anonymous class EJ2E Item 22. nonstatic 보다는 static 멤버 클래스를 선호하라 참조: Effective Java 2nd Edition. Item 22: Favor static member class over nonstatic 중첩 클래스(nested class)에는 네 종류가 있다. – static member class – nonstatic member class – anonymous class – local class Static Member Class public class SpringSprout { static