The same task can only be executed once.
Skips the next execution if the previous one is still running.
건너뛰기. 이전 작업이 실행 중이라면,
이번 주기에 도래한 작업은 실행하지 않고 패스합니다.
The next execution is delayed until the previous one is finished.
The next execution time is calculated at the end of the previous one.
지연 실행. 이전 작업이 끝날 때까지 대기한 후,
끝난 시점부터 다음 실행 주기를 새로 계산하여 예약합니다.
Returns the enum constant of this class with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this class. (Extraneous whitespace characters are
not permitted.)
Parameters:
name - the name of the enum constant to be returned.