Java写一个贪吃蛇大作战

当然可以！下面是一个简单的Java代码示例，实现了一个基本的贪吃蛇大作战游戏：

import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class SnakeGame extends JFrame {

    private static final int WIDTH = 400;  // 游戏窗口宽度
    private static final int HEIGHT = 400; // 游戏窗口高度
    private static final int UNIT_SIZE = 20; // 单元格大小
    private static final int GAME_UNITS = (WIDTH * HEIGHT) / (UNIT_SIZE * UNIT_SIZE); // 单元格数量
    private static final int DELAY = 75; // 游戏速度

    private final List<Integer> snakeX; // 蛇身体的x坐标
    private final List<Integer> snakeY; // 蛇身体的y坐标
    private int foodX; // 食物的x坐标
    private int foodY; // 食物的y坐标
    private Dir direction = Dir.RIGHT; // 蛇的移动方向
    private boolean running = false; // 游戏是否正在运行
    private Timer timer; // 定时器

    public SnakeGame() {
        snakeX = new ArrayList<>();
        snakeY = new ArrayList<>();

        initGame();

        addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                int key = e.getKeyCode();
                if (key == KeyEvent.VK_LEFT && direction != Dir.RIGHT) {
                    direction = Dir.LEFT;
                } else if (key == KeyEvent.VK_RIGHT && direction != Dir.LEFT) {
                    direction = Dir.RIGHT;
                } else if (key == KeyEvent.VK_UP && direction != Dir.DOWN) {
                    direction = Dir.UP;
                } else if (key == KeyEvent.VK_DOWN && direction != Dir.UP) {
                    direction = Dir.DOWN;
                }
            }
        });
        setFocusable(true);
    }

    private void initGame() {
        snakeX.clear();
        snakeY.clear();

        snakeX.add(WIDTH / 2);
        snakeY.add(HEIGHT / 2);

        generateFood();

        running = true;
        timer = new Timer(DELAY, e -> gameLoop());
        timer.start();
    }

    private void generateFood() {
        Random random = new Random();
        foodX = random.nextInt((WIDTH / UNIT_SIZE)) * UNIT_SIZE;
        foodY = random.nextInt((HEIGHT / UNIT_SIZE)) * UNIT_SIZE;
    }

    private void gameLoop() {
        if (running) {
            move();
            checkCollision();
            repaint();
        }
    }

    private void move() {
        for (int i = snakeX.size() - 1; i > 0; i--) {
            snakeX.set(i, snakeX.get(i - 1));
            snakeY.set(i, snakeY.get(i - 1));
        }

        switch (direction) {
            case LEFT:
                snakeX.set(0, snakeX.get(0) - UNIT_SIZE);
                break;
            case RIGHT:
                snakeX.set(0, snakeX.get(0) + UNIT_SIZE);
                break;
            case UP:
                snakeY.set(0, snakeY.get(0) - UNIT_SIZE);
                break;
            case DOWN:
                snakeY.set(0, snakeY.get(0) + UNIT_SIZE);
                break;
        }
    }

    private void checkCollision() {
        // 检查是否撞到自己的身体
        for (int i = snakeX.size() - 1; i > 0; i--) {
            if (snakeX.get(0).equals(snakeX.get(i)) && snakeY.get(0).equals(snakeY.get(i))) {
                running = false;
            }
        }

        // 检查是否撞到边界
        if (snakeX.get(0) < 0 || snakeX.get(0) >= WIDTH || snakeY.get(0) < 0 || snakeY.get(0) >= HEIGHT) {
            running = false;
        }

        // 检查是否吃到食物
        if (snakeX.get(0).equals(foodX) && snakeY.get(0).equals(foodY)) {
            snakeX.add(foodX);
            snakeY.add(foodY);
            generateFood();
        }
    }

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

        // 绘制背景
        g.setColor(Color.BLACK);
        g.fillRect(0, 0, WIDTH, HEIGHT);

        // 绘制蛇头
        g.setColor(Color.GREEN);
        g.fillRect(snakeX.get(0), snakeY.get(0), UNIT_SIZE, UNIT_SIZE);

        // 绘制蛇身体
        g.setColor(Color.WHITE);
        for (int i = 1; i < snakeX.size(); i++) {
            g.fillRect(snakeX.get(i), snakeY.get(i), UNIT_SIZE, UNIT_SIZE);
        }

        // 绘制食物
        g.setColor(Color.RED);
        g.fillRect(foodX, foodY, UNIT_SIZE, UNIT_SIZE);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            SnakeGame game = new SnakeGame();
            game.setSize(WIDTH, HEIGHT);
            game.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            game.setTitle("贪吃蛇大作战");
            game.setResizable(false);
            game.setVisible(true);
        });
    }

    private enum Dir {
        LEFT,
        RIGHT,
        UP,
        DOWN
    }
}

这段代码使用了Java的Swing库来创建窗口和处理绘图，利用定时器来更新游戏状态。通过键盘监听器来控制蛇的移动方向，通过碰撞检测判断游戏是否结束，并且随机生成食物。

希望这个示例能满足你的需求，如果有任何问题，请随时提问！