Eclipse in Linux: cannot find edu.wpi...

I am trying to use Eclipse in Linux Mint to do programming.

However, I cannot import edu.wpi.first.wpilibj.*;

It just doesn’t find it. I assume that I need to put something in the classpath (Window/preferences/java/build path/classpath), but what?

I have installed both of the FRC plugins
Robot C++ Development
Robot Java Development
and also CDT ( C/C++ Development Tools SDK (but I may have installed this AFTER the FRC plugins).

I also don’t see the new project wizard for creating FRC Robot projects.