用java编写一个华容道程序，要求使用swing

以下是一个简单的华容道程序示例，使用了 Java 的 Swing 框架：

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

public class HuarongDao extends JFrame implements ActionListener {
    private JButton[][] buttons;
    private JPanel boardPanel;
    private JButton resetButton;
    private int[][] board;

    public HuarongDao() {
        super("华容道");

        // 初始化界面
        boardPanel = new JPanel(new GridLayout(4, 5));
        buttons = new JButton[4][5];
        board = new int[4][5];
        resetButton = new JButton("重新开始");

        // 添加按钮和监听器
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 5; j++) {
                buttons[i][j] = new JButton();
                buttons[i][j].addActionListener(this);
                boardPanel.add(buttons[i][j]);
            }
        }
        resetButton.addActionListener(this);

        // 布局界面
        setLayout(new BorderLayout());
        add(boardPanel, BorderLayout.CENTER);
        add(resetButton, BorderLayout.SOUTH);

        // 初始化游戏状态
        resetGame();

        // 设置窗口属性
        setSize(400, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    // 重新开始游戏
    private void resetGame() {
        board[0][0] = 1;
        board[0][1] = 1;
        board[0][2] = 1;
        board[0][3] = 2;
        board[0][4] = 2;
        board[1][0] = 3;
        board[1][1] = 3;
        board[1][2] = 4;
        board[1][3] = 5;
        board[1][4] = 2;
        board[2][0] = 3;
        board[2][1] = 3;
        board[2][2] = 4;
        board[2][3] = 5;
        board[2][4] = 2;
        board[3][0] = 6;
        board[3][1] = 6;
        board[3][2] = 7;
        board[3][3] = 7;
        board[3][4] = 8;

        updateBoard();
    }

    // 更新游戏面板
    private void updateBoard() {
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 5; j++) {
                if (board[i][j] == 0) {
                    buttons[i][j].setText("");
                } else {
                    buttons[i][j].setText("" + board[i][j]);
                }
            }
        }
    }

    // 处理按钮点击事件
    public void actionPerformed(ActionEvent e) {
        Object source = e.getSource();

        // 重新开始游戏
        if (source == resetButton) {
            resetGame();
            return;
        }

        // 查找点击的按钮
        int row = -1, col = -1;
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 5; j++) {
                if (source == buttons[i][j]) {
                    row = i;
                    col = j;
                    break;
                }
            }
        }

        // 移动棋子
        if (row >= 0 && col >= 0) {
            int val = board[row][col];
            if (val == 0) {
                return;
            }

            // 向左移动
            if (col > 0 && board[row][col - 1] == 0) {
                board[row][col] = 0;
                board[row][col - 1] = val;
            }
            // 向右移动
            else if (col < 4 && board[row][col + 1] == 0) {
                board[row][col] = 0;
                board[row][col + 1] = val;
            }
            // 向上移动
            else if (row > 0 && board[row - 1][col] == 0) {
                board[row][col] = 0;
                board[row - 1][col] = val;
            }
            // 向下移动
            else if (row < 3 && board[row + 1][col] == 0) {
                board[row][col] = 0;
                board[row + 1][col] = val;
            }

            // 更新界面
            updateBoard();
        }
    }

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

这个示例程序创建了一个 4 行 5 列的按钮面板，用于模拟华容道游戏的棋盘。每个按钮上显示了对应的棋子编号，按钮的点击事件被用于实现棋子的移动。在程序中，使用了 Java 的 Swing 框架来实现界面的布局和按钮的响应。