How to open acrobat in java and compare two files using javacode

I am absolutely new to use acrobat software in Java. I want to open two pdf files at a time and then compare the differences between them thru java program .
i am not sure how to do it. iam trying many ways without success.
I used jre and could open open files using runtime method , but couldn't do comaparision. i..e could't access tools menu (alt+t) Compare two files and <enter>. help in java will be appreciated.
Pls guide me the steps to use the acrobat library. At http://partners.adobe.com/asn/acrobat i found supporting vb and vc only.
Any help or links are greatly appreciated.

iText is an open source PDF library, reads a PDF one page at a time. You could check it out. I've used it for writing/splitting/concatenating PDFs, but not comparing files
http://www.lowagie.com/iText/
Scott
http://www.swiftradius.com

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