The question mark means the code is not yet added and committed to your repository
(community.openhab.org/t/solved-eclipse-ide-meaning-of-symbols-in-package-explorer-creating-a-jar-file/66620)
* 단축키는 한글/영문 대소문자로 이용 가능하며, 티스토리 기본 도메인에서만 동작합니다.