Reading and extracting information from pdf file

Hi everybody!
what am looking for is Java packages which can allow me to read and extract information form pdf file
I would really appreciate link wtih sample code
thanks in advance!

STFW.
http://www.google.com/search?q=java+read+pdf&sourceid=mozilla-search&start=0&start=0&ie=utf-8&oe=utf-8

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