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Java collections – Are There Alternatives?

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The built-in collections for Java have good performance and are nice to use – especially with the new for-loop pattern. But are there alternatives? And if so, why should I use them? (Please use the comment functionality ;-) ) The following collection implementations I found on the web:

There are also some older projects, which seem to be abandoned:

If you need real big data in memory you should consider a lightweight database (or a real one??) like neodatis, derby or something really interesting: HBase from the hadoop project (Apache/Yahoo!).

 

From http://karussell.wordpress.com 

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