Eclipse error “Could not find or load main class”

Question

I know there are many duplicates of this question, but I have looked at them all, and none of them have solved the issue.

I am trying to run a class that has a main

Answer 1

Had the same problem, struggling with it for a while: couldn't find main class.

I did Project -> Clean -> Clean all Projects

Cleaned everything, and tada, it compiled!

Answer 2

If you are using maven Project...

First please clean your project. then installed maven- if build success then run your project.

then project will be working fine.

thanks