多选题 Which are true about the classes and interfaces in j ava.util? (Choose all that apply.)

A、 LinkedHashSet is-a Collection.
B、 Vector is-a List.
C、 LinkedList is-a Queue.
D、 LinkedHashMap is-a Collection.
E、 TreeMap is-a SortedMap.
F、 Queue is-a Collection.
G、 Hashtable is-a Set.

【正确答案】 A、B、C、E、F

【答案解析】