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| From | Sven Köhler <remove-sven.koehler@gmail.com> |
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Alternative to TreeSet? |
| Date | Tue, 07 May 2013 19:36:44 +0300 |
| Lines | 25 |
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On 05/06/2013 06:10 PM, laredotornado@zipmail.com wrote: > Hi, > > We're using Java 6. Is there a java.util.Set data structure that can > return a sorted list of elements and can contain two elements even if > compareTo returns 0 against those two elements but calling equals > against the two elements returns false? TreeSet doesn't do the job. Implement a Comparator and pass it to the TreeSet. The Comparator can sort objects for which equals returns false in any arbitrary (but deterministic) order. > In our example, we have products with an order ID column, so two > products could have the same order ID but may not be equal. We would > like to sort the products based on this order ID, however. The Comparator would sort the products based on their ID first - and if the IDs are equal it would sort them based on other attributes. Is that what you want? Regards, Sven
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Alternative to TreeSet? laredotornado@zipmail.com - 2013-05-06 08:10 -0700
Re: Alternative to TreeSet? Eric Sosman <esosman@comcast-dot-net.invalid> - 2013-05-06 11:19 -0400
Re: Alternative to TreeSet? Lew <lewbloch@gmail.com> - 2013-05-06 11:33 -0700
Re: Alternative to TreeSet? Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-05-06 18:01 -0300
Re: Alternative to TreeSet? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-05-06 08:25 -0700
Re: Alternative to TreeSet? Robert Klemme <shortcutter@googlemail.com> - 2013-05-07 07:58 +0200
Re: Alternative to TreeSet? Roedy Green <see_website@mindprod.com.invalid> - 2013-05-07 09:21 -0700
Re: Alternative to TreeSet? Sven Köhler <remove-sven.koehler@gmail.com> - 2013-05-07 19:36 +0300
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