java.util.Iterator<E> |
Known Indirect Subclasses |
An iterator over a collection. 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.
Public Methods | |||||||||||
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Returns
true if the iteration has more elements. | |||||||||||
Returns the next element in the iteration.
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Removes from the underlying collection the last element returned
by this iterator (optional operation).
|
Returns 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 elements
Returns the next element in the iteration.
NoSuchElementException | if the iteration has no more elements |
---|
Removes from the underlying collection the last element returned
by this iterator (optional operation). This method can be called
only once per call to 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 iterator |
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IllegalStateException | 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
|