jakarta commons

The jakarta commons project is a great example of reusability. It’s a collection of utilities that can be used independently. The only problem is a lack of documentation. There are some books available. I’ll look into these as soon as possible (just ordered a copy of the jakarta commons cookbook, ISBN:059600706X).

Some I used so far are:
commons.lang.StringUtils
commons.lang.builder.*
commons.collections.CollectionUtils
commons.collections.Transformer

For anyone who wants to get involved:
http://jakarta.apache.org/commons/volunteering.html

resources:
http://www.onjava.com/pub/a/onjava/2003/06/25/commons.html
http://jakarta.apache.org/commons/
http://www.javaworld.com/javaworld/jw-07-2005/jw-0725-chain.html
http://www.javaworld.com/javaworld/jw-10-2002/jw-1025-opensourceprofile.html

I recently wrote some code to convert time from the HH:mm notation towards decimal notation and vice versa, could it be done with commons and if not see for submitting code.
What about some tool to query javadoc in order to find commons code quickly?

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