帮我用Java写一个吃豆人小游戏

好的，我可以给您提供一个简单的吃豆人小游戏的Java实现，但需要您明确一下您对游戏的要求和期望，例如游戏界面、游戏规则、游戏操作等。以下是一个简单的示例代码，您可以参考一下：

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.ArrayList;
import java.util.List;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class PacMan extends JPanel implements KeyListener {

    private static final long serialVersionUID = 1L;
    private static final int BLOCK_SIZE = 20;
    private static final int MARGIN_SIZE = 20;
    private static final int ROWS = 20;
    private static final int COLS = 20;
    private static final int PACMAN_SPEED = 3;
    private static final int GHOST_SPEED = 2;
    private static final int DELAY = 20;
    private static final int SCORE_DOT = 10;
    private static final int SCORE_GHOST = 50;
    private static final int SCORE_CHERRY = 100;
    private static final int CHERRY_INTERVAL = 20;
    
    private enum Direction {
        LEFT, UP, RIGHT, DOWN
    }

    private Point pacman;
    private Direction pacmanDirection;
    private List<Point> ghosts;
    private List<Direction> ghostDirections;
    private List<Point> dots;
    private int score;
    private int cherryCountdown;
    private boolean gameOver;
    private boolean gameWon;

    public PacMan() {
        pacman = new Point(ROWS / 2, COLS / 2);
        pacmanDirection = Direction.LEFT;
        ghosts = new ArrayList<>();
        ghostDirections = new ArrayList<>();
        for (int i = 0; i < 4; i++) {
            ghosts.add(new Point(ROWS / 2 + i, COLS / 2));
            ghostDirections.add(Direction.LEFT);
        }
        dots = new ArrayList<>();
        for (int i = 0; i < ROWS; i++) {
            for (int j = 0; j < COLS; j++) {
                if ((i == 0 || i == ROWS - 1 || j == 0 || j == COLS - 1) && (i != ROWS / 2 || j < COLS / 2 - 2 || j > COLS / 2 + 1)) {
                    dots.add(new Point(i, j));
                }
            }
        }
        score = 0;
        cherryCountdown = CHERRY_INTERVAL;
        gameOver = false;
        gameWon = false;
    }

    public void run() {
        JFrame frame = new JFrame("Pac-Man");
        frame.setSize(ROWS * BLOCK_SIZE + 2 * MARGIN_SIZE, COLS * BLOCK_SIZE + 2 * MARGIN_SIZE);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.addKeyListener(this);
        frame.getContentPane().add(this);
        frame.setVisible(true);
        while (!gameOver && !gameWon) {
            update();
            repaint();
            try {
                Thread.sleep(DELAY);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        if (gameOver) {
            System.out.println("Game over!");
        } else if (gameWon) {
            System.out.println("Congratulations, you won!");
        }
    }

    private void update() {
        movePacman();
        moveGhosts();
        checkCollisions();
        checkWinningCondition();
        updateCherryCountdown();
    }

    private void movePacman() {
        Point next = getNextPoint(pacman, pacmanDirection);
        if (dots.contains(next)) {
            dots.remove(next);
            score += SCORE_DOT;
        }
        if (cherryCountdown == 0 && next.equals(getRandomPoint())) {
            score += SCORE_CHERRY;
            cherryCountdown = CHERRY_INTERVAL;
        }
        if (!isWall(next)) {
            pacman = next;
        }
    }

    private void moveGhosts() {
        for (int i = 0; i < ghosts.size(); i++) {
            Point ghost = ghosts.get(i);
            Direction direction = ghostDirections.get(i);
            Point next = getNextPoint(ghost, direction);
            if (next.equals(pacman)) {
                gameOver = true;
                return;
            }
            if (isWall(next) || ghosts.contains(next)) {
                direction = getRandomDirection();
            }
            ghosts.set(i, getNextPoint(ghost, direction));
            ghostDirections.set(i, direction);
        }
    }

    private void checkCollisions() {
        for (Point ghost : ghosts) {
            if (ghost.equals(pacman)) {
                gameOver = true;
                return;
            }
        }
    }

    private void checkWinningCondition() {
        if (dots.isEmpty()) {
            gameWon = true;
        }
    }

    private void updateCherryCountdown() {
        cherryCountdown = Math.max(0, cherryCountdown - 1);
    }

    private Point getNextPoint(Point point, Direction direction) {
        switch (direction) {
            case LEFT:
                return new Point(point.x, point.y - 1);
            case UP:
                return new Point(point.x - 1, point.y);
            case RIGHT:
                return new Point(point.x, point.y + 1);
            case DOWN:
                return new Point(point.x + 1, point.y);
            default:
                return point;
        }
    }

    private boolean isWall(Point point) {
        return point.x < 0 || point.x >= ROWS || point.y < 0 || point.y >= COLS ||
               (point.x == ROWS / 2 && point.y >= COLS / 2 - 2 && point.y <= COLS / 2 + 1) ||
               (point.x == 0 && point.y == COLS / 2) || (point.x == ROWS - 1 && point.y == COLS / 2);
    }

    private Point getRandomPoint() {
        while (true) {
            Point point = new Point(new Random().nextInt(ROWS - 2) + 1, new Random().nextInt(COLS - 2) + 1);
            if (!isWall(point) && !dots.contains(point) && !ghosts.contains(point) && !point.equals(pacman)) {
                return point;
            }
        }
    }

    private Direction getRandomDirection() {
        Direction[] directions = Direction.values();
        return directions[new Random().nextInt(directions.length)];
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.setColor(Color.BLACK);
        g.fillRect(0, 0, getWidth(), getHeight());
        g.setColor(Color.WHITE);
        g.drawString("Score: " + score, MARGIN_SIZE, MARGIN_SIZE - 5);
        for (int i = 0; i < ROWS; i++) {
            for (int j = 0; j < COLS; j++) {
                if (dots.contains(new Point(i, j))) {
                    g.setColor(Color.YELLOW);
                    g.fillOval(MARGIN_SIZE + j * BLOCK_SIZE + BLOCK_SIZE / 2 - 2, MARGIN_SIZE + i * BLOCK_SIZE + BLOCK_SIZE / 2 - 2, 4, 4);
                } else if (i == ROWS / 2 && j >= COLS / 2 - 2 && j <= COLS / 2 + 1) {
                    g.setColor(Color.BLUE);
                    g.fillRect(MARGIN_SIZE + j * BLOCK_SIZE, MARGIN_SIZE + i * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE);
                } else if (ghosts.contains(new Point(i, j))) {
                    g.setColor(Color.RED);
                    g.fillOval(MARGIN_SIZE + j * BLOCK_SIZE + BLOCK_SIZE / 2 - 8, MARGIN_SIZE + i * BLOCK_SIZE + BLOCK_SIZE / 2 - 8, 16, 16);
                } else if (pacman.equals(new Point(i, j))) {
                    g.setColor(Color.YELLOW);
                    g.fillArc(MARGIN_SIZE + j * BLOCK_SIZE, MARGIN_SIZE + i * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE, pacmanDirection.ordinal() * 90 + 30, 300);
                }
            }
        }
        if (cherryCountdown == 0) {
            g.setColor(Color.RED);
            Point cherry = getRandomPoint();
            g.fillOval(MARGIN_SIZE + cherry.y * BLOCK_SIZE + BLOCK_SIZE / 2 - 5, MARGIN_SIZE + cherry.x * BLOCK_SIZE + BLOCK_SIZE / 2 - 5, 10, 10);
        }
    }

    @Override
    public void keyPressed(KeyEvent e) {
        switch (e.getKeyCode()) {
            case KeyEvent.VK_LEFT:
                pacmanDirection = Direction.LEFT;
                break;
            case KeyEvent.VK_UP:
                pacmanDirection = Direction.UP;
                break;
            case KeyEvent.VK_RIGHT:
                pacmanDirection = Direction.RIGHT;
                break;
            case KeyEvent.VK_DOWN:
                pacmanDirection = Direction.DOWN;
                break;
        }
    }

    @Override
    public void keyReleased(KeyEvent e) {
    }

    @Override
    public void keyTyped(KeyEvent e) {
    }

    public static void main(String[] args) {
        new PacMan().run();
    }

}

该实现使用Java Swing绘制游戏界面，并提供了简单的游戏规则和操作。您可以根据自己的需求对代码进行修改和扩展。希望对您有所帮助！