Why main method is marked as public?

Question

I have a question that why main method is marked as public?

According to an answer on stackoverflow, It is declared as static

Answer 1

Because the JLS, Section 12.1.4, says so:

The method main must be declared public, static, and void. It must specify a formal parameter (§8.4.1) whose declared type is array of String.

If it's not public, then it won't be found; you'll get

Error: Main method not found in class Main, please define the main method as:
   public static void main(String[] args)