| java.util.Iterator
All known Subclasses: com.sun.jumpimpl.module.download.Document,
| Iterator | | public interface Iterator (Code) | | An iterator over a collection. Iterator takes the place of Enumeration in
the Java collections framework. Iterators differ from enumerations in two
ways:
- Iterators allow the caller to remove elements from the
underlying collection during the iteration with well-defined
semantics.
- Method names have been improved.
This interface is a member of the
Java Collections Framework.
author:
Josh Bloch
version:
1.14, 02/02/00
See Also: Collection
See Also: ListIterator
See Also: Enumeration
since:
1.2 |
| Method Summary | |
| boolean | hasNext()
Returns true if the iteration has more elements. | | Object | next()
Returns the next element in the iteration. | | void | remove()
Removes from the underlying collection the last element returned by the
iterator (optional operation). |
| hasNext | | boolean hasNext()(Code) | | 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 iterator has more elements. |
| remove | | void remove()(Code) | | Removes from the underlying collection the last element returned by the
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.
exception:
UnsupportedOperationException - if the removeoperation is not supported by this Iterator.
exception:
IllegalStateException - if the next method has notyet been called, or the remove method has alreadybeen called after the last call to the nextmethod. |
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