자바 링크

성능

https://blog.jooq.org/2015/02/05/top-10-easy-performance-optimisations-in-java/

자료구조

https://velog.io/@dudrkdl777/Set%EA%B3%BC-Map-e7k1omvrsl

스프링

https://ohjongsung.io/2017/06/02/%ED%95%84%EB%93%9C-%EC%A3%BC%EC%9E%85-field-injection-%EC%9D%84-%ED%94%BC%ED%95%98%EC%9E%90

https://coding-start.tistory.com/250

https://madplay.github.io/post/why-constructor-injection-is-better-than-field-injection

https://blog.marcnuri.com/field-injection-is-not-recommended/

스트림

https://homoefficio.github.io/2016/06/26/for-loop-%EB%A5%BC-Stream-forEach-%EB%A1%9C-%EB%B0%94%EA%BE%B8%EC%A7%80-%EB%A7%90%EC%95%84%EC%95%BC-%ED%95%A0-3%EA%B0%80%EC%A7%80-%EC%9D%B4%EC%9C%A0/

https://dororongju.tistory.com/137

https://12bme.tistory.com/461