用Java写个五子棋游戏，要求简洁

这是一份简洁的五子棋代码：

import java.util.Scanner;

public class Wuziqi {
    static final int ROWS = 15;
    static final int COLS = 15;
    static char[][] board = new char[ROWS][COLS];
    static Scanner input = new Scanner(System.in);

    public static void main(String[] args) {
        for (int i = 0; i < ROWS; i++) {
            for (int j = 0; j < COLS; j++) {
                board[i][j] = '+';
            }
        }
        while (true) {
            System.out.println("请落子，格式为：行,列");
            int x = input.nextInt() - 1;
            int y = input.nextInt() - 1;
            board[x][y] = 'X';
            printBoard();
        }
    }

    static void printBoard() {
        for (int i = 0; i < ROWS; i++) {
            for (int j = 0; j < COLS; j++) {
                System.out.print(board[i][j] + " ");
            }
            System.out.println();
        }
    }
}

代码中用了一个二维数组存储棋盘，通过扫描输入实现玩家下棋，并在每次下棋后打印当前棋盘。