Multiple indexes for a Java Collection - most basic solution?

Posted by chris_l on Stack Overflow See other posts from Stack Overflow or by chris_l
Published on 2010-03-23T15:57:32Z Indexed on 2010/03/23 16:03 UTC
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Hi,

I'm looking for the most basic solution to create multiple indexes on a Java Collection.

Required functionality:

When a Value is removed, all index entries associated with that value must be removed.
Index lookup must be faster than linear search (at least as fast as a TreeMap).

Side conditions:

It should ideally work with JavaSE (6.0) alone - no extra libraries, if possible.
If necessary, then only small (not something like Lucene), common and well tested libraries. No database!

Of course, I could write a class that manages multiple Maps myself. But I'd like to know, if it can be done without - while still getting a simple usage similar to using a single indexed java.util.Map.

Thanks, Chris

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