참조
https://mangkyu.tistory.com/118
https://hbase.tistory.com/209
https://catsbi.oopy.io/df0df290-9188-45c1-b056-b8fe032d88ca
https://asfirstalways.tistory.com/158
https://medium.com/@lazysoul/jvm-%EC%9D%B4%EB%9E%80-c142b01571f2
https://beststar-1.tistory.com/3
http://tcpschool.com/java/java_intro_programming
https://performeister.tistory.com/m/46
https://velog.io/@aki/HotSpot-JVM
