用java做一个五子棋小程序，棋盘16乘以16，第一行为空格和1到15的数字，第一列为空格和A到O的大写字母，剩下15乘以15为棋盘，程序可以自动判断输赢，当一方获胜后，提示获胜方，并标识出获胜的五颗棋子，可以悔棋，黑棋用大写字母X表示，白棋用大写字母Y表示，并且有一个菜单，菜单有“新游戏”和“悔棋”两个选项

好的，我可以为你提供一些思路和代码实现。首先，我们需要设计一个棋盘的数据结构，可以使用一个二维数组来表示，数组的大小为16*16。棋子可以用一个枚举类型表示，黑棋为X，白棋为Y，空位为NONE。

public enum ChessType {
    X, Y, NONE
}

public class ChessBoard {
    private ChessType[][] board;
    private int lastX;
    private int lastY;
    //构造函数
    public ChessBoard() {
        board = new ChessType[16][16];
        for (int i = 0; i < 16; i++) {
            for (int j = 0; j < 16; j++) {
                board[i][j] = ChessType.NONE;
            }
        }
    }
    
    //下棋方法
    public boolean putChess(int x, int y, ChessType type) {
        if (board[x][y] != ChessType.NONE) {
            return false;
        }
        board[x][y] = type;
        lastX = x;
        lastY = y;
        return true;
    }
    
    //悔棋方法
    public boolean undo() {
        if (lastX == -1 || lastY == -1) {
            return false;
        }
        board[lastX][lastY] = ChessType.NONE;
        lastX = -1;
        lastY = -1;
        return true;
    }
    
    //判断获胜方法
    public boolean isWin(ChessType type) {
        int count = 0;
        //横向判断
        for (int i = 0; i < 16; i++) {
            count = 0;
            for (int j = 0; j < 16; j++) {
                if (board[i][j] == type) {
                    count++;
                } else {
                    count = 0;
                }
                if (count == 5) {
                    return true;
                }
            }
        }
        //纵向判断
        for (int i = 0; i < 16; i++) {
            count = 0;
            for (int j = 0; j < 16; j++) {
                if (board[j][i] == type) {
                    count++;
                } else {
                    count = 0;
                }
                if (count == 5) {
                    return true;
                }
            }
        }
        //左上到右下斜向判断
        for (int i = 0; i < 11; i++) {
            for (int j = 0; j < 11; j++) {
                count = 0;
                for (int k = 0; k < 5; k++) {
                    if (board[i+k][j+k] == type) {
                        count++;
                    } else {
                        count = 0;
                    }
                    if (count == 5) {
                        return true;
                    }
                }
            }
        }
        //右上到左下斜向判断
        for (int i = 0; i < 11; i++) {
            for (int j = 4; j < 16; j++) {
                count = 0;
                for (int k = 0; k < 5; k++) {
                    if (board[i+k][j-k] == type) {
                        count++;
                    } else {
                        count = 0;
                    }
                    if (count == 5) {
                        return true;
                    }
                }
            }
        }
        return false;
    }
    
    //打印棋盘方法
    public void printBoard() {
        System.out.print("   ");
        for (int i = 0; i < 15; i++) {
            System.out.print((char)('A'+i) + " ");
        }
        System.out.println();
        for (int i = 0; i < 16; i++) {
            if (i < 10) {
                System.out.print(" " + i + " ");
            } else {
                System.out.print(i + " ");
            }
            for (int j = 0; j < 15; j++) {
                if (board[i][j] == ChessType.X) {
                    System.out.print("X ");
                } else if (board[i][j] == ChessType.Y) {
                    System.out.print("Y ");
                } else {
                    System.out.print("+ ");
                }
            }
            System.out.println();
        }
    }
}

然后我们需要实现一个用户界面，用于接收用户的输入和展示棋盘。用户界面可以使用Java Swing实现，具体可以参考以下代码：

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

public class ChessFrame extends JFrame implements ActionListener {
    private ChessBoard board;
    private JButton[][] buttons;
    private JButton newGameButton;
    private JButton undoButton;
    private JLabel messageLabel;
    private boolean isBlackTurn;

    public ChessFrame() {
        this.board = new ChessBoard();
        this.buttons = new JButton[15][15];
        this.isBlackTurn = true;
        initUI();
    }

    private void initUI() {
        JPanel boardPanel = new JPanel(new GridLayout(15, 15));
        for (int i = 0; i < 15; i++) {
            for (int j = 0; j < 15; j++) {
                JButton button = new JButton();
                button.setPreferredSize(new Dimension(30, 30));
                button.addActionListener(this);
                button.setActionCommand(i + "," + j);
                buttons[i][j] = button;
                boardPanel.add(button);
            }
        }
        JPanel controlPanel = new JPanel();
        newGameButton = new JButton("New Game");
        newGameButton.addActionListener(this);
        undoButton = new JButton("Undo");
        undoButton.addActionListener(this);
        messageLabel = new JLabel("Black's turn");
        controlPanel.add(newGameButton);
        controlPanel.add(undoButton);
        controlPanel.add(messageLabel);
        add(boardPanel, BorderLayout.CENTER);
        add(controlPanel, BorderLayout.SOUTH);
        setTitle("Five in a Row");
        setSize(600, 600);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        String command = e.getActionCommand();
        if (command.equals("New Game")) {
            board = new ChessBoard();
            isBlackTurn = true;
            messageLabel.setText("Black's turn");
            for (int i = 0; i < 15; i++) {
                for (int j = 0; j < 15; j++) {
                    buttons[i][j].setText("");
                }
            }
            return;
        }
        if (command.equals("Undo")) {
            boolean result = board.undo();
            if (result) {
                isBlackTurn = !isBlackTurn;
                messageLabel.setText(isBlackTurn ? "Black's turn" : "White's turn");
                int lastX = board.getLastX();
                int lastY = board.getLastY();
                buttons[lastX][lastY].setText("");
            }
            return;
        }
        String[] parts = command.split(",");
        int x = Integer.parseInt(parts[0]);
        int y = Integer.parseInt(parts[1]);
        ChessType type = isBlackTurn ? ChessType.X : ChessType.Y;
        boolean result = board.putChess(x, y, type);
        if (result) {
            buttons[x][y].setText(isBlackTurn ? "X" : "Y");
            if (board.isWin(type)) {
                String message = isBlackTurn ? "Black wins" : "White wins";
                messageLabel.setText(message);
                JOptionPane.showMessageDialog(this, message);
                board = new ChessBoard();
                isBlackTurn = true;
                messageLabel.setText("Black's turn");
                for (int i = 0; i < 15; i++) {
                    for (int j = 0; j < 15; j++) {
                        buttons[i][j].setText("");
                    }
                }
            } else {
                isBlackTurn = !isBlackTurn;
                messageLabel.setText(isBlackTurn ? "Black's turn" : "White's turn");
            }
        }
    }

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

以上就是一个简单的五子棋小程序的实现。希望对你有帮助。