Singleton Pattern





### java singleton
> [싱글톤 패턴이 필요한 이유와 실제 서비스에 적용까지](https://injae-kim.github.io/dev/2020/08/06/singleton-pattern-usage.html)

> [Interview_Question_for_Beginner/DesignPattern at master · JaeYeopHan/Interview_Question_for_Beginner](https://github.com/JaeYeopHan/Interview_Question_for_Beginner/tree/master/DesignPattern)

> [[싱글톤 패턴] 오직 하나의 접근, 그리고 전역적인 접근](https://thinknotepad.tistory.com/entry/%EC%8B%B1%EA%B8%80%ED%86%A4-%ED%8C%A8%ED%84%B4-%EC%98%A4%EC%A7%81-%ED%95%98%EB%82%98%EC%9D%98-%EC%A0%91%EA%B7%BC-%EA%B7%B8%EB%A6%AC%EA%B3%A0-%EC%A0%84%EC%97%AD%EC%A0%81%EC%9D%B8-%EC%A0%91%EA%B7%BC?category=642643)







