왜 외부 패키지에서 싱글톤 사용이 안되는걸까요..?

Question

패키지 sec05.exam04에 있는 Singleton 클래스를패키지 sec03.exam02에 있는 AAA 클래스에서 참조하려고 합니다. 싱글콘 클래스의 내용은 :&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;package sec05.exam04; public class Singleton {private static Singleton singleton &#61; new Singleton();private Singleton() {} static Singleton getInstance() { return singleton;} }&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61; 그리고 AAA 클래스의 내용은 : package sec03.exam02; import sec05.exam04.Singleton; public class AAA { public static void main(String[] args) { Singleton obj1 &#61; Singleton.getInstance(); }}&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;입니다.다른 패키지에 있는 클래스를 참조하는 거니까 import 문도 제대로 써줬고,getInstance() 메소드를 통해서 접근하는건데왜 오류가 날까요?.. ㅠㅠ

jslovers · Answer

기초적인 건데 오류를 잘 살펴보세요

매운만두맥주 · Answer

public 생략되면 자동적으로 default 라는걸 몰랐었네요.. ㅜ

왜 외부 패키지에서 싱글톤 사용이 안되는걸까요..?

2개의 답변

#singleton 목록