How is this a runtime exception the code should not even compile

Question

https://www.sololearn.com/post/1327569/?ref=app

Answer 1

Program compiles fine. But at run time it can't find main method. so runtime exception. That's why it should be public .

Answer 2

Put your link in the description, not in the question area. It doesn't work.

Answer 3

Program compiles well but while execution it will search for main method
Since the method mentioned in program looks like main but it is not main method