Java date jump to the next 10th minute

Question

I need a fast implementation of a "Date jump" algorithm that is to be included in an event management system.
An event is triggered and sets a date (in a synchronized method) to the next 10th minute.

For instance

  Event occurs at "2010-01-05 13:10:12" and sets the 
  next date to be "2010-01-05 13:20:00"

and if an event occurs exactly (supposedly) at a 10th minute, the next one must be set

  Event occurs at "2010-01-05 13:30:00" and sets the 
  next date to be "2010-01-05 13:40:00"

(unlikely since the date goes down to the 1/1000th of a second, but just in case...).

My first idea would be to get the current Date() and work directly with the ms from the getTime() method, via integer (long) division, like ((time / 10mn)+1)*10mn.

Since it has to be fast, and also reliable, I thought I'll ask my fellow OSers prior to the implementation.

Answer 1

You can use / adapt my answer to a very similar question:

How to round time to the nearest quarter in java?

Something like this:

int unroundedMinutes = calendar.get(Calendar.MINUTE);
int mod = unroundedMinutes % 10;
calendar.add(Calendar.MINUTE, mod == 0 ? 10 : 10 - mod);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);