[ 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 Class File Versions JDK Version ByteCode Ver..