用eclipse写贪吃蛇游戏的代码

以下是使用 Java 语言在 Eclipse 中编写贪吃蛇游戏的简单代码：

import java.awt.Color;
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 Snake extends JPanel implements KeyListener, Runnable {

    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 = (WIDTH * HEIGHT) / (DOT_SIZE * DOT_SIZE);
    private static final int RAND_POS = WIDTH / DOT_SIZE;
    private static final int DELAY = 140;
    private LinkedList<Point> snake;
    private Point fruit;
    private boolean left = false;
    private boolean right = true;
    private boolean up = false;
    private boolean down = false;
    private boolean inGame = true;
    private Thread game;

    public Snake() {
        snake = new LinkedList<Point>();
        addKeyListener(this);
        setFocusable(true);
        setBackground(Color.BLACK);
        setPreferredSize(new Dimension(WIDTH, HEIGHT));
        initGame();
    }

    public void initGame() {
        snake.clear();
        snake.add(new Point(START_X, START_Y));
        generateFruit();
        left = false;
        right = true;
        up = false;
        down = false;
        inGame = true;
        game = new Thread(this);
        game.start();
    }

    public void generateFruit() {
        Random rand = new Random();
        int x = rand.nextInt(RAND_POS) * DOT_SIZE;
        int y = rand.nextInt(RAND_POS) * DOT_SIZE;
        fruit = new Point(x, y);
    }

    public void move() {
        Point head = snake.peekFirst();
        Point newHead = head;
        if (left) {
            newHead = new Point(head.x - DOT_SIZE, head.y);
        }
        if (right) {
            newHead = new Point(head.x + DOT_SIZE, head.y);
        }
        if (up) {
            newHead = new Point(head.x, head.y - DOT_SIZE);
        }
        if (down) {
            newHead = new Point(head.x, head.y + DOT_SIZE);
        }
        if (newHead.equals(fruit)) {
            snake.addFirst(newHead);
            generateFruit();
        } else if (newHead.x < 0 || newHead.x > WIDTH - DOT_SIZE || newHead.y < 0 || newHead.y > HEIGHT - DOT_SIZE
                || snake.contains(newHead)) {
            inGame = false;
        } else {
            snake.removeLast();
            snake.addFirst(newHead);
        }
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        if (inGame) {
            g.setColor(Color.RED);
            g.fillRect(fruit.x, fruit.y, DOT_SIZE, DOT_SIZE);
            g.setColor(Color.GREEN);
            for (Point p : snake) {
                g.fillRect(p.x, p.y, DOT_SIZE, DOT_SIZE);
            }
        } else {
            g.setColor(Color.WHITE);
            g.drawString("Game Over", 215, 240);
        }
    }

    @Override
    public void keyPressed(KeyEvent e) {
        int key = e.getKeyCode();
        if ((key == KeyEvent.VK_LEFT) && (!right)) {
            left = true;
            up = false;
            down = false;
        }
        if ((key == KeyEvent.VK_RIGHT) && (!left)) {
            right = true;
            up = false;
            down = false;
        }
        if ((key == KeyEvent.VK_UP) && (!down)) {
            up = true;
            right = false;
            left = false;
        }
        if ((key == KeyEvent.VK_DOWN) && (!up)) {
            down = true;
            right = false;
            left = false;
        }
    }

    @Override
    public void keyReleased(KeyEvent e) {

    }

    @Override
    public void keyTyped(KeyEvent e) {

    }

    @Override
    public void run() {
        while (inGame) {
            move();
            repaint();
            try {
                Thread.sleep(DELAY);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

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

}

这个代码包括游戏的核心逻辑和界面的绘制，可以在 Eclipse 中直接运行。其中，贪吃蛇的身体由链表 `LinkedList<Point>` 维护，蛇头和食物的位置由 `Point` 类表示。在 `move()` 方法中，根据当前蛇头的位置和方向计算出新的蛇头位置，并判断游戏是否结束。在 `paintComponent()` 方法中，根据游戏是否结束绘制相应的界面元素。在 `keyPressed()` 方法中，处理玩家的按键输入，更新蛇的移动方向。 `run()` 方法中，通过不断调用 `move()` 和 `repaint()` 方法来更新游戏状态和界面。最后，在 `main()` 方法中创建一个 JFrame 窗口，并将 Snake 对象添加到窗口中。