I'm having difficulty creating more than one Java Target/Executable in
Project Builder.

My coding style is such that I typically like to have each class have
its own main(), maybe with some test code in it.

My understanding of how this is supposed to work is:

1. Create a new Target.
2. Make the new target the active target.
3. Add files to the target.
4. Compile and run.

When I try to run the new executable, I typically get a "no launchable
executable present" error.

I found several similar questions about multiple targets but no answer
- pleeeease help