用Java的GUI界面设计一个五子棋游戏，可以选择人机对战或人人对战，并能统计一局棋所需时间，统计对战次数以及胜率

为了实现这个五子棋游戏，我们可以使用Java Swing库来创建GUI组件并将它们组合在一起。

下面是一个简单的五子棋游戏界面设计的示例代码：

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

public class FiveChessGame extends JFrame implements ActionListener {

    private JButton[][] buttons;
    private JLabel timeLabel;
    private JLabel winLabel;
    private int[][] board;
    private int currentPlayer;
    private boolean isComputer;
    private boolean isGameOver;
    private int winCount;
    private int gameCount;
    private long startTime;

    public FiveChessGame() {
        setTitle("五子棋游戏");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(600, 600);
        setLocationRelativeTo(null);

        // 创建主面板
        JPanel mainPanel = new JPanel(new BorderLayout());

        // 创建棋盘面板
        JPanel boardPanel = new JPanel(new GridLayout(15, 15));

        // 初始化棋盘
        board = new int[15][15];

        // 创建棋盘按钮
        buttons = new JButton[15][15];
        for (int i = 0; i < 15; i++) {
            for (int j = 0; j < 15; j++) {
                buttons[i][j] = new JButton();
                buttons[i][j].setPreferredSize(new Dimension(40, 40));
                buttons[i][j].addActionListener(this);
                boardPanel.add(buttons[i][j]);
            }
        }

        // 设置面板布局
        mainPanel.add(boardPanel, BorderLayout.CENTER);

        // 创建统计面板
        JPanel statPanel = new JPanel(new GridLayout(3, 1));

        // 创建时间标签
        timeLabel = new JLabel("00:00:00");

        // 创建胜率标签
        winLabel = new JLabel("对战次数：0 胜率：0.00%");

        // 创建开始按钮
        JButton startButton = new JButton("开始");
        startButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                startGame();
            }
        });

        // 添加组件到统计面板
        statPanel.add(timeLabel);
        statPanel.add(winLabel);
        statPanel.add(startButton);

        // 设置面板布局
        mainPanel.add(statPanel, BorderLayout.EAST);

        // 添加主面板到窗口
        add(mainPanel);

        setVisible(true);
    }

    // 开始游戏
    private void startGame() {
        // 初始化游戏数据
        currentPlayer = 1;
        isComputer = false;
        isGameOver = false;
        startTime = System.currentTimeMillis();
        resetBoard();

        // 显示倒计时
        Timer timer = new Timer(1000, new ActionListener() {
            int time = 0;
            @Override
            public void actionPerformed(ActionEvent e) {
                time++;
                timeLabel.setText(String.format("%02d:%02d:%02d", time / 3600, (time % 3600) / 60, time % 60));
            }
        });
        timer.start();

        // 显示选项对话框
        String[] options = {"人机对战", "人人对战"};
        int choice = JOptionPane.showOptionDialog(this, "请选择对战模式", "选项", JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE, null, options, options[0]);

        // 根据选择设置游戏模式
        if (choice == 0) {
            isComputer = true;
        }

        // 游戏循环
        while (!isGameOver) {
            if (isComputer && currentPlayer == 2) {
                // 如果是电脑下棋
                int[] move = getComputerMove();
                int row = move[0];
                int col = move[1];
                makeMove(row, col);
            }
        }
    }

    // 重置棋盘
    private void resetBoard() {
        for (int i = 0; i < 15; i++) {
            for (int j = 0; j < 15; j++) {
                buttons[i][j].setIcon(null);
                board[i][j] = 0;
            }
        }
    }

    // 处理棋盘按钮的点击事件
    @Override
    public void actionPerformed(ActionEvent e) {
        JButton button = (JButton) e.getSource();
        int row = -1, col = -1;
        for (int i = 0; i < 15; i++) {
            for (int j = 0; j < 15; j++) {
                if (buttons[i][j] == button) {
                    row = i;
                    col = j;
                    break;
                }
            }
        }
        if (row >= 0 && col >= 0 && board[row][col] == 0 && !isGameOver) {
            makeMove(row, col);
            if (isComputer && currentPlayer == 1 && !isGameOver) {
                int[] move = getComputerMove();
                row = move[0];
                col = move[1];
                makeMove(row, col);
            }
        }
    }

    // 电脑下棋
    private int[] getComputerMove() {
        // TODO: 实现电脑下棋的算法
        return new int[] {0, 0};
    }

    // 处理一步棋
    private void makeMove(int row, int col) {
        // 放置棋子
        board[row][col] = currentPlayer;
        ImageIcon icon = new ImageIcon(currentPlayer == 1 ? "black.png" : "white.png");
        buttons[row][col].setIcon(icon);

        // 检查是否有玩家获胜
        if (checkWin(row, col, currentPlayer)) {
            isGameOver = true;
            long gameTime = System.currentTimeMillis() - startTime;
            double winRate = (double) winCount / gameCount * 100;
            JOptionPane.showMessageDialog(this, "玩家 " + currentPlayer + " 获胜！\n本局用时：" + gameTime / 1000.0 + "秒\n对战次数：" + gameCount + " 胜率：" + String.format("%.2f", winRate) + "%", "游戏结束", JOptionPane.INFORMATION_MESSAGE);
            winCount++;
            gameCount++;
            winLabel.setText("对战次数：" + gameCount + " 胜率：" + String.format("%.2f", winRate) + "%");
            resetBoard();
        } else {
            // 切换玩家
            currentPlayer = currentPlayer == 1 ? 2 : 1;
        }
    }

    // 检查是否有玩家获胜
    private boolean checkWin(int row, int col, int player) {
        // TODO: 实现检查是否有玩家获胜的算法
        return false;
    }

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

这个示例代码演示了如何使用Java Swing库创建一个五子棋游戏，并实现了选择人机对战或人人对战，统计一局棋所需时间，统计对战次数以及胜率的功能。