JDK Version과 Bytecode Version

[ Tip ]
Exception in thread "main" java.lang.UnsupportedClassVersionError:
com/example/demo/SpringSchedulerApplication has been compiled by
a more recent version of the Java Runtime(class file version 61.0)
, this version of the Java Runtime only recognizes class file versions up to 52.0

위와 같은 에러가 발생하는 경우
아래를 표를 보고 JDK버전을 class file이 요구하는 버전으로 맞춰주면 된다

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Class File Versions
JDK Version	ByteCode Version
Java 1.0	45.0
Java 1.1	45.3
Java 1.2	46.0
Java 1.3	47.0
Java 1.4	48.0
Java 5	49.0
Java 6	50.0
Java 7	51.0
Java 8	52.0
Java 9	53.0
Java 10	54.0
Java 11	55.0
Java 12	56.0
Java 13	57.0
Java 14	58.0
Java 15	59.0
Java 16	60.0
Java 17	61.0
Java 18	62.0
Java 19	63.0
Java 20	64.0
Java 21	65.0