Question

I’d like set a java.util.Date-Objekt to its minimum or maximum time values for a Date (one day).
The way I do it currently (for minimum):

Calendar cal = Calendar.getInstance();
cal.setTime(aDate);
cal.set(Calendar.HOUR, 0);
//... same for minutes, seconds, milliseconds

But this seems a little bit cumbersome. And how do I set the maximum?

Answer 1

Yeah, use JodaTime’s DateMidnight class, as others have suggested.

Or if you can’t switch to JodaTime, use DateUtils.truncate(Date, field) and the DateUtils.addXyz() methods from Commons Lang:

Date lastMidnight = DateUtils.truncate(new Date(), Calendar.DATE);
Date endOfToday = DateUtils.addMilliseconds(
                      DateUtils.addDays(lastMidnight, 1), -1);