How to sort a list of objects?

Question

I have a list of objects that I want to sort according to their "date" attribute. Each object has a Date attribute which specifies its age. How can I sort these objects from the newest to the oldest? I heard of Comparator but I don't know if it applies to dates.

Can somebody help me figure out how to do that?

It does. Your comparator should simply take two dates and return appropriate values if one is before the other — kolossus, Jul 29 '14 at 14:50
Date myDate1 = new Date(); Date myDate2 = new Date(); myDate1.compare(myDate2) will return a value between -1 and 1 to indicate with one if for the other or if they are equals (0). — Rene M., Jul 29 '14 at 14:53
the accepted answer for the duplicated question addresses this exact case. — путин некультурная свинья, Jul 29 '14 at 14:55

score 0 · Answer 1 · answered Jul 29 '14 at 14:52

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You can use the various methods of before(), after(), compareTo(), or convert the value into a Long and then compare that instead.

http://docs.oracle.com/javase/6/docs/api/java/util/Date.html

answered Jul 29 '14 at 14:52

David Tran

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score 0 · Answer 2 · answered Jul 29 '14 at 14:54

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You can convert date into timestamp and sort it. It is very easy for sorting.

answered Jul 29 '14 at 14:54

Prashant Gurav

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How to sort a list of objects?

2 Answers2