[Java] Class File Java Majar Version

0. 참고사이트

https://stackoverflow.com/questions/22489398/unsupported-major-minor-version-52-0
https://docs.oracle.com/javase/specs/jvms/se16/html/jvms-4.html

1. the major versions of classfiles

Java SE	Released	Major	Supported majors
1.0.2	May 1996	45	45
1.1	February 1997	45	45
1.2	December 1998	46	45 .. 46
1.3	May 2000	47	45 .. 47
1.4	February 2002	48	45 .. 48
5.0	September 2004	49	45 .. 49
6	December 2006	50	45 .. 50
7	July 2011	51	45 .. 51
8	March 2014	52	45 .. 52
9	September 2017	53	45 .. 53
10	March 2018	54	45 .. 54
11	September 2018	55	45 .. 55
12	March 2019	56	45 .. 56
13	September 2019	57	45 .. 57
14	March 2020	58	45 .. 58
15	September 2020	59	45 .. 59
16	March 2021	60	45 .. 60

* Java file을 실행할 때 Runtime에 사용하는 Java 버전이 컴파일된 파일의 버전보다 낮다면 실행되지 않습니다.