How to specify the main() class in "jar -cfe ..." ?

[Raymond Schanks]

Assume I want to create a jar archive with a command

jar -cfe myjar.jar <MainApp> *.class

for some classes. The entrypoint should be the main() method in class "MyTestclass123".

What do I have to specify for <MainApp> in the command above?

Do I have to write:

jar -cfe myjar.jar main *.class

or

jar -cfe myjar.jar MyTestclass123 *.class

What if the main() class is the only main() method in all classes. Can I omit it then and write simply

jar -cf myjar.jar *.class

?

Raymond