E - the type of object returned by the iterator.public interface Iterator<E>
Iterator is used to sequence over a collection of objects.
Conceptually, an iterator is always positioned between two elements of a
collection. A fresh iterator is always positioned in front of the first
element.
If a collection has been changed since its creation, methods next and
hasNext() may throw a ConcurrentModificationException.
Iterators with this behavior are called fail-fast iterators.| Modifier and Type | Method and Description |
|---|---|
boolean |
hasNext()
Returns whether there are more elements to iterate, i.e.
|
E |
next()
Returns the next object in the iteration, i.e.
|
void |
remove()
Removes the last object returned by
next from the collection. |
boolean hasNext()
true if there are more elements, false otherwise.next()E next()
NoSuchElementException - if there are no more elements.hasNext()void remove()
next from the collection.
This method can only be called once after next was called.UnsupportedOperationException - if removing is not supported by the collection being
iterated.IllegalStateException - if next has not been called, or remove has
already been called after the last call to next.