1. 채우기 복사 검색 정렬 fill(), copy(), sort(), binarySearch() 2.
컬렉션 동기화 - synchronizedXXX() static Collection synchronizedCollection(Collection c) static List synchronizedList(List list) static Set synchronizedSet(Set s) static Map synchronizedMap(Map m) static SortedSet synchronizedSortedSet(SortedSet s) static SortedMap synchronizedSortedMap(SortedMap m) 3. 변경불가 컬렉션(readonly) - unmodifiableXXX() 변경불.....