Java：五子棋游戏代码

以下是一个简单的五子棋游戏的 Java 代码：

import java.util.Scanner;

public class FiveInARow {
    private static final int ROWS = 15;
    private static final int COLS = 15;
    private static final int EMPTY = 0;
    private static final int PLAYER1 = 1;
    private static final int PLAYER2 = 2;
    private static int[][] board = new int[ROWS][COLS];

    public static void main(String[] args) {
        int player = PLAYER1;
        Scanner scanner = new Scanner(System.in);
        while (true) {
            printBoard();
            System.out.print("Player " + player + ", enter row and column (e.g. 3 5): ");
            int row = scanner.nextInt();
            int col = scanner.nextInt();
            if (makeMove(row, col, player)) {
                System.out.println("Player " + player + " wins!");
                printBoard();
                break;
            }
            player = (player == PLAYER1) ? PLAYER2 : PLAYER1;
        }
        scanner.close();
    }

    private static boolean makeMove(int row, int col, int player) {
        board[row][col] = player;
        int count = 1;

        // check horizontal
        for (int c = col - 1; c >= 0 && board[row][c] == player; c--)
            count++;
        for (int c = col + 1; c < COLS && board[row][c] == player; c++)
            count++;
        if (count >= 5)
            return true;

        // check vertical
        count = 1;
        for (int r = row - 1; r >= 0 && board[r][col] == player; r--)
            count++;
        for (int r = row + 1; r < ROWS && board[r][col] == player; r++)
            count++;
        if (count >= 5)
            return true;

        // check diagonal (top-left to bottom-right)
        count = 1;
        for (int r = row - 1, c = col - 1; r >= 0 && c >= 0 && board[r][c] == player; r--, c--)
            count++;
        for (int r = row + 1, c = col + 1; r < ROWS && c < COLS && board[r][c] == player; r++, c++)
            count++;
        if (count >= 5)
            return true;

        // check diagonal (bottom-left to top-right)
        count = 1;
        for (int r = row + 1, c = col - 1; r < ROWS && c >= 0 && board[r][c] == player; r++, c--)
            count++;
        for (int r = row - 1, c = col + 1; r >= 0 && c < COLS && board[r][c] == player; r--, c++)
            count++;
        if (count >= 5)
            return true;

        return false;
    }

    private static void printBoard() {
        for (int r = 0; r < ROWS; r++) {
            for (int c = 0; c < COLS; c++) {
                if (board[r][c] == EMPTY)
                    System.out.print(".");
                else if (board[r][c] == PLAYER1)
                    System.out.print("X");
                else if (board[r][c] == PLAYER2)
                    System.out.print("O");
            }
            System.out.println();
        }
    }
}

这个程序使用一个二维数组 `board` 来存储棋盘上的状态，使用常量 `EMPTY`、`PLAYER1`、`PLAYER2` 来表示空、玩家1、玩家2的棋子。`makeMove` 方法用来检查每一个新落子是否构成五子连珠，使用四个循环分别检查水平、竖直、左上到右下和右上到左下方向上的连珠情况。`printBoard` 方法用来打印当前的棋盘状态。程序使用一个 `while` 循环来不断交替让两个玩家下棋，直到某一方获胜。