Exception in thread “main” java.lang.ClassNotFoundException:

Question

I recently installed intellij IDEA 14.0 and to make sure everything was working I created a simple Hello World program. I do not understand why the output is not correct and why

Answer 1

The reason you're getting this error is because you didn't save the class into a file called Hello.java (case-sensitive!)

Answer 2

This is just problem of intellij IDE.

Solution Steps:

1. CtrlShiftAlts -> Preject Setting -> modules tab -> expand <project_name> and go to <project_name>_main
2. refer Image:
3. In Sources tab -> ** click on x symbol**

4. click YES
5. Right click on -> sources
6. Apply and OK

Finally build your project.

Enjoy.

Answer 3

It usually happens with IntelliJ.

I solved it deleting all modules and only leaving which have more hierarchy

The other modules(like main or test) are already part of product