用Java写个五子棋游戏

好的，下面是一份简单的 Java 代码，实现了五子棋游戏：

import java.util.Scanner;

public class Wuziqi {
    static char[][] board = new char[19][19];
    static Scanner scan = new Scanner(System.in);
    static boolean flag = true;

    public static void main(String[] args) {
        initBoard();
        while (true) {
            showBoard();
            System.out.print("请输入您下棋的坐标：");
            int x = scan.nextInt();
            int y = scan.nextInt();
            if (x < 0 || x >= 19 || y < 0 || y >= 19) {
                System.out.println("输入坐标不合法，请重新输入！");
                continue;
            }
            if (board[x][y] != '+') {
                System.out.println("该位置已经有棋子了，请重新输入！");
                continue;
            }
            if (flag) {
                board[x][y] = 'X';
            } else {
                board[x][y] = 'O';
            }
            flag = !flag;
            if (checkWin(x, y)) {
                System.out.println("恭喜，游戏胜利！");
                break;
            }
        }
        scan.close();
    }

    public static void initBoard() {
        for (int i = 0; i < 19; i++) {
            for (int j = 0; j < 19; j++) {
                board[i][j] = '+';
            }
        }
    }

    public static void showBoard() {
        System.out.println("  A B C D E F G H I J K L M N O P Q R S");
        for (int i = 0; i < 19; i++) {
            System.out.print((i + 1) + " ");
            for (int j = 0; j < 19; j++) {
                System.out.print(board[i][j] + " ");
            }
            System.out.println();
        }
    }

    public static boolean checkWin(int x, int y) {
        char cur = board[x][y];
        int count = 0;
        for (int i = x; i >= 0; i--) {
            if (board[i][y] != cur) {
                break;
            }
            count++;
        }
        for (int i = x + 1; i < 19; i++) {
            if (board[i][y] != cur) {
                break;
            }
            count++;
        }
        if (count >= 5) {
            return true;
        }

        count = 0;