED);
            g.drawString("Game Over", 100, 150);
        }
    }

    public void keyPressed(KeyEvent e) {
        int key = e.getKeyCode();
        if (key == KeyEvent.VK_LEFT) {
            dx = -size;
            dy = 0;
        } else if (key == KeyEvent.VK_RIGHT) {
            dx = size;
            dy = 0;
        } else if (key == KeyEvent.VK_UP) {
            dx = 0;
            dy = -size;
        } else if (key == KeyEvent.VK_DOWN) {
            dx = 0;
            dy = size;
        }
    }

    public void keyReleased(KeyEvent e) {
    }

    public void keyTyped(KeyEvent e) {
    }

    public void move() {
        x += dx;
        y += dy;
        if (x < 0 || x >= width || y < 0 || y >= height) {
            gameOver = true;
            timer.stop();
        }
    }

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

这段代码实现了一个简单的贪吃蛇游戏，使用了Java的图形界面库Swing。玩家可以通过方向键控制蛇的移动方向，蛇会不断移动并吃掉食物，如果撞到墙壁或自己的身体，则游戏结束。