Exported with compile warnings how do I see the warnings?

I am exporting a jar file for a Swing application. The error dialog says there are compile warnings that do not appear in the Eclipse compile.

I am wondering if this has something to do with the fact that the jar file manifest flags my main class entry with ‘No Entry” and the Jre will not run the jar file. The class I am using is copied directly from the Eclipse run dialog so it should be correct.

Is there a way to see a listing of the compile warning straight from the jar export?
Anyone seen the manifest main class entry flagged with ‘No Entry’?

Maurice