Java 拼图游戏的代码

以下是一个简单的 Java 拼图游戏的代码示例，包括拼图分割、拖动、拼图完成判断等功能：

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;

public class PuzzleGame extends JFrame implements ActionListener, MouseListener, MouseMotionListener {
    private static final long serialVersionUID = 1L;
    private JPanel panel;
    private JLabel[] labels;
    private int emptyIndex;
    private int rows = 3;
    private int cols = 3;

    public PuzzleGame() {
        super("Puzzle Game");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());
        setResizable(false);
        setSize(500, 500);
        setLocationRelativeTo(null);

        panel = new JPanel(new GridLayout(rows, cols));
        add(panel, BorderLayout.CENTER);

        ImageIcon imageIcon = new ImageIcon("puzzle.jpg");
        Image image = imageIcon.getImage();
        int width = image.getWidth(null) / cols;
        int height = image.getHeight(null) / rows;
        labels = new JLabel[rows * cols];

        int index = 0;
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                int x = j * width;
                int y = i * height;
                Image subImage = image.getScaledInstance(width, height, Image.SCALE_DEFAULT);
                subImage = subImage.getSubimage(x, y, width, height);
                ImageIcon subIcon = new ImageIcon(subImage);
                labels[index] = new JLabel(subIcon);
                labels[index].setBorder(BorderFactory.createLineBorder(Color.BLACK));
                labels[index].addMouseListener(this);
                labels[index].addMouseMotionListener(this);
                panel.add(labels[index]);
                index++;
            }
        }

        // 设置空图块
        emptyIndex = rows * cols - 1;
        labels[emptyIndex].setIcon(null);

        shuffle();

        setVisible(true);
    }

    private void shuffle() {
        Random random = new Random();
        for (int i = 0; i < 1000; i++) {
            int index = random.nextInt(rows * cols);
            if (index != emptyIndex) {
                swap(index);
            }
        }
    }

    private void swap(int index) {
        int x1 = index % cols;
        int y1 = index / cols;
        int x2 = emptyIndex % cols;
        int y2 = emptyIndex / cols;
        if ((x1 == x2 && Math.abs(y1 - y2) == 1) || (y1 == y2 && Math.abs(x1 - x2) == 1)) {
            JLabel label1 = labels[index];
            JLabel label2 = labels[emptyIndex];
            label2.setIcon(label1.getIcon());
            label1.setIcon(null);
            emptyIndex = index;
        }
    }

    private boolean isCompleted() {
        for (int i = 0; i < rows * cols - 1; i++) {
            ImageIcon icon1 = (ImageIcon)labels[i].getIcon();
            ImageIcon icon2 = new ImageIcon("puzzle.jpg");
            Image image1 = icon1.getImage();
            Image image2 = icon2.getImage();
            if (!image1.equals(image2)) {
                return false;
            }
        }
        return true;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (isCompleted()) {
            JOptionPane.showMessageDialog(this, "Congratulations! You have completed the puzzle!");
        }
    }

    @Override
    public void mousePressed(MouseEvent e) {
        JLabel label = (JLabel)e.getSource();
        int index = Arrays.asList(labels).indexOf(label);
        swap(index);
    }

    @Override
    public void mouseDragged(MouseEvent e) {
        // 拖动图块
        JLabel label = (JLabel)e.getSource();
        label.setLocation(label.getX() + e.getX() - label.getWidth() / 2, label.getY() + e.getY() - label.getHeight() / 2);
    }

    @Override
    public void mouseReleased(MouseEvent e) {
        JLabel label = (JLabel)e.getSource();
        int index = Arrays.asList(labels).indexOf(label);
        Point point = label.getLocation();
        Rectangle bounds = panel.getBounds();
        if (bounds.contains(point)) {
            int x = point.x / label.getWidth();
            int y = point.y / label.getHeight();
            int newIndex = y * cols + x;
            if (newIndex != emptyIndex) {
                swap(index);
            }
        } else {
            label.setLocation(index % cols * label.getWidth(), index / cols * label.getHeight());
        }
    }

    @Override
    public void mouseClicked(MouseEvent e) {
    }

    @Override
    public void mouseEntered(MouseEvent e) {
    }

    @Override
    public void mouseExited(MouseEvent e) {
    }

    @Override
    public void mouseMoved(MouseEvent e) {
    }

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

在这个示例中，我们使用了一个 JPanel 来展示拼图，并将拼图图片分割成小块，使用 JLabel 来展示每个小块。我们使用鼠标事件监听器来实现拖动小块来移动拼图，使用 swap() 方法来交换空图块和鼠标点击的图块。使用 shuffle() 方法来随机打乱拼图，使用 isCompleted() 方法来判断拼图是否完成。最后，我们将 PuzzleGame 实例化并显示出来。