给出java实现拼图的代码

以下是一个简单的 Java 拼图游戏的实现代码：

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

public class PuzzleGame extends JFrame implements ActionListener {

    private JButton[] buttons;
    private JPanel panel;
    private ImageIcon[] images;
    private int[] solution;
    private int emptyIndex;

    public PuzzleGame() {
        setTitle("Puzzle Game");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 300);
        setLocationRelativeTo(null);

        panel = new JPanel(new GridLayout(3, 3));
        add(panel, BorderLayout.CENTER);

        images = new ImageIcon[9];
        for (int i = 0; i < images.length; i++) {
            images[i] = new ImageIcon("image" + (i + 1) + ".jpg");
        }

        buttons = new JButton[9];
        for (int i = 0; i < buttons.length; i++) {
            buttons[i] = new JButton(images[i]);
            buttons[i].addActionListener(this);
            panel.add(buttons[i]);
        }

        solution = new int[] {0, 1, 2, 3, 4, 5, 6, 7, 8};
        emptyIndex = 8;

        shuffle();

        setVisible(true);
    }

    private void shuffle() {
        for (int i = 0; i < 100; i++) {
            int randomIndex = (int) (Math.random() * 8);
            swap(emptyIndex, randomIndex);
            emptyIndex = randomIndex;
        }
    }

    private void swap(int i, int j) {
        ImageIcon tempIcon = buttons[i].getIcon();
        buttons[i].setIcon(buttons[j].getIcon());
        buttons[j].setIcon(tempIcon);

        int tempIndex = solution[i];
        solution[i] = solution[j];
        solution[j] = tempIndex;
    }

    private boolean isSolved() {
        for (int i = 0; i < solution.length; i++) {
            if (solution[i] != i) {
                return false;
            }
        }
        return true;
    }

    public void actionPerformed(ActionEvent e) {
        JButton button = (JButton) e.getSource();
        int index = -1;
        for (int i = 0; i < buttons.length; i++) {
            if (buttons[i] == button) {
                index = i;
                break;
            }
        }
        if (index == emptyIndex - 1 || index == emptyIndex + 1 || index == emptyIndex - 3 || index == emptyIndex + 3) {
            swap(index, emptyIndex);
            emptyIndex = index;
            if (isSolved()) {
                JOptionPane.showMessageDialog(this, "Congratulations! You solved the puzzle!");
            }
        }
    }

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

这个程序使用了 Java 的 Swing GUI 库来实现一个简单的拼图游戏。程序中的 `shuffle()` 方法用于打乱拼图，`swap()` 方法用于交换两个拼图块的位置，`isSolved()` 方法用于检查拼图是否已经完成。程序中的 `actionPerformed()` 方法用于处理用户点击拼图块的事件。