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Comparator & Comparable

Arun Prasath
Ranch Hand

Joined: May 23, 2007
Posts: 80

Could anyone tell me what is the difference between Comparator & Comparable interfaces? when do we use it?
Joe Ess

Joined: Oct 29, 2001
Posts: 9189


This interface imposes a total ordering on the objects of each class that implements it.

A comparison function, which imposes a total ordering on some collection of objects. Comparators can be passed to a sort method (such as Collections.sort or Arrays.sort) to allow precise control over the sort order.

[ May 14, 2008: Message edited by: Joe Ess ]

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Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46397
A similar question came up last year: here.
I agree. Here's the link:
subject: Comparator & Comparable
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