java双人对战五子棋

下面是一个简单的双人对战五子棋的 Java 代码示例：

import java.util.Scanner;

public class Gobang {

    // 定义棋盘大小
    public static final int BOARD_SIZE = 15;

    // 定义棋盘数组
    private String[][] board = new String[BOARD_SIZE][BOARD_SIZE];

    // 定义当前玩家和对手的棋子颜色
    private String currentPlayer;
    private String opponent;

    public Gobang() {
        // 初始化棋盘
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                board[i][j] = "+";
            }
        }
        // 随机选择先手
        if (Math.random() > 0.5) {
            currentPlayer = "X";
            opponent = "O";
        } else {
            currentPlayer = "O";
            opponent = "X";
        }
    }

    // 输出棋盘
    public void printBoard() {
        System.out.println("  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15");
        for (int i = 0; i < BOARD_SIZE; i++) {
            System.out.print((i + 1) + " ");
            for (int j = 0; j < BOARD_SIZE; j++) {
                System.out.print(board[i][j] + " ");
            }
            System.out.println();
        }
    }

    // 判断游戏是否结束
    public boolean isGameOver(int x, int y) {
        // 判断横向是否有五个棋子相连
        int count = 1;
        for (int i = y + 1; i < BOARD_SIZE && board[x][i].equals(currentPlayer); i++) {
            count++;
        }
        for (int i = y - 1; i >= 0 && board[x][i].equals(currentPlayer); i--) {
            count++;
        }
        if (count >= 5) {
            return true;
        }
        // 判断纵向是否有五个棋子相连
        count = 1;
        for (int i = x + 1; i < BOARD_SIZE && board[i][y].equals(currentPlayer); i++) {
            count++;
        }
        for (int i = x - 1; i >= 0 && board[i][y].equals(currentPlayer); i--) {
            count++;
        }
        if (count >= 5) {
            return true;
        }
        // 判断右斜向是否有五个棋子相连
        count = 1;
        for (int i = x + 1, j = y + 1; i < BOARD_SIZE && j < BOARD_SIZE && board[i][j].equals(currentPlayer); i++, j++) {
            count++;
        }
        for (int i = x - 1, j = y - 1; i >= 0 && j >= 0 && board[i][j].equals(currentPlayer); i--, j--) {
            count++;
        }
        if (count >= 5) {
            return true;
        }
        // 判断左斜向是否有五个棋子相连
        count = 1;
        for (int i = x + 1, j = y - 1; i < BOARD_SIZE && j >= 0 && board[i][j].equals(currentPlayer); i++, j--) {
            count++;
        }
        for (int i = x - 1, j = y + 1; i >= 0 && j < BOARD_SIZE && board[i][j].equals(currentPlayer); i--, j++) {
            count++;
        }
        if (count >= 5) {
            return true;
        }
        return false;
    }

    // 开始游戏
    public void start() {
        Scanner scanner = new Scanner(System.in);
        int x, y;
        while (true) {
            // 输出当前棋盘和玩家提示
            printBoard();
            System.out.println("轮到 " + currentPlayer + " 玩家落子，请输入坐标（如：3,4）：");
            // 获取玩家输入的坐标
            String input = scanner.next();
            String[] inputArray = input.split(",");
            x = Integer.parseInt(inputArray[0]) - 1;
            y = Integer.parseInt(inputArray[1]) - 1;
            // 判断坐标是否合法
            if (x < 0 || x >= BOARD_SIZE || y < 0 || y >= BOARD_SIZE || !board[x][y].equals("+")) {
                System.out.println("坐标不合法，请重新输入！");
                continue;
            }
            // 在棋盘上落子
            board[x][y] = currentPlayer;
            // 判断游戏是否结束
            if (isGameOver(x, y)) {
                System.out.println(currentPlayer + " 玩家获胜！");
                break;
            }
            // 切换玩家
            String temp = currentPlayer;
            currentPlayer = opponent;
            opponent = temp;
        }
        scanner.close();
    }

    public static void main(String[] args) {
        Gobang game = new Gobang();
        game.start();
    }
}

这段代码实现了一个简单的双人对战五子棋游戏，玩家可以通过输入坐标来落子，程序会自动判断是否有玩家获胜。注意，这段代码还没有实现悔棋、保存游戏等功能，你可以根据需要进行扩展。