Time plus minutes

Question

I have a bunch of data containing a time value, e.g. 09:30am, and a duration, either 15,30,45 or 60. What would be the best way of getting the end time from these values? Will it be some use of a Date / Calendar or would just a custom function be quicker to do?

so if you have duration 60 and time `09:30am` result should be `09:31am`, right? — Maxim Shoustin, Oct 15 '13 at 15:17

score 1 · Accepted Answer · edited Oct 15 '13 at 16:13

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The Joda Time library (http://www.joda.org/joda-time/) is popular, easy to work with, and handles these kinds of calculations in a straight-forward manner.

DateTime start = new DateTime(2013, 10, 15, 9, 30); // create a DateTime representing Oct 15, 2013 at 9:30
Duration dur = Duration.standardMinutes(15); // create a duration of 15 minutes
DateTime calc = start.plus(dur); // add; result is 9:45 on 10/15/2013

edited Oct 15 '13 at 16:13

weston

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answered Oct 15 '13 at 15:20

Matthew Burke

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I'll take a look at Joda now, I've seen a few people mentioning it. – TMH Oct 15 '13 at 15:26

score 1 · Answer 2 · answered Oct 15 '13 at 16:23

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The standard java/android way for this is to use a calendar:

    final Calendar c = Calendar.getInstance(); // now

    c.add(Calendar.DAY_OF_MONTH, 10); // add 10 days

There are other constants if you want to add minutues, years, seconds, ....

answered Oct 15 '13 at 16:23

k3b

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score 0 · Answer 3 · edited May 23 '17 at 12:05

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Check out this solution: Java string to date conversion

You may need to change the "MMMM d, yyyy" portion to fit your data set.

Here is the Javadoc: http://developer.android.com/reference/java/text/SimpleDateFormat.html

edit: For the second part of your question, there are several questions on here about how to add to a Date/Calendar object.

edited May 23 '17 at 12:05

Community

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answered Oct 15 '13 at 15:17

telkins

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Time plus minutes

3 Answers3