関連ワード:  why main method is public in java    why main method is public static in java    why main method is always public in java    why main method is public static void in java    why main method is declared as public in java    why main method should be public in java    why main () method is declared as public static in java programming    why main method is declared as public and static in java    discuss why main () method is public static and void in java    why is the main method in java qualified as public static and void