Hello world works but then gets error that there's no main?

Question

I have the following simple hello world in Java:

class A {
    static {
        System.out.println(\"Hello world\");
    }
}

It works as ex

Answer 1

It works as expected, but oddly: No. class gets loaded. And when a class is loaded, its static blocks are executed.

Why you get Exception in thread "main" java.lang.NoSuchMethodError: main

Because in first case you dont have a main method and in second case signature is not correct.

change it to public static void main(String a[])