New to java , have imported a benchmark into Eclipse3.4.0 (in WinXP). It came as one java file and multiple class files. I imported class files as a reference to an external lib. (classes are in refeence librariy section)

File builds OK and executes fine in Eclipse console.

So now I want to make a jar file of it for export.

Export -> jar file -> Jar File spec (I DON'T see my ext reference Libs here to check?) -> generate manifest

But seems jar file does not include my external class files , and can't find a way to do it.

errors once finishing export:

JAR export finished with warnings. See details for additional information.
Exported with compile warnings: caffeine3embedded/src/
Can not export external class folder at 'C:\temp\caffeine3\classes'.