在java中添加两个字符串时间

Question

我有两个字符串时间

1:30:00
1:35:00

是否有一种简单的方法来添加这两次并获得一个新的时间应该是什么 3:05:00？

我想在客户端这样做,所以如果我可以避免任何日期的liabraries

Answer 1

请记住,您可以将小时/分钟/秒的int值转换为单个int,如下所示:

int totalSeconds = ((hours * 60) + minutes) * 60 + seconds;

并转换回来:

int hours = totalSeconds / 3600;  // Be sure to use integer arithmetic
int minutes = ((totalSeconds) / 60) % 60;
int seconds = totalSeconds % 60;

或者你可以按如下方式逐步进行算术:

int totalHours = hours1 + hours2;
int totalMinutes = minutes1 + minutes2;
int totalSeconds = seconds1 + seconds2;
if (totalSeconds >= 60) {
  totalMinutes ++;
  totalSeconds = totalSeconds % 60;
}
if (totalMinutes >= 60) {
  totalHours ++;
  totalMinutes = totalMinutes % 60;
}

Answer 2

String time1="0:01:30";
String time2="0:01:35";

SimpleDateFormat timeFormat = new SimpleDateFormat("HH:mm:ss");
timeFormat.setTimeZone(TimeZone.getTimeZone("UTC"));

Date date1 = timeFormat.parse(time1);
Date date2 = timeFormat.parse(time2);

long sum = date1.getTime() + date2.getTime();

String date3 = timeFormat.format(new Date(sum));
System.out.println("The sum is "+date3);

Ouput： The sum is 00:03:05