For what reason can the main class not be found?

Question

Java

I am compiling a package using mvn package. Then I run the command java -cp c:\...\test.jar ru.application(class location). Gives an error that the main class was not found. I also tried to do it on a simple package, everything works there.
What can interfere with finding the main class?

Answer 1

Good afternoon.
Your main() method is not located in a public class. Add an access modifier to the MySolution class public
Also I can assume that your jar does not have MANIFEST.MF
Or it is, but the class containing the main() method is not specified