Why a class containg a main method doesn't need to be public in Java? [duplicate]

Answer 1

Just for kicks, a demo that private classes can also hold main:

class Outer {
    private static class Inner {
        public static void main(String[] args) {
            System.out.println("Hello from Inner!");
        }
    }
}

Compiles and runs fine from the command line:

C:\junk>javac Outer.java
C:\junk>java Outer$Inner
Hello from Inner!

C:\junk>