用Java语言编写贪吃蛇，用IntelliJ IDEA 软件编写，需要有开始和结束按钮

好的，下面是一个简单的Java贪吃蛇游戏实现，包含开始和结束按钮。我使用Java Swing库来实现界面，使用Java线程来控制蛇的移动和更新游戏界面。

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.Random;

public class SnakeGame extends JFrame implements ActionListener, KeyListener {
    private final int WIDTH = 500; // 游戏窗口宽度
    private final int HEIGHT = 500; // 游戏窗口高度
    private final int CELL_SIZE = 20; // 蛇身和食物大小
    private final int DELAY = 100; // 蛇移动延迟，单位: 毫秒
    private final Random random = new Random(); // 生成随机数
    private Timer timer; // 游戏计时器
    private boolean isRunning = false; // 游戏是否正在运行
    private boolean isGameOver = false; // 游戏是否结束
    private int score = 0; // 得分
    private Snake snake; // 蛇
    private Food food; // 食物
    private JButton startButton; // 开始按钮
    private JButton endButton; // 结束按钮
    private JLabel scoreLabel; // 显示得分的标签

    public SnakeGame() {
        setTitle("Java贪吃蛇游戏");
        setSize(WIDTH, HEIGHT);
        setLocationRelativeTo(null); // 窗口居中
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false); // 禁止调整窗口大小
        setLayout(null); // 使用绝对布局

        // 添加开始和结束按钮
        startButton = new JButton("开始");
        startButton.setBounds(180, 400, 80, 30);
        startButton.addActionListener(this);
        add(startButton);

        endButton = new JButton("结束");
        endButton.setBounds(240, 400, 80, 30);
        endButton.addActionListener(this);
        add(endButton);

        // 添加得分标签
        scoreLabel = new JLabel("得分: " + score);
        scoreLabel.setBounds(20, 20, 100, 30);
        add(scoreLabel);

        // 注册键盘监听器
        addKeyListener(this);

        setVisible(true);
    }

    // 开始游戏
    private void startGame() {
        isRunning = true;
        isGameOver = false;
        score = 0;
        scoreLabel.setText("得分: " + score);

        // 初始化蛇和食物
        snake = new Snake(WIDTH / 2, HEIGHT / 2, CELL_SIZE);
        food = new Food(random.nextInt(WIDTH / CELL_SIZE) * CELL_SIZE,
                random.nextInt(HEIGHT / CELL_SIZE) * CELL_SIZE, CELL_SIZE);

        // 启动计时器
        timer = new Timer(DELAY, this);
        timer.start();
    }

    // 结束游戏
    private void endGame() {
        isRunning = false;
        isGameOver = true;
        timer.stop();
        JOptionPane.showMessageDialog(this, "游戏结束，得分为：" + score);
    }

    // 更新游戏界面
    private void updateGame() {
        // 更新蛇的位置
        if (snake.move(food)) {
            // 如果蛇吃到了食物，则生成新的食物
            food = new Food(random.nextInt(WIDTH / CELL_SIZE) * CELL_SIZE,
                    random.nextInt(HEIGHT / CELL_SIZE) * CELL_SIZE, CELL_SIZE);
            score += 10;
            scoreLabel.setText("得分: " + score);
        }

        // 检查是否撞到墙或自己
        if (snake.isDead(WIDTH, HEIGHT)) {
            endGame();
        }

        // 更新游戏界面
        repaint();
    }

    // 绘制游戏界面
    @Override
    public void paint(Graphics g) {
        super.paint(g);

        // 绘制蛇和食物
        snake.draw(g);
        food.draw(g);
    }

    // 监听按钮事件和计时器事件
    @Override
    public void actionPerformed(ActionEvent e) {
        Object source = e.getSource();

        if (source == startButton) {
            if (!isRunning && isGameOver) {
                startGame();
            }
        } else if (source == endButton) {
            if (isRunning) {
                endGame();
            }
        } else if (source == timer) {
            if (isRunning) {
                updateGame();
            }
        }
    }

    // 监听键盘事件
    @Override
    public void keyPressed(KeyEvent e) {
        if (isRunning) {
            int keyCode = e.getKeyCode();

            switch (keyCode) {
                case KeyEvent.VK_UP:
                    snake.setDirection(Snake.Direction.UP);
                    break;
                case KeyEvent.VK_DOWN:
                    snake.setDirection(Snake.Direction.DOWN);
                    break;
                case KeyEvent.VK_LEFT:
                    snake.setDirection(Snake.Direction.LEFT);
                    break;
                case KeyEvent.VK_RIGHT:
                    snake.setDirection(Snake.Direction.RIGHT);
                    break;
            }
        }
    }

    @Override
    public void keyTyped(KeyEvent e) {}

    @Override
    public void keyReleased(KeyEvent e) {}

    // 蛇类
    private static class Snake {
        private ArrayList<Point> body; // 蛇身
        private int cellSize; // 蛇身大小
        private Direction direction; // 移动方向

        public Snake(int x, int y, int cellSize) {
            this.body = new ArrayList<>();
            this.body.add(new Point(x, y));
            this.cellSize = cellSize;
            this.direction = Direction.RIGHT;
        }

        // 设置移动方向
        public void setDirection(Direction direction) {
            if (this.direction == Direction.UP && direction == Direction.DOWN ||
                    this.direction == Direction.DOWN && direction == Direction.UP ||
                    this.direction == Direction.LEFT && direction == Direction.RIGHT ||
                    this.direction == Direction.RIGHT && direction == Direction.LEFT) {
                return;
            }
            this.direction = direction;
        }

        // 移动蛇
        public boolean move(Food food) {
            Point head = body.get(0);
            int x = head.x;
            int y = head.y;

            switch (direction) {
                case UP:
                    y -= cellSize;
                    break;
                case DOWN:
                    y += cellSize;
                    break;
                case LEFT:
                    x -= cellSize;
                    break;
                case RIGHT:
                    x += cellSize;
                    break;
            }

            Point newHead = new Point(x, y);

            // 检查是否吃到食物
            if (newHead.equals(food.getPosition())) {
                body.add(0, newHead);
                return true;
            }

            // 移动蛇身
            for (int i = body.size() - 1; i > 0; i--) {
                body.set(i, body.get(i - 1));
            }
            body.set(0, newHead);

            return false;
        }

        // 检查是否撞到墙或自己
        public boolean isDead(int width, int height) {
            Point head = body.get(0);

            if (head.x < 0 || head.x >= width || head.y < 0 || head.y >= height) {
                return true;
            }

            for (int i = 1; i < body.size(); i++) {
                if (head.equals(body.get(i))) {
                    return true;
                }
            }

            return false;
        }

        // 绘制蛇
        public void draw(Graphics g) {
            g.setColor(Color.GREEN);
            for (Point point : body) {
                g.fillRect(point.x, point.y, cellSize, cellSize);
            }
        }

        // 移动方向枚举类
        public enum Direction {
            UP, DOWN, LEFT, RIGHT
        }
    }

    // 食物类
    private static class Food {
        private Point position; // 食物位置
        private int cellSize; // 食物大小

        public Food(int x, int y, int cellSize) {
            this.position = new Point(x, y);
            this.cellSize = cellSize;
        }

        // 获取食物位置
        public Point getPosition() {
            return position;
        }

        // 绘制食物
        public void draw(Graphics g) {
            g.setColor(Color.RED);
            g.fillOval(position.x, position.y, cellSize, cellSize);
        }
    }

    public static void main(String[] args) {
        new SnakeGame();
    }
}