java - 双重增强 for 循环以在 boolean 值 [] [] 中计数？

Question

我应该创建一个带有返回值的方法，该方法使用双增强 for 循环来计算二维 boolean 数组(电影院的座位安排)中的假值数量。由于 return 语句存在问题，程序将无法运行。

这是我的代码:

public static byte emptySeats(boolean[][] cinemaSeats) {
    int availableSeats = 0;
    int rowLength = cinemaSeats.length;
    int seatLength = cinemaSeats[0].length;

    for (boolean[] radNr : cinemaSeats) {
        rowLength--;
        for (boolean[] seteNr : cinemaSeats) {
            seatLength--;
            if (!cinemaSeats[rowLength][seatLength]) {
                availableSeats++;
            }
        }
    }
    return availableSeats;
}

Answer 1

这将遍历数组中的每个元素，搜索错误值并相应地添加到总数中:

public static int emptySeats(boolean[][] cinemaSeats) {
    int availableSeats = 0;
    for (int y = 0; y < cinemaSeats.length; y++)
        for (int x = 0; x < cinemaSeats[y].length; x++)
            if (!cinemaSeats[y][x]) availableSeats++;
    return availableSeats;
}

这是使用增强的 for 循环的类似解决方案:

public static int emptySeats(boolean[][] cinemaSeats) {
    int availableSeats = 0;
    for (boolean[] row : cinemaSeats)
        for (boolean seat : row)
            if (!seat) availableSeats++;
    return availableSeats;
}