Sort Intervals in Joda-Time

Question

I have list of Joda-Time Interval objects.

List<Interval> intervals = new ArrayList<Interval>();

How can I sort the intervals on the beginning Date of each interval. The intervals are not overlapping

score 19 · Accepted Answer · answered Jun 07 '13 at 14:47

Just create a Comparator<Interval> which compares by start times:

public class IntervalStartComparator implements Comparator<Interval> {
    @Override
    public int compare(Interval x, Interval y) {
        return x.getStart().compareTo(y.getStart());
    }
}

Then sort using that:

Collections.sort(intervals, new IntervalStartComparator());

score 0 · Answer 2 · answered Jun 07 '13 at 14:52

0

In your special case, collect the start instants using

interval.getStart()

in another list. DateTime using the Comparable interface which makes the list sortable using Collections.sort(..).

answered Jun 07 '13 at 14:52

Jens Birger Hahn

909
5
5

That will sort the start times, but it won't sort the *intervals* based on their start times. – Jon Skeet Jun 07 '13 at 14:55
@JonSkeet: Your solution is actually much better :-) - I must read the questions more carefully... – Jens Birger Hahn Jun 07 '13 at 14:58

Sort Intervals in Joda-Time

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