Cannot access class javax.sql.RowSet

Hello everyone,
I had a question about this error I am receiving "cannot access class.javax.sql.RowSet". I have put the RowSet.jar file into my jdk/jre/lib/ext directory and when I compile I recieve this error. Can Anyone help? Thanks!

I think you need to add one (or more) of the available libraries to your project, in your project's settings dialog, but I'm unsure which. If you can't find the correct one, you can always add a newly created one, which holds a reference to your jar file.

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