How do i format a java.time.Duration mm:ss

Question

I have a java.time.Duration and I want to output it in the form of mm:ss. It doesnt seem possible to use DateTimeFormatter since that only accepts LocalTime, ZonedTIme ectera

So I did it like this, works fine for 90 seconds give 1:30, but for 66 seconds gives 1:6 whereas I want 1:06

Duration duration = Duration.ofSeconds(track.getLength().longValue());
System.out.println(duration.toMinutes() + ":" + duration.minusMinutes(duration.toMinutes()).getSeconds());

assylias · Accepted Answer · 2015-02-23T16:53:53.307

16

You could create a LocalTime representing the duration from midnight (00:00) and use a DateTimeFormatter:

LocalTime t = LocalTime.MIDNIGHT.plus(duration);
String s = DateTimeFormatter.ofPattern("m:ss").format(t);

Note that this will only work for durations less than one hour.

edited Feb 23 '15 at 16:53

answered Feb 23 '15 at 13:57

assylias

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If you go beyond 24 hours then this solution will fail. – Meno Hochschild Feb 23 '15 at 16:46
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@MenoHochschild actually beyond 59:59 minutes. Agreed. – assylias Feb 23 '15 at 16:54

Evgeniy Dorofeev · Answer 2 · 2015-02-23T13:57:33.023

11

try like this

System.out.printf("%d:%02d%n", duration.toMinutes(), duration.minusMinutes(duration.toMinutes()).getSeconds());

or

    String s = String.format("%d:%02d%n", duration.toMinutes(), duration.minusMinutes(duration.toMinutes()).getSeconds());

to format to a String

edited Feb 23 '15 at 13:57

answered Feb 23 '15 at 13:49

Evgeniy Dorofeev

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Thanks, but the output actually needs to go into an html file rather than just be output to System.out, doesnt DateTIme offer a solution. – Paul Taylor Feb 23 '15 at 13:55
thanks, thats works but I ve gone for a solution within the datetime ecosphere – Paul Taylor Feb 23 '15 at 14:30
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For me a much cleaner solution. The "datetime" ecosphere does not handle formatting of durations. – Meno Hochschild Feb 23 '15 at 18:59

How do i format a java.time.Duration mm:ss

2 Answers2

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