Can I automatically build a .jar dependency when its source files change?

I have a project "MyApp", that depends on a .jar library "MyJar". Is it possible to set up the "MyApp" project so that "MyJar" builds automatically whenever I build MyApp and MyJar's source files have changed? I'd like to not have to go through the manual build artifact .. select output .. overwrite process every time I change my library's source.

Thanks!

-Greg