java代码写一个贪吃蛇

好的，以下是一个简单的 Java 贪吃蛇游戏的代码:

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

public class Snake extends JFrame implements KeyListener, ActionListener {
    private JPanel panel;
    private JLabel score;
    private int delay = 100;
    private Timer timer;
    private int x[] = new int[100];
    private int y[] = new int[100];
    private int length = 3;
    private int appleX, appleY;
    private int direction = KeyEvent.VK_RIGHT;
    private ImageIcon imgSnake = new ImageIcon("snake.png");
    private ImageIcon imgHead = new ImageIcon("head.png");
    private ImageIcon imgApple = new ImageIcon("apple.png");

    public Snake() {
        setTitle("贪吃蛇");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(500, 500);
        setLocationRelativeTo(null);
        setResizable(false);

        panel = new JPanel();
        panel.setBackground(Color.white);
        panel.setLayout(null);
        setContentPane(panel);

        score = new JLabel("得分: 0");
        score.setBounds(10, 10, 100, 20);
        panel.add(score);

        for(int i = 0; i < length; i ++) {
            x[i] = 100 - i * 10;
            y[i] = 100;
        }

        newApple();

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

        addKeyListener(this);
        setVisible(true);
    }

    public void paint(Graphics g) {
        super.paint(g);

        imgApple.paintIcon(this, g, appleX, appleY);

        for(int i = 0; i < length; i ++) {
            if(i == 0) {
                imgHead.paintIcon(this, g, x[i], y[i]);
            } else {
                imgSnake.paintIcon(this, g, x[i], y[i]);
            }
        }
    }

    public void actionPerformed(ActionEvent e) {
        move();
        eat();
        checkCrash();
        repaint();
    }

    public void move() {
        for(int i = length; i > 0; i --) {
            x[i] = x[i - 1];
            y[i] = y[i - 1];
        }

        if(direction == KeyEvent.VK_LEFT) {
            x[0] -= 10;
        } else if(direction == KeyEvent.VK_RIGHT) {
            x[0] += 10;
        } else if(direction == KeyEvent.VK_UP) {
            y[0] -= 10;
        } else if(direction == KeyEvent.VK_DOWN) {
            y[0] += 10;
        }
    }

    public void eat() {
        if(x[0] == appleX && y[0] == appleY) {
            length ++;
            score.setText("得分: " + (length - 3) * 10);
            newApple();
        }
    }

    public void checkCrash() {
        if(x[0] < 0 || x[0] > 490 || y[0] < 0 || y[0] > 490) {
            gameOver();
        }

        for(int i = 1; i < length; i ++) {
            if(x[0] == x[i] && y[0] == y[i]) {
                gameOver();
            }
        }
    }

    public void newApple() {
        appleX = (int) (Math.random() * 49) * 10;
        appleY = (int) (Math.random() * 49) * 10;
    }

    public void gameOver() {
        timer.stop();
        JOptionPane.showMessageDialog(this, "游戏结束");
    }

    public void keyPressed(KeyEvent e) {
        int code = e.getKeyCode();

        if((code == KeyEvent.VK_LEFT || code == KeyEvent.VK_RIGHT || code == KeyEvent.VK_UP || code == KeyEvent.VK_DOWN) && Math.abs(code - direction) != 2) {
            direction = code;
        }
    }

    public void keyTyped(KeyEvent e) {}
    public void keyReleased(KeyEvent e) {}
    
    public static void main(String[] args) {
        new Snake();
    }
}

注意: 上述代码需要三张图片文件作为素材，分别是蛇身、蛇头和苹果图，可以根据实际需要自行调整。