Generation of tree like GUI

Hey guys,
I need to create a GUI which looks something like the left side content section of this webpage. If I click on the + sign I can see more topics that are there in that items.
http://publib.boulder.ibm.com/infocenter/wmbhelp/v6r0m0/index.jsp?topic=/com.ibm.etools.mft.doc/ac00490_.htm
Can anybody tell me which java API library should I use in order to create that tree like structure.
Thanks.

You can do that in Swing with JTree

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Generation of tree like GUI

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