你可以帮我写一个五子棋的Java代码么

当然可以，以下是一个简单的五子棋Java代码：

import java.util.Scanner;

public class FiveChess {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // 初始化棋盘
        int[][] board = new int[15][15];
        int player = 1; // 1表示黑子，2表示白子
        boolean win = false;
        while (!win) {
            // 打印棋盘
            printBoard(board);
            // 输入行列坐标
            System.out.print("玩家" + player + "请输入行列坐标：");
            int row = sc.nextInt();
            int col = sc.nextInt();
            // 判断输入是否合法
            if (row >= 0 && row < 15 && col >= 0 && col < 15 && board[row][col] == 0) {
                board[row][col] = player; // 在棋盘上放子
                // 判断胜负
                if (checkWin(board, row, col)) {
                    win = true;
                    System.out.println("恭喜玩家" + player + "获胜！");
                }
                // 切换玩家
                player = player == 1 ? 2 : 1;
            } else {
                System.out.println("输入不合法，请重新输入！");
            }
        }
        // 打印最终棋盘
        printBoard(board);
    }

    // 打印棋盘
    public static void printBoard(int[][] board) {
        for (int i = 0; i < board.length; i++) {
            for (int j = 0; j < board[i].length; j++) {
                System.out.print(board[i][j] == 0 ? "+ " : (board[i][j] == 1 ? "● " : "○ "));
            }
            System.out.println();
        }
    }

    // 判断胜负
    public static boolean checkWin(int[][] board, int row, int col) {
        int player = board[row][col];
        int count = 0;
        // 水平方向
        for (int i = col - 4; i <= col + 4; i++) {
            if (i >= 0 && i + 4 < 15 && board[row][i] == player && board[row][i + 1] == player && board[row][i + 2] == player && board[row][i + 3] == player && board[row][i + 4] == player) {
                return true;
            }
        }
        // 垂直方向
        for (int i = row - 4; i <= row + 4; i++) {
            if (i >= 0 && i + 4 < 15 && board[i][col] == player && board[i + 1][col] == player && board[i + 2][col] == player && board[i + 3][col] == player && board[i + 4][col] == player) {
                return true;
            }
        }
        // 左上到右下方向
        for (int i = row - 4, j = col - 4; i <= row + 4 && j <= col + 4; i++, j++) {
            if (i >= 0 && i + 4 < 15 && j >= 0 && j + 4 < 15 && board[i][j] == player && board[i + 1][j + 1] == player && board[i + 2][j + 2] == player && board[i + 3][j + 3] == player && board[i + 4][j + 4] == player) {
                return true;
            }
        }
        // 左下到右上方向
        for (int i = row + 4, j = col - 4; i >= row - 4 && j <= col + 4; i--, j++) {
            if (i >= 0 && i - 4 < 15 && j >= 0 && j + 4 < 15 && board[i][j] == player && board[i - 1][j + 1] == player && board[i - 2][j + 2] == player && board[i - 3][j + 3] == player && board[i - 4][j + 4] == player) {
                return true;
            }
        }
        return false;
    }
}

该代码实现了一个简单的人人对战的五子棋游戏。你可以根据自己的需要进行修改和扩展。