public static void main(String[] args) {                int input = 22;                System.out.println("入力値;" + input);                binary(input);        }         public static void binary(int a) {                 if (0 < a / 2) {                        binary(a / 2);                        System.out.print(a % 2);                 } else {                        System.out.print(a);                }        }