Java中哪些类实现了Iterator接口??答:是java.lang的接口 Iterable吧 所有已知子接口:BeanContext, BeanContextServices, BlockingDeque<E>, BlockingQueue<E>, Collection<E>, Deque<E>, List<E>, NavigableSet<E>, Queue<E>, Set<E>, SortedSet<E> 所有已知实现类:AbstractCollection, AbstractList, AbstractQueue, AbstractSequential...