What Jars are being used

I have a big problem with the number of jars currently being used within my application.
Is there a way of working out what jars are needed and which are not??
Regards
Jai

I am interested in this as well. I have "jpa.jar" which I removed from my Eclipse build path and no errors. But it may have interfaces/classes that are referenced from other JARs in my WAR. How do I determine if any types in jpa.jar are being currently used so I can determine if it needs to be included in the WAR build or not?
I tried [http://depfind.sourceforge.net/|http://depfind.sourceforge.net/] but it finds which JAR the type is in. I need to find references to a class from another class and tell me which JAR that's referenced. thx.

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