用java编写一个简单可游玩的五子棋界面

好的，以下是一个简单的五子棋界面的Java代码示例：

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

public class Gobang extends JFrame implements ActionListener, MouseListener {
    private static final long serialVersionUID = 1L;

    private JButton button_begin = new JButton("开始游戏");
    private JButton button_restart = new JButton("重新开始");
    private JButton button_undo = new JButton("悔棋");
    private JPanel panel_board = new JPanel();
    private int board[][] = new int[15][15];
    private int player = 1;
    private int steps = 0;
    private int x = -1, y = -1;

    public Gobang() {
        super("五子棋");

        button_begin.addActionListener(this);
        button_restart.addActionListener(this);
        button_undo.addActionListener(this);
        panel_board.addMouseListener(this);
        panel_board.setPreferredSize(new Dimension(450, 450));

        JPanel panel_button = new JPanel(new FlowLayout());
        panel_button.add(button_begin);
        panel_button.add(button_restart);
        panel_button.add(button_undo);

        JPanel panel_main = new JPanel(new BorderLayout());
        panel_main.add(panel_button, BorderLayout.NORTH);
        panel_main.add(panel_board, BorderLayout.CENTER);

        setContentPane(panel_main);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == button_begin) {
            player = 1;
            steps = 0;
            x = -1;
            y = -1;
            board = new int[15][15];
            repaint();
        } else if (e.getSource() == button_restart) {
            player = 1;
            steps = 0;
            x = -1;
            y = -1;
            board = new int[15][15];
            repaint();
        } else if (e.getSource() == button_undo) {
            if (steps > 0) {
                board[x][y] = 0;
                steps--;
                player = 3 - player;
                x = -1;
                y = -1;
                repaint();
            }
        }
    }

    public void mousePressed(MouseEvent e) {
        if (player == 1) {
            int i = e.getX() / 30;
            int j = e.getY() / 30;
            if (i >= 0 && i < 15 && j >= 0 && j < 15 && board[i][j] == 0) {
                board[i][j] = 1;
                steps++;
                player = 2;
                x = i;
                y = j;
                repaint();
                check();
            }
        }
    }

    private void check() {
        int count = 0;
        for (int i = x - 4; i <= x + 4; i++) {
            if (i >= 0 && i < 15 && board[i][y] == player) {
                count++;
                if (count == 5) {
                    JOptionPane.showMessageDialog(null, "玩家 " + player + " 获胜！");
                    button_begin.setEnabled(true);
                    button_restart.setEnabled(false);
                    button_undo.setEnabled(false);
                    break;
                }
            } else {
                count = 0;
            }
        }
        count = 0;
        for (int j = y - 4; j <= y + 4; j++) {
            if (j >= 0 && j < 15 && board[x][j] == player) {
                count++;
                if (count == 5) {
                    JOptionPane.showMessageDialog(null, "玩家 " + player + " 获胜！");
                    button_begin.setEnabled(true);
                    button_restart.setEnabled(false);
                    button_undo.setEnabled(false);
                    break;
                }
            } else {
                count = 0;
            }
        }
        count = 0;
        for (int i = x - 4, j = y - 4; i <= x + 4; i++, j++) {
            if (i >= 0 && i < 15 && j >= 0 && j < 15 && board[i][j] == player) {
                count++;
                if (count == 5) {
                    JOptionPane.showMessageDialog(null, "玩家 " + player + " 获胜！");
                    button_begin.setEnabled(true);
                    button_restart.setEnabled(false);
                    button_undo.setEnabled(false);
                    break;
                }
            } else {
                count = 0;
            }
        }
        count = 0;
        for (int i = x - 4, j = y + 4; i <= x + 4; i++, j--) {
            if (i >= 0 && i < 15 && j >= 0 && j < 15 && board[i][j] == player) {
                count++;
                if (count == 5) {
                    JOptionPane.showMessageDialog(null, "玩家 " + player + " 获胜！");
                    button_begin.setEnabled(true);
                    button_restart.setEnabled(false);
                    button_undo.setEnabled(false);
                    break;
                }
            } else {
                count = 0;
            }
        }
        if (steps == 225) {
            JOptionPane.showMessageDialog(null, "和局！");
            button_begin.setEnabled(true);
            button_restart.setEnabled(false);
            button_undo.setEnabled(false);
        }
    }

    public void mouseEntered(MouseEvent e) {
    }

    public void mouseExited(MouseEvent e) {
    }

    public void mouseClicked(MouseEvent e) {
    }

    public void mouseReleased(MouseEvent e) {
    }

    public void paint(Graphics g) {
        super.paint(g);
        for (int i = 0; i < 15; i++) {
            g.drawLine(15 + i * 30, 15, 15 + i * 30, 435);
            g.drawLine(15, 15 + i * 30, 435, 15 + i * 30);
        }
        for (int i = 0; i < 15; i++) {
            for (int j = 0; j < 15; j++) {
                if (board[i][j] == 1) {
                    g.setColor(Color.BLACK);
                    g.fillOval(10 + i * 30, 10 + j * 30, 20, 20);
                } else if (board[i][j] == 2) {
                    g.setColor(Color.WHITE);
                    g.fillOval(10 + i * 30, 10 + j * 30, 20, 20);
                }
            }
        }
    }

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

这段代码实现了一个简单的五子棋界面，包含开始游戏、重新开始、悔棋等功能。玩家可以用鼠标在棋盘上下棋，程序会自动判断胜负并提示。