输出一段java贪吃蛇代码

当然可以！以下是简单的Java贪吃蛇代码：

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

public class Snake extends JPanel implements Runnable, KeyListener {
    private Thread thread;
    private boolean running;
    private int score;
    private int[] snakeX = new int[700];
    private int[] snakeY = new int[700];
    private int lengthOfSnake = 3;
    private int appleX;
    private int appleY;
    private boolean leftDirection = false;
    private boolean rightDirection = true;
    private boolean upDirection = false;
    private boolean downDirection = false;

    public Snake() {
        addKeyListener(this);
        setFocusable(true);
        setPreferredSize(new Dimension(500,500));
        initGame();
    }

    public void initGame() {
        running = true;
        score = 0;
        lengthOfSnake = 3;
        leftDirection = false;
        rightDirection = true;
        upDirection = false;
        downDirection = false;
        for (int i = 0; i < lengthOfSnake; i++) {
            snakeX[i] = 50 - i*10;
            snakeY[i] = 50;
        }
        newApple();
        if (thread == null) {
            thread = new Thread(this);
            thread.start();
        }
    }

    public void newApple() {
        appleX = (int) (Math.random() * 50) * 10;
        appleY = (int) (Math.random() * 50) * 10;
    }

    protected void paintComponent(Graphics graphics) {
        super.paintComponent(graphics);
        draw(graphics);
    }

    public void draw(Graphics graphics) {
        if (running) {
            graphics.setColor(Color.red);
            graphics.fillOval(appleX, appleY, 10, 10);

            for (int i = 0; i < lengthOfSnake; i++) {
                if (i == 0) {
                    graphics.setColor(Color.GRAY);
                    graphics.fillRect(snakeX[i], snakeY[i], 10, 10);
                }
                else {
                    graphics.setColor(Color.darkGray);
                    graphics.fillRect(snakeX[i], snakeY[i], 10, 10);
                }
            }
            graphics.setColor(Color.WHITE);
            graphics.drawString("Score: "+ score, 10, 20);
        } else {
            gameOver(graphics);
        }
    }

    public void move() {
        for (int i = lengthOfSnake; i > 0 ; i--) {
            snakeX[i] = snakeX[i-1];
            snakeY[i] = snakeY[i-1];
        }
        if (leftDirection) {
            snakeX[0] -= 10;
        }
        if (rightDirection) {
            snakeX[0] += 10;
        }
        if (upDirection) {
            snakeY[0] -= 10;
        }
        if (downDirection) {
            snakeY[0] += 10;
        }
    }

    public void checkApple() {
        if (snakeX[0] == appleX && snakeY[0] == appleY) {
            lengthOfSnake++;
            score++;
            newApple();
        }
    }

    public void checkCollisions() {
        for (int i = lengthOfSnake; i > 0 ; i--) {
            if (i > 4 && snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) {
                running = false;
            }
        }
        if (snakeX[0] < 0 || snakeX[0] > 490 || snakeY[0] < 0 || snakeY[0] > 490) {
            running = false;
        }
        if (!running) {
            thread = null;
        }
    }

    public void gameOver(Graphics graphics) {
        String message = "Game Over";
        Font font = new Font("Times New Roman", Font.BOLD, 30);
        FontMetrics metrics = getFontMetrics(font);

        graphics.setColor(Color.WHITE);
        graphics.setFont(font);
        graphics.drawString(message, (500 - metrics.stringWidth(message)) / 2, 250);
    }

    public void run() {
        while (running) {
            move();
            checkApple();
            checkCollisions();
            repaint();
            try {
                Thread.sleep(60);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

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

        if ((key == KeyEvent.VK_LEFT) && (!rightDirection)) {
            leftDirection = true;
            upDirection = false;
            downDirection = false;
        }

        if ((key == KeyEvent.VK_RIGHT) && (!leftDirection)) {
            rightDirection = true;
            upDirection = false;
            downDirection = false;
        }

        if ((key == KeyEvent.VK_UP) && (!downDirection)) {
            upDirection = true;
            rightDirection = false;
            leftDirection = false;
        }

        if ((key == KeyEvent.VK_DOWN) && (!upDirection)) {
            downDirection = true;
            rightDirection = false;
            leftDirection = false;
        }
    }

    public void keyTyped(KeyEvent e) {}

    public void keyReleased(KeyEvent e) {}

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

带有图形界面，可以通过方向键控制蛇的移动，得分与死亡判定等功能。