Collection Interface

Collection is a root Interface in the collection data structure Hierarchy.

Collection Interface has super Interface Iterable<E>.

Following are the sub interfaces of Collection

1. BeanContext
2. BeanContextServices
3. BlockingDeque<E>
4. BlockingQueue<E>
5. Deque<E>
6. List<E>
7. NavigableSet<E>
8. Queue<E>
9. Set<E>
10. SortedSet<E>
11. TransferQueue<E>

Collection Interface contains following methods

boolean     add(E e);
boolean     addAll(Collection<? extends E> c);
void          clear();
boolean     contains(Object o);
boolean     containsAll(Collection<?> c);
boolean     equals(Object o);
int              hashCode();
boolean     isEmpty();
Iterator<E> iterator();
boolean     remove(Object o);
boolean     removeAll(Collection<?> c);
boolean     retainAll(Collection<?> c);
int              size();
Object[]     toArray();
<T> T[]     toArray(T[] a);