Java五子棋游戏：带图形界面的简单实现

以下是一个简单的五子棋程序的Java代码，使用Swing库构建了图形界面：

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

public class Gobang extends JFrame {
    private final int ROWS = 15;
    private final int COLS = 15;
    private final int CELL_SIZE = 40;
    private final int WIDTH = COLS * CELL_SIZE;
    private final int HEIGHT = ROWS * CELL_SIZE;

    private int[][] board;
    private boolean isBlackTurn;

    public Gobang() {
        setTitle('Gobang');
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        board = new int[ROWS][COLS];
        isBlackTurn = true;

        JPanel panel = new JPanel() {
            @Override
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                for (int row = 0; row < ROWS; row++) {
                    for (int col = 0; col < COLS; col++) {
                        int x = col * CELL_SIZE;
                        int y = row * CELL_SIZE;

                        if (board[row][col] == 1) {
                            g.setColor(Color.BLACK);
                            g.fillOval(x, y, CELL_SIZE, CELL_SIZE);
                        } else if (board[row][col] == 2) {
                            g.setColor(Color.WHITE);
                            g.fillOval(x, y, CELL_SIZE, CELL_SIZE);
                        }

                        g.setColor(Color.BLACK);
                        g.drawRect(x, y, CELL_SIZE, CELL_SIZE);
                    }
                }
            }
        };

        panel.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                int x = e.getX() / CELL_SIZE;
                int y = e.getY() / CELL_SIZE;

                if (board[y][x] == 0) {
                    if (isBlackTurn) {
                        board[y][x] = 1;
                    } else {
                        board[y][x] = 2;
                    }
                    isBlackTurn = !isBlackTurn;
                    panel.repaint();
                }
            }
        });

        add(panel);
        setVisible(true);
    }

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

运行以上代码，将会显示一个简单的五子棋界面。您可以通过鼠标点击来下棋，黑子和白子轮流下棋。