java - 如果条件正常工作，为什么我的 while 循环不能正常工作？

Question

我的 checkWin 方法返回 false，直到在 Connect 4 游戏中将 4 个“跳棋”水平、垂直或对角地放置在我的棋盘数组中，从而出现获胜者。一旦出现获胜者，checkWin 方法将返回 true，最近的 if 语句将进行迭代，打印获胜者，然后终止整个循环(如果我的编码全部正确)。但是，当我运行该程序时，while 循环仅迭代一次，接受一个红色输入，声明红色获胜，然后对黄色执行相同的操作，然后终止。
我在这里缺少什么？
下面是相关代码。
谢谢。

public static void main(String[] args) {
    char[][] board = new char[6][7];
    boolean loop = true;
    // loop to alternate players until there's a winner
    while (loop) {
        printData(board);
        red(board);
        if (checkWin(board) == true) {
            printData(board);
            System.out.print("Red wins!");
            loop = false;
        }
        printData(board);
        yellow(board);
        if (checkWin(board) == true) {
            printData(board);
            System.out.print("Yellow wins!");
            loop = false;
        }
    }
}

public static void printData(char[][] tbl) {
    for (int r = 0; r < tbl.length; r++) {
        for (int c = 0; c < tbl[r].length; c++) {
            if (tbl[r][c] == 0) {
                System.out.print("| ");
            } else {
                System.out.print("|" + tbl[r][c]);
            }
        } // end for col loop
        System.out.println("|");
    } // end for row loop
    System.out.println("---------------");
} // end printData method

public static void red(char[][] f) {
    System.out.println("Place a red checker at column (0-6)");
    Scanner in = new Scanner(System.in);
    int c = in.nextInt();
    for (int i = 5; i >= 0; i--) {
        if (f[i][c] == 0) {
            f[i][c] = 'R';
            break;
        }
    }
}

public static void yellow(char[][] f) {
    System.out.println("Place a yellow checker at column (0-6)");
    Scanner in = new Scanner(System.in);
    int c = in.nextInt();
    for (int i = 5; i >= 0; i--) {
        if (f[i][c] == 0) {
            f[i][c] = 'Y';
            break;
        }
    }
}

// Method to check for a winner. Receives 2-D array as parameter. Returns
// boolean value.
public static boolean checkWin(char[][] b) {
    // Create four boolean variables, one for each set of rows. Initialize
    // all of them to false.
    boolean foundRow = false;
    boolean foundCol = false;
    boolean foundMjrD = false;
    boolean foundMinD = false;

    // Check to see if four consecutive cells in a row match.
    // check rows
    for (int r = 0; r <= 5; r++) {
        for (int c = 0; c <= 3; c++) {
            if (b[r][c] == b[r][c + 1] && b[r][c] == b[r][c + 2] && b[r][c] == b[r][c + 3] && b[r][c] != ' ') {
                foundRow = true;
                break;
            }
        }
    }

    // Check to see if four columns in the same row match
    // check columns
    for (int r = 0; r <= 2; r++) {
        for (int c = 0; c <= 6; c++) {
            if (b[r][c] == b[r + 1][c] && b[r][c] == b[r + 2][c] && b[r][c] == b[r + 3][c] && b[r][c] != ' ') {
                foundCol = true;
                break;
            }
        }
    }

    // Check to see if four diagonals match (top left to bottom right)
    // check major diagonal
    for (int r = 0; r <= 2; r++) {
        for (int c = 0; c <= 3; c++) {
            if (b[r][c] == b[r + 1][c + 1] && b[r][c] == b[r + 2][c + 2] && b[r][c] == b[r + 3][c + 3]
                    && b[r][c] != ' ') {
                foundMjrD = true;
                break;
            }
        }
    }

    // Check to see if four diagonals in the other direction match (top
    // right to bottom left)
    // check minor diagonal
    for (int r = 0; r <= 2; r++) {
        for (int c = 3; c <= 6; c++) {
            if (b[r][c] == b[r + 1][c - 1] && b[r][c] == b[r + 2][c - 2] && b[r][c] == b[r + 3][c - 3]
                    && b[r][c] != ' ') {
                foundMinD = true;
                break;
            }
        }
    }

    // If ONE of the booleans is true, we have a winner.
    // checks boolean for a true
    if (foundRow || foundCol || foundMjrD || foundMinD)
        return true;
    else
        return false;
} // end checkWin method

Answer 1

根据我通过调试代码进行的分析，在将 boolean 变量切换为 false 后，您尚未将其设置为“true”。当您摆脱这种状况后，再次将该 boolean 变量设置为“true”。

愿这对您有帮助。快乐编码