用java eclipse编写一个贪吃蛇小游戏

好的，下面是一个简单的Java Eclipse编写的贪吃蛇小游戏：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.LinkedList;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class SnakeGame extends JPanel implements Runnable, KeyListener {
    private static final long serialVersionUID = 1L;
    private static final int WIDTH = 500;
    private static final int HEIGHT = 500;
    private static final int DOT_SIZE = 10;
    private static final int ALL_DOTS = 900;
    private static final int RAND_POS = 29;
    private static final int DELAY = 140;

    private boolean leftDirection = false;
    private boolean rightDirection = true;
    private boolean upDirection = false;
    private boolean downDirection = false;
    private boolean inGame = true;

    private int[] x = new int[ALL_DOTS];
    private int[] y = new int[ALL_DOTS];

    private int dots;
    private int apple_x;
    private int apple_y;
    private int score = 0;

    private Thread gameThread;
    private Random random;
    
    public SnakeGame() {
        setBackground(Color.black);
        setPreferredSize(new Dimension(WIDTH, HEIGHT));
        setFocusable(true);
        addKeyListener(this);
        initGame();
    }
    
    private void initGame() {
        dots = 3;
        for (int i = 0; i < dots; i++) {
            x[i] = 50 - i * DOT_SIZE;
            y[i] = 50;
        }
        random = new Random();
        locateApple();
        gameThread = new Thread(this);
        gameThread.start();
    }
    
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        doDrawing(g);
    }

    private void doDrawing(Graphics g) {
        if (inGame) {
            g.setColor(Color.red);
            g.fillOval(apple_x, apple_y, DOT_SIZE, DOT_SIZE);
            for (int i = 0; i < dots; i++) {
                if (i == 0) {
                    g.setColor(Color.green);
                } else {
                    g.setColor(Color.yellow);
                }
                g.fillRect(x[i], y[i], DOT_SIZE, DOT_SIZE);
            }
            g.setColor(Color.white);
            g.drawString("Score: " + score, 10, 20);
        } else {
            gameOver(g);
        }
    }

    private void gameOver(Graphics g) {
        String msg = "Game Over";
        g.setColor(Color.white);
        g.drawString(msg, (WIDTH - g.getFontMetrics().stringWidth(msg)) / 2, HEIGHT / 2);
    }

    private void checkApple() {
        if ((x[0] == apple_x) && (y[0] == apple_y)) {
            dots++;
            score++;
            locateApple();
        }
    }

    private void move() {
        for (int i = dots; i > 0; i--) {
            x[i] = x[(i - 1)];
            y[i] = y[(i - 1)];
        }
        if (leftDirection) {
            x[0] -= DOT_SIZE;
        }
        if (rightDirection) {
            x[0] += DOT_SIZE;
        }
        if (upDirection) {
            y[0] -= DOT_SIZE;
        }
        if (downDirection) {
            y[0] += DOT_SIZE;
        }
    }

    private void checkCollision() {
        for (int i = dots; i > 0; i--) {
            if ((i > 4) && (x[0] == x[i]) && (y[0] == y[i])) {
                inGame = false;
            }
        }
        if (y[0] >= HEIGHT) {
            inGame = false;
        }
        if (y[0] < 0) {
            inGame = false;
        }
        if (x[0] >= WIDTH) {
            inGame = false;
        }
        if (x[0] < 0) {
            inGame = false;
        }
        if (!inGame) {
            gameThread.interrupt();
        }
    }

    private void locateApple() {
        int r = random.nextInt(RAND_POS);
        apple_x = r * DOT_SIZE;
        r = random.nextInt(RAND_POS);
        apple_y = r * DOT_SIZE;
    }

    @Override
    public void run() {
        while (inGame) {
            checkApple();
            checkCollision();
            move();
            try {
                Thread.sleep(DELAY);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            repaint();
        }
    }
    
    @Override
    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;
        }
    }
    
    @Override
    public void keyReleased(KeyEvent e) {}
    
    @Override
    public void keyTyped(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 SnakeGame());
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

这个代码包含了游戏的主要逻辑，包括蛇的移动、吃苹果等等。你可以将这个代码复制到Eclipse中运行，进行测试。