匹配的游戏程序没有控制台输出？

Question

基本上，项目描述要求用户创建一个配对游戏，包括：

二维打法table（4x4），16对匹配牌，运行宁数面朝下的牌数。包含一种方法，用于从 table 的输入 x,y 位置检索特定卡片。
A gameBoard，并循环播放直到所有牌都面朝上。
该循环包括一个界面，用户可以选择两张牌（输入 x,y table 位置），检查两张牌是否相等，减少 faceDown 张牌的数量，并设置 faceUp boolean 张牌。

本质上，程序应该运行直到所有的牌都面朝上，并且游戏获胜。我将我的程序分成下面四个单独的 classes。

1.

public class Card {
    private final int cardValue;
    private boolean faceUp;

    public Card(int value) {
        cardValue = value;
        faceUp = false;
    }

    public int getValue() {
        return cardValue;
    }

    public boolean isFaceUp() {
        return faceUp;
    }

    public void setFaceUp(boolean input) {
        faceUp = input;
    }

    public static void printBoard(Card[][] cards) {
        System.out.println("\t\t1\t2\t3\t4");
        System.out.println("\t____________");

        for(int i = 0; i < cards.length; i++) {
            System.out.println((i + 1) + "\t|\t");

            for(int j = 0; j < cards[0].length; j++)
                if(cards[i][j].isFaceUp()) {
                    System.out.print(cards[i][j].getValue() + "\t"); }
                else
                    System.out.println("*\t");

        }
        System.out.println();
    }

}

2.

public class CreateBoard {

public static Card[][] createBoard() {
    Card[][] board = new Card[4][4];

    for(int i = 1; i <= 8; i++) {
        for(int j = 1; j <= 2; j++) {

            boolean boardLocation = false;

            while(!boardLocation) {
                int row = (int)(Math.random() * 4); 
                int column = (int)(Math.random() * 4);

                if(board[row] == null && board[column] == null) {
                    boardLocation = true;
                    board[row][column] = new Card(i);
                    }
                }
            }
        }
                return board;
    }
}

3.

public class Game {
    public static boolean wonGame(Card[][] board) {
        for(int i = 0; i < board.length; i++) {
            for(int j = 0; j < board[0].length; j++) {
                if(!board[i][j].isFaceUp())
                    return false;
            }
        }
                    return true;
    }

}

最后，主要 class:

public class GameDriver {
    public static void main(String[] args) {
        Card[][] board = CreateBoard.createBoard();
        Scanner keyboard = new Scanner(System.in);

        System.out.println("Starting Game...");

        while(!Game.wonGame(board)) {
            Card.printBoard(board);

            System.out.println("Enter X-Coordinate #1 (1-4): ");
            int column1 = keyboard.nextInt();

            System.out.println("Enter Y-Coordinate #1 (1-4): ");
            int row1 = keyboard.nextInt();

            System.out.println("Enter X-Coordinate #2 (1-4): ");
            int column2 = keyboard.nextInt();

            System.out.println("Enter Y-Coordinate #2 (1-4): ");
            int row2 = keyboard.nextInt();

            Card card1 = board[row1][column1];
            Card card2 = board[row2][column2];

            if(card1.getValue() == card2.getValue() && !(row1 == row2 && column1 == column2)) 
            {
                card1.setFaceUp(true);
                card2.setFaceUp(true);
            }

            else if(row1 == row2 && column1 == column2)
            {
                System.out.println("Points selected are the same, try again");
            }

            else
            {
                System.out.println(card1.getValue() + " and "  + card2.getValue() + " do not match");

            }
        }
            Card.printBoard(board);
    }
}

代码似乎运行没问题，没有任何错误。然而，经过多次测试，最明显的问题是它没有向控制台输出任何东西……我是不是漏掉了什么？帮助将不胜感激！

Answer 1

创建板应该是

public class CreateBoard {

public static Card[][] createBoard() {
    Card[][] board = new Card[4][4];

    for(int i = 1; i <= 8; i++) {
        for(int j = 1; j <= 2; j++) {

            boolean boardLocation = false;

            while(!boardLocation) {
                int row = (int)(Math.random() * 4); 
                int column = (int)(Math.random() * 4);

                if(board[row][column] == null) {
                    boardLocation = true;
                    board[row][column] = new Card(i);
                    }
                }
            }
        }
                return board;
    }
}

而对于游戏 class，由于 java 数组索引从 0 开始，因此这些行应该是

Card card1 = board[row1-1][column1-1];
Card card2 = board[row2-1][column2-1];

匹配的游戏程序没有控制台输出？

Matching game program provides no output from console?

java

while-loop

println