用java编写五子棋小游戏

好的，以下是一个简单的五子棋小游戏的Java代码示例：

import java.util.Scanner;

public class FiveInARow {
    private static final int BOARD_SIZE = 15; // 棋盘大小
    private static final char EMPTY = ' '; // 空格
    private static final char BLACK = 'X'; // 黑子
    private static final char WHITE = 'O'; // 白子

    private char[][] board; // 棋盘
    private char currentPlayer; // 当前玩家

    public FiveInARow() {
        board = new char[BOARD_SIZE][BOARD_SIZE];
        currentPlayer = BLACK; // 黑子先手
        initBoard();
    }

    // 初始化棋盘
    private void initBoard() {
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                board[i][j] = EMPTY;
            }
        }
    }

    // 显示棋盘
    private void displayBoard() {
        System.out.print("  ");
        for (int i = 0; i < BOARD_SIZE; i++) {
            System.out.print((char)('A' + i) + " ");
        }
        System.out.println();

        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();
        }
    }

    // 下棋
    private boolean makeMove(int row, int col) {
        if (row >= 0 && row < BOARD_SIZE && col >= 0 && col < BOARD_SIZE && board[row][col] == EMPTY) {
            board[row][col] = currentPlayer;
            return true;
        }
        return false;
    }

    // 判断胜负
    private boolean checkWin(int row, int col) {
        int count = 0;

        // 横向
        for (int i = 0; i < 5; i++) {
            if (col - i >= 0 && col - i + 4 < BOARD_SIZE && board[row][col - i] == currentPlayer
                    && board[row][col - i + 1] == currentPlayer
                    && board[row][col - i + 2] == currentPlayer
                    && board[row][col - i + 3] == currentPlayer
                    && board[row][col - i + 4] == currentPlayer) {
                count++;
            }
        }

        // 竖向
        for (int i = 0; i < 5; i++) {
            if (row - i >= 0 && row - i + 4 < BOARD_SIZE && board[row - i][col] == currentPlayer
                    && board[row - i + 1][col] == currentPlayer
                    && board[row - i + 2][col] == currentPlayer
                    && board[row - i + 3][col] == currentPlayer
                    && board[row - i + 4][col] == currentPlayer) {
                count++;
            }
        }

        // 左上到右下
        for (int i = 0; i < 5; i++) {
            if (row - i >= 0 && row - i + 4 < BOARD_SIZE && col - i >= 0 && col - i + 4 < BOARD_SIZE
                    && board[row - i][col - i] == currentPlayer
                    && board[row - i + 1][col - i + 1] == currentPlayer
                    && board[row - i + 2][col - i + 2] == currentPlayer
                    && board[row - i + 3][col - i + 3] == currentPlayer
                    && board[row - i + 4][col - i + 4] == currentPlayer) {
                count++;
            }
        }

        // 左下到右上
        for (int i = 0; i < 5; i++) {
            if (row + i < BOARD_SIZE && row + i - 4 >= 0 && col - i >= 0 && col - i + 4 < BOARD_SIZE
                    && board[row + i][col - i] == currentPlayer
                    && board[row + i - 1][col - i + 1] == currentPlayer
                    && board[row + i - 2][col - i + 2] == currentPlayer
                    && board[row + i - 3][col - i + 3] == currentPlayer
                    && board[row + i - 4][col - i + 4] == currentPlayer) {
                count++;
            }
        }

        return count > 0;
    }

    // 切换玩家
    private void switchPlayer() {
        if (currentPlayer == BLACK) {
            currentPlayer = WHITE;
        } else {
            currentPlayer = BLACK;
        }
    }

    // 游戏主流程
    public void play() {
        Scanner scanner = new Scanner(System.in);
        int row, col;

        while (true) {
            displayBoard();

            System.out.print(currentPlayer + " Player's turn. Enter your move: ");
            String move = scanner.nextLine().toUpperCase();
            if (move.equals("QUIT")) {
                System.out.println("Game over.");
                return;
            }

            col = move.charAt(0) - 'A';
            row = Integer.parseInt(move.substring(1)) - 1;

            if (makeMove(row, col)) {
                if (checkWin(row, col)) {
                    displayBoard();
                    System.out.println(currentPlayer + " Player wins!");
                    return;
                } else if (isBoardFull()) {
                    displayBoard();
                    System.out.println("Game ends in a tie!");
                    return;
                } else {
                    switchPlayer();
                }
            } else {
                System.out.println("Invalid move. Try again.");
            }
        }
    }

    // 判断棋盘是否已满
    private boolean isBoardFull() {
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                if (board[i][j] == EMPTY) {
                    return false;
                }
            }
        }
        return true;
    }

    // 启动游戏
    public static void main(String[] args) {
        FiveInARow game = new FiveInARow();
        game.play();
    }
}

这个五子棋小游戏是控制台应用程序，运行后会提示玩家输入落子的位置，例如：A1 表示第一行第一列。

注意：这只是一个简单的五子棋小游戏示例，还有很多优化和改进的空间。