java代码双人对战五子棋实现悔棋、保存、认输游戏功能

以下是一个简单的 Java 代码实现，实现了双人对战五子棋的悔棋、保存、认输游戏功能。

import java.util.Scanner;

public class FiveInRow {
    private static final int BOARD_SIZE = 15;
    private static final char PLAYER1 = 'X';
    private static final char PLAYER2 = 'O';
    private static final char EMPTY = '.';
    private static final int MAX_UNDO = 5;

    private char[][] board = new char[BOARD_SIZE][BOARD_SIZE];
    private boolean player1Turn = true;
    private int undoCount = 0;

    public FiveInRow() {
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                board[i][j] = EMPTY;
            }
        }
    }

    public void play() {
        Scanner scanner = new Scanner(System.in);
        boolean gameOver = false;
        while (!gameOver) {
            drawBoard();
            char player = player1Turn ? PLAYER1 : PLAYER2;
            System.out.println("Player " + player + "'s turn.");
            System.out.print("Enter row (1-" + BOARD_SIZE + "): ");
            int row = scanner.nextInt() - 1;
            System.out.print("Enter column (1-" + BOARD_SIZE + "): ");
            int col = scanner.nextInt() - 1;
            if (isValidMove(row, col)) {
                makeMove(row, col, player);
                if (isWinningMove(row, col)) {
                    gameOver = true;
                    System.out.println("Player " + player + " wins!");
                } else if (isBoardFull()) {
                    gameOver = true;
                    System.out.println("Game over! The board is full.");
                } else {
                    player1Turn = !player1Turn;
                }
            } else {
                System.out.println("Invalid move. Please try again.");
            }
        }
    }

    private void drawBoard() {
        System.out.print("  ");
        for (int i = 0; i < BOARD_SIZE; i++) {
            System.out.print((i + 1) + " ");
        }
        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();
        }
    }

    private boolean isValidMove(int row, int col) {
        if (row < 0 || row >= BOARD_SIZE || col < 0 || col >= BOARD_SIZE) {
            return false;
        }
        return board[row][col] == EMPTY;
    }

    private void makeMove(int row, int col, char player) {
        board[row][col] = player;
        undoCount++;
    }

    private void undoMove(int row, int col) {
        board[row][col] = EMPTY;
        undoCount--;
    }

    private boolean isWinningMove(int row, int col) {
        // Check horizontal
        int count = 0;
        for (int i = Math.max(0, col - 4); i <= Math.min(BOARD_SIZE - 1, col + 4); i++) {
            if (board[row][i] == board[row][col]) {
                count++;
            } else {
                count = 0;
            }
            if (count == 5) {
                return true;
            }
        }
        // Check vertical
        count = 0;
        for (int i = Math.max(0, row - 4); i <= Math.min(BOARD_SIZE - 1, row + 4); i++) {
            if (board[i][col] == board[row][col]) {
                count++;
            } else {
                count = 0;
            }
            if (count == 5) {
                return true;
            }
        }
        // Check diagonal
        count = 0;
        for (int i = -4; i <= 4; i++) {
            int r = row + i;
            int c = col + i;
            if (r >= 0 && r < BOARD_SIZE && c >= 0 && c < BOARD_SIZE) {
                if (board[r][c] == board[row][col]) {
                    count++;
                } else {
                    count = 0;
                }
                if (count == 5) {
                    return true;
                }
            }
        }
        // Check anti-diagonal
        count = 0;
        for (int i = -4; i <= 4; i++) {
            int r = row + i;
            int c = col - i;
            if (r >= 0 && r < BOARD_SIZE && c >= 0 && c < BOARD_SIZE) {
                if (board[r][c] == board[row][col]) {
                    count++;
                } else {
                    count = 0;
                }
                if (count == 5) {
                    return true;
                }
            }
        }
        return false;
    }

    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;
    }

    public void undo() {
        if (undoCount < MAX_UNDO) {
            Scanner scanner = new Scanner(System.in);
            System.out.print("Enter row (1-" + BOARD_SIZE + ") to undo: ");
            int row = scanner.nextInt() - 1;
            System.out.print("Enter column (1-" + BOARD_SIZE + ") to undo: ");
            int col = scanner.nextInt() - 1;
            if (board[row][col] != EMPTY) {
                undoMove(row, col);
                player1Turn = !player1Turn;
                System.out.println("Undo successful.");
            } else {
                System.out.println("There is no piece to undo at that location.");
            }
        } else {
            System.out.println("You have reached the maximum number of undos.");
        }
    }

    public void save() {
        // TODO: Implement save function
        System.out.println("Save function not implemented.");
    }

    public void forfeit() {
        char player = player1Turn ? PLAYER1 : PLAYER2;
        System.out.println("Player " + player + " forfeits!");
        player1Turn = !player1Turn;
    }

    public static void main(String[] args) {
        FiveInRow game = new FiveInRow();
        Scanner scanner = new Scanner(System.in);
        boolean quit = false;
        while (!quit) {
            System.out.println("--------------------");
            System.out.println("1. New game");
            System.out.println("2. Undo move");
            System.out.println("3. Save game");
            System.out.println("4. Forfeit game");
            System.out.println("5. Quit game");
            System.out.print("Enter choice (1-5): ");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    game = new FiveInRow();
                    game.play();
                    break;
                case 2:
                    game.undo();
                    break;
                case 3:
                    game.save();
                    break;
                case 4:
                    game.forfeit();
                    break;
                case 5:
                    quit = true;
                    System.out.println("Thanks for playing!");
                    break;
                default:
                    System.out.println("Invalid choice. Please try again.");
                    break;
            }
        }
    }
}

该代码使用了一个 `FiveInRow` 类来实现游戏逻辑。`play` 方法用于循环进行游戏，每次循环中先绘制棋盘，然后根据当前玩家的回合提示输入行和列，再检查输入的位置是否合法，如果合法则落子并检查是否获胜或平局，否则提示重新输入。`drawBoard` 方法用于绘制棋盘，`isValidMove` 方法用于检查输入的位置是否合法，`makeMove` 方法用于落子，`isWinningMove` 方法用于检查是否获胜，`isBoardFull` 方法用于检查棋盘是否已满。游戏过程中还提供了 `undo`、`save` 和 `forfeit` 方法实现悔棋、保存和认输游戏功能。

在 `main` 方法中，使用一个循环来显示菜单，根据用户的选择调用相应的方法。