E
- the type of elements returned by this iteratorpublic interface Iterator<E>
Iterator
takes the place of
Enumeration
in the Java Collections Framework. Iterators
differ from enumerations in two ways:
This interface is a member of the Java Collections Framework.
Collection
,
ListIterator
,
Iterable
Modifier and Type | Method and Description |
---|---|
boolean |
hasNext()
Returns
true if the iteration has more elements. |
E |
next()
Returns the next element in the iteration.
|
void |
remove()
Removes from the underlying collection the last element returned
by this iterator (optional operation).
|
boolean hasNext()
true
if the iteration has more elements.
(In other words, returns true
if next()
would
return an element rather than throwing an exception.)true
if the iteration has more elementsE next()
NoSuchElementException
- if the iteration has no more elementsvoid remove()
next()
. The behavior of an iterator
is unspecified if the underlying collection is modified while the
iteration is in progress in any way other than by calling this
method.UnsupportedOperationException
- if the remove
operation is not supported by this iteratorIllegalStateException
- if the next
method has not
yet been called, or the remove
method has already
been called after the last call to the next
method Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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