请编出以下代码使用JavaSwing完成一款五子棋小游戏 功能要求: 1. 设计五子棋游戏棋盘 2. 首页菜单要求具备重新开始、悔棋、退出功能 3. 游戏要求具备人人、人机模式 4. 提供帮助菜单 说明游戏规则 5. 游戏玩法需要符合五子棋游戏基本规则

以下是使用JavaSwing完成五子棋小游戏的示例代码：

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

public class GobangGame extends JFrame implements ActionListener {
    private static final long serialVersionUID = 1L;
    private final int ROW = 15, COL = 15; // 棋盘大小
    private final int BLOCK_SIZE = 30; // 棋子大小
    private final int MARGIN = 30; // 边距
    private JPanel jpBoard; // 棋盘面板
    private JButton btnStart; // 开始按钮
    private JButton btnRegret; // 悔棋按钮
    private JButton btnExit; // 退出按钮
    private JButton btnHelp; // 帮助按钮
    private JLabel lbMessage; // 提示信息
    private int[][] board; // 棋盘数组
    private int player; // 当前玩家
    private boolean gameOver; // 游戏是否结束
    private boolean isMan; // 是否人人对战

    public GobangGame() {
        super("五子棋小游戏");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(ROW * BLOCK_SIZE + MARGIN * 2, COL * BLOCK_SIZE + MARGIN * 2 + 50);

        jpBoard = new JPanel();
        jpBoard.setSize(ROW * BLOCK_SIZE, COL * BLOCK_SIZE);
        jpBoard.setLocation(MARGIN, MARGIN);
        jpBoard.setBackground(new Color(255, 206, 158));
        jpBoard.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                if (gameOver)
                    return;
                int x = e.getX() - MARGIN;
                int y = e.getY() - MARGIN;
                if (x < 0 || y < 0 || x > ROW * BLOCK_SIZE || y > COL * BLOCK_SIZE)
                    return;
                int row = y / BLOCK_SIZE;
                int col = x / BLOCK_SIZE;
                if (board[row][col] != 0)
                    return;
                board[row][col] = player;
                addChessman(row, col, player);
                if (isWin(row, col, player)) {
                    showResult(player);
                    gameOver = true;
                    return;
                }
                player = 3 - player;
                lbMessage.setText(player == 1 ? "黑子下棋" : "白子下棋");
                if (!isMan) {
                    computerAI();
                }
            }
        });

        JPanel jpBtns = new JPanel();
        jpBtns.setSize(ROW * BLOCK_SIZE, 50);
        jpBtns.setLocation(MARGIN, COL * BLOCK_SIZE + MARGIN * 2);
        jpBtns.setBackground(new Color(255, 206, 158));

        btnStart = new JButton("重新开始");
        btnStart.addActionListener(this);
        btnRegret = new JButton("悔棋");
        btnRegret.addActionListener(this);
        btnExit = new JButton("退出");
        btnExit.addActionListener(this);
        btnHelp = new JButton("帮助");
        btnHelp.addActionListener(this);

        lbMessage = new JLabel("黑子下棋");
        lbMessage.setFont(new Font("宋体", Font.PLAIN, 20));
        lbMessage.setForeground(Color.RED);

        jpBtns.add(btnStart);
        jpBtns.add(btnRegret);
        jpBtns.add(btnExit);
        jpBtns.add(btnHelp);
        jpBtns.add(lbMessage);

        getContentPane().setLayout(null);
        getContentPane().add(jpBoard);
        getContentPane().add(jpBtns);

        initGame();
    }

    // 初始化游戏
    private void initGame() {
        board = new int[ROW][COL];
        player = 1;
        gameOver = false;
        isMan = true;
        lbMessage.setText("黑子先下");
        jpBoard.removeAll();
        jpBoard.repaint();
    }

    // 添加棋子
    private void addChessman(int row, int col, int player) {
        JLabel lbChessman = new JLabel();
        lbChessman.setSize(BLOCK_SIZE, BLOCK_SIZE);
        lbChessman.setLocation(col * BLOCK_SIZE, row * BLOCK_SIZE);
        lbChessman.setIcon(new ImageIcon(player == 1 ? "black.png" : "white.png"));
        jpBoard.add(lbChessman);
        jpBoard.repaint();
    }

    // 判断是否胜利
    private boolean isWin(int row, int col, int player) {
        int count = 1;
        // 横向
        for (int i = col - 1; i >= 0; i--) {
            if (board[row][i] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;
        for (int i = col + 1; i < COL; i++) {
            if (board[row][i] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;

        // 纵向
        count = 1;
        for (int i = row - 1; i >= 0; i--) {
            if (board[i][col] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;
        for (int i = row + 1; i < ROW; i++) {
            if (board[i][col] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;

        // 左上-右下
        count = 1;
        for (int i = row - 1, j = col - 1; i >= 0 && j >= 0; i--, j--) {
            if (board[i][j] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;
        for (int i = row + 1, j = col + 1; i < ROW && j < COL; i++, j++) {
            if (board[i][j] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;

        // 右上-左下
        count = 1;
        for (int i = row - 1, j = col + 1; i >= 0 && j < COL; i--, j++) {
            if (board[i][j] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;
        for (int i = row + 1, j = col - 1; i < ROW && j >= 0; i++, j--) {
            if (board[i][j] == player) {
                count++;
            } else {
                break;
            }
        }
        if (count >= 5)
            return true;

        return false;
    }

    // 显示游戏结果
    private void showResult(int player) {
        String message = player == 1 ? "黑方胜利！" : "白方胜利！";
        JOptionPane.showMessageDialog(this, message, "游戏结束", JOptionPane.INFORMATION_MESSAGE);
    }

    // 悔棋
    private void regretChess() {
        Component[] chessmen = jpBoard.getComponents();
        if (chessmen.length == 0)
            return;
        JLabel lbChessman = (JLabel) chessmen[chessmen.length - 1];
        int row = lbChessman.getY() / BLOCK_SIZE;
        int col = lbChessman.getX() / BLOCK_SIZE;
        board[row][col] = 0;
        jpBoard.remove(lbChessman);
        jpBoard.repaint();
        player = 3 - player;
        lbMessage.setText(player == 1 ? "黑子下棋" : "白子下棋");
    }

    // 电脑AI下棋
    private void computerAI() {
        int row = 0, col = 0;
        int maxScore = 0;
        int[][] scores = new int[ROW][COL];
        for (int i = 0; i < ROW; i++) {
            for (int j = 0; j < COL; j++) {
                if (board[i][j] == 0) {
                    scores[i][j] = getScore(i, j);
                    if (scores[i][j] > maxScore) {
                        maxScore = scores[i][j];
                        row = i;
                        col = j;
                    }
                }
            }
        }
        board[row][col] = player;
        addChessman(row, col, player);
        if (isWin(row, col, player)) {
            showResult(player);
            gameOver = true;
            return;
        }
        player = 3 - player;
        lbMessage.setText(player == 1 ? "黑子下棋" : "白子下棋");
    }

    // 根据棋盘得分
    private int getScore(int row, int col) {
        int score = 0;

        // 横向
        for (int i = col - 4; i <= col; i++) {
            if (i < 0 || i + 4 >= COL)
                continue;
            int count = 0;
            for (int j = 0; j < 5; j++) {
                if (board[row][i + j] == player)
                    count++;
            }
            if (count == 0)
                score += 7;
            else if (count == 1)
                score += 35;
            else if (count == 2)
                score += 800;
            else if (count == 3)
                score += 15000;
            else if (count == 4)
                score += 800000;
        }

        // 纵向
        for (int i = row - 4; i <= row; i++) {
            if (i < 0 || i + 4 >= ROW)
                continue;
            int count = 0;
            for (int j = 0; j < 5; j++) {
                if (board[i + j][col] == player)
                    count++;
            }
            if (count == 0)
                score += 7;
            else if (count == 1)
                score += 35;
            else if (count == 2)
                score += 800;
            else if (count == 3)
                score += 15000;
            else if (count == 4)
                score += 800000;
        }

        // 左上-右下
        for (int i = row - 4, j = col - 4; i <= row && j <= col; i++, j++) {
            if (i < 0 || j < 0 || i + 4 >= ROW || j + 4 >= COL)
                continue;
            int count = 0;
            for (int k = 0; k < 5; k++) {
                if (board[i + k][j + k] == player)
                    count++;
            }
            if (count == 0)
                score += 7;
            else if (count == 1)
                score += 35;
            else if (count == 2)
                score += 800;
            else if (count == 3)
                score += 15000;
            else if (count == 4)
                score += 800000;
        }

        // 右上-左下
        for (int i = row - 4, j = col + 4; i <= row && j >= col; i++, j--) {
            if (i < 0 || j < 0 || i + 4 >= ROW || j - 4 >= COL)
                continue;
            int count = 0;
            for (int k = 0; k < 5; k++) {
                if (board[i + k][j - k] == player)
                    count++;
            }
            if (count == 0)
                score += 7;
            else if (count == 1)
                score += 35;
            else if (count == 2)
                score += 800;
            else if (count == 3)
                score += 15000;
            else if (count == 4)
                score += 800000;
        }

        return score;
    }

    // 处理按钮事件
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == btnStart) {
            initGame();
        } else if (e.getSource() == btnRegret) {
            regretChess();
        } else if (e.getSource() == btnExit) {
            System.exit(0);
        } else if (e.getSource() == btnHelp) {
            JOptionPane.showMessageDialog(this, "五子棋规则：\n1、黑方先行，双方轮流下子；\n2、每次只能下一子，落子后不能更改；\n3、当一方在横、竖、斜方向上先形成连续的五个子时，游戏结束，该方获胜。", "游戏规则", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    public static void main(String[] args) {
        GobangGame game = new GobangGame();
        game.setVisible(true);
    }
}

在代码中，我们使用JPanel来实现游戏的棋盘面板，并通过MouseListener监听鼠标点击事件，实现玩家下棋。同时，我们还提供了悔棋、重新开始、退出、帮助等功能，以及人人对战和人机对战两种模式。其中，电脑AI下棋的算法采用了一种简单的启发式算法，根据棋盘得分来决定电脑下棋的位置。