Methods for Iterator Class
The table lists the methods for the Iterator class.
Iterator Class
| Method | Return
Value |
Description |
|---|---|---|
add(Object element) |
Void | Inserts the specified element into the list immediately
before the element that would be returned by next(), if any, and after the element that would be returned by previous(), if any. If the element already exists on the list, an exception is thrown. |
hasNext() |
Boolean | Returns
true if the list iterator has more elements when
traversing the list in the forward direction. |
hasPrevious() |
Boolean | Returns
true if the list iterator has more elements when
traversing the list in the reverse direction. |
next() |
Object | Returns the next element in the list. Returns
null
if the
iteration does not have a next element. |
nextIndex() |
Integer | Returns the index of the element that would be returned
by a subsequent call to next(). Returns list size if the iterator is at the end of the list. |
previous() |
Object | Returns the previous element in the list. Returns
null if
the iteration does not have a previous element. |
previousIndex() |
Integer | Returns the index of the element that would be returned
by a subsequent call to previous() or -1 if iterator is at beginning of list. |
remove() |
Void | Removes from the list the last element that was returned
by next() or previous(). This method can be called only if either next() or previous() have been called and there were no calls to add() or remove() after the last call to next() or previous(). |
set(Object element) |
Void | Replaces the last element returned by
next() or
previous() with the specified element. This method can be called only if either next() or previous() have been called and there were no calls to add() or remove() after the last call to next() or previous(). |