What if main method is inside “non public class” of java file?

Question

I have a java file containing more than one class, out of which one is public. If main method is inside a non-public class. I can\'t run that java file. Why is that? and the

Answer 1

Simple Answer. You can't. You need to have main method in a public class and its signature should be public static void main(String... args)

there is no compilation error

Why there would be? You are doing nothing wrong as far as compilation rules are concerned. Only thing is that your non-public-class-main-method won't work as an entry point of your code.