[JAVA] 자바 "..." 이게 뭘까? (가변인자, varargs)

https://hashcode.co.kr/questions/188/%EC%9E%90%EB%B0%94%EC%97%90%EC%84%9C-%EB%A7%A4%EA%B0%9C%EB%B3%80%EC%88%98%EC%97%90-%EC%B2%98%EB%9F%BC-%EC%A0%90-3%EA%B0%9C%EA%B0%80-%EB%82%98%EC%98%A4%EB%8A%94%EB%8D%B0-%EC%9D%B4%EA%B2%8C-%EB%AD%94%EA%B0%80%EC%9A%94