What methods does Java Collection interface contain?

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