mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-30 03:54:41 +08:00
06e3b913b3
* java/util/AbstractSequentialList.java: Synchronize with Classpath.
* java/util/Collection.java: Likewise.
* java/util/Comparator.java: Likewise.
* java/util/Dictionary.java: Likewise.
* java/util/Iterator.java: Likewise.
* java/util/ListIterator.java: Likewise.
* java/util/Map.java: Likewise.
* java/util/Set.java: Likewise.
From-SVN: r39708
69 lines
2.7 KiB
Java
69 lines
2.7 KiB
Java
/* Iterator.java -- Interface for iterating over collections
|
|
Copyright (C) 1998 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
As a special exception, if you link this library with other files to
|
|
produce an executable, this library does not by itself cause the
|
|
resulting executable to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why the
|
|
executable file might be covered by the GNU General Public License. */
|
|
|
|
|
|
package java.util;
|
|
|
|
/**
|
|
* An object which iterates over a collection. An Iterator is used to return the
|
|
* items once only, in sequence, by successive calls to the next method. It is
|
|
* also possible to remove elements from the underlying collection by using the
|
|
* optional remove method. Iterator is intended as a replacement for the
|
|
* Enumeration interface of previous versions of Java, which did not have the
|
|
* remove method and had less conveniently named methods.
|
|
*/
|
|
public interface Iterator
|
|
{
|
|
/**
|
|
* Tests whether there are elements remaining in the collection.
|
|
*
|
|
* @return true if there is at least one more element in the collection,
|
|
* that is, if the next call to next will not throw NoSuchElementException.
|
|
*/
|
|
boolean hasNext();
|
|
|
|
/**
|
|
* Obtain the next element in the collection.
|
|
*
|
|
* @return the next element in the collection
|
|
* @exception NoSuchElementException if there are no more elements
|
|
*/
|
|
Object next();
|
|
|
|
/**
|
|
* Remove from the underlying collection the last element returned by next.
|
|
* This method can be called only once after each call to next. It does not
|
|
* affect what will be returned by subsequent calls to next. This operation is
|
|
* optional, it may throw an UnsupportedOperationException.
|
|
*
|
|
* @exception IllegalStateException if next has not yet been called or remove
|
|
* has already been called since the last call to next.
|
|
* @exception UnsupportedOperationException if this Iterator does not support
|
|
* the remove operation.
|
|
*/
|
|
void remove();
|
|
}
|