Question

我试图编写一个程序，通过给出一个数字来计算一周中的几天。我想写这个不使用Arrays。，或枚举类型，只是方法我该怎么做？我也希望能够将一周中的某一天设定为起点。

谢谢

public static void main(String[] args);
 {
  int sunday, monday, tuesday, wednesday, thursday, friday, saturday;
  int week;
  int day;

  System.out.println(" Day of the week is" + day);

  public void count()


  public void week()

  public void printday()

  public void nextday()

  public void previousday()

我不是最好的，但我认为练习是完美的

Answer 1

这看起来像是家庭作业，但如果你不打算使用天数，我猜你可以使用switch语句和一周中的日子。

此特定样本从第3天（0为星期一）到第14天进行迭代。

for (int i = 3; i < 15; i++) {
    String s = null;
    switch (i % 7) {
        case 0: s = "Monday"; break;
        case 1: s = "Tuesday"; break;
        case 2: s = "Wednesday"; break;
        case 3: s = "Thursday"; break;
        case 4: s = "Friday"; break;
        case 5: s = "Saturday"; break;
        case 6: s = "Sunday"; break;
    }
    System.out.println(s);
}

Answer 2

如果我正确理解你的问题，这应该是你的伎俩：）

/**
 *
 * @param startingDay
 *            - day of the week starting point ( need to be between 0-6 )
 * @param noDays
 *            number of days to count
 * @return result Day of the week
 */
private static String getWeekDay(int startingDay, int noDays) {
    int dayNr = noDays % 7;
    int finalDayNr = (startingDay + dayNr) % 7;
    return getDay(finalDayNr);
}

private static String getDay(int dayNr) {
    switch (dayNr) {
    case 0:
        return "SUNDAY";
    case 1:
        return "MONDAY";
    case 2:
        return "TUESDAY";
    case 3:
        return "WEDNESDAY";
    case 4:
        return "THURSDAY";
    case 5:
        return "FRIDAY";
    case 6:
        return "SATURDAY";
    }
    throw new IllegalArgumentException("Wrong input. Day nr must be between 0-6.");
}

并且没有ENUM的版本，但Enum版本是可取的......从您可能想到的任何角度来看。

public static void main(String[] args) {
    System.out.println(getWeekDay(0, 15));
    System.out.println(getWeekDay(1, 15));
    System.out.println(getWeekDay(5, 3));
}

使用示例（针对这两种方法中的任何一种）：

{{1}}

Answer 3

public static void main(String[] args) {

    int day = 1;

    System.out.println(isWeek(day));
    printday(day);

}

public static boolean isWeek(int day) {
    // Sunday or Saturday
    if (day == 1 || day == 7) {
        return false;
    }

    return true;
}

public static void printday(int day) {
    switch (day) {
    case 1:
        System.out.println("Sunday");
        break;
    case 2:
        System.out.println("Monday");
        break;
    // Until Saturday

    default:
        break;
    }
}

代码错误，但没有那样的数组或枚举？

处理一周中的几天

3 个答案: