时区公式

Question

我正在做一个练习，我需要根据时区的不同来计算小时，所以我基本上想出了以下代码：

System.out.print("What is the time difference, in hours, between your home and your destination? ");
    Scanner input = new Scanner(System.in);
    int hoursDif = input.nextInt();
    input.nextLine();
    int mid;
    if (hoursDif < 0){
        mid = 24 + hoursDif;
    }
    else{
        mid = hoursDif;
    }
    int noon;
    if (hoursDif+12 < 24){
        noon = hoursDif + 12;
    }
    else{
        noon = hoursDif + 12 +- 24;
    }
    System.out.print("That means that when it is midnight at home it will be " + mid + ":00 and noon: " + noon);

但是问题是，该课程才刚刚开始，还没有看到循环，所以有人知道是否有一种方法可以获取相同的输出，但是没有if语句吗？

Answer 1

使用适当的LocalDateTime对象，这非常简单。

System.out.print("What is the time difference, in hours, between your home and your destination? ");
Scanner input = new Scanner(System.in);
int hoursDif = input.nextInt();
LocalDateTime localDateTime = LocalDateTime.now();
int mid = localDateTime.truncatedTo(ChronoUnit.DAYS).plusHours(hoursDif).getHour();
int noon = localDateTime.truncatedTo(ChronoUnit.DAYS).plusHours(12).plusHours(hoursDif).getHour();
System.out.print("That means that when it is midnight at home it will be " + mid + ":00 and noon: " + noon);

您仅获得当前时间，将其截断为DAYS（因此为00:00:00），然后添加您输入的时间。