Defines an iterator that operates over a Map.
This iterator is a special version designed for maps. It can be more
efficient to use this rather than an entry set iterator where the option
is available, and it is certainly more convenient.
A map that provides this interface may not hold the data internally using
Map Entry objects, thus this interface can avoid lots of object creation.
In use, this iterator iterates through the keys in the map. After each call
to next(), the getValue() method provides direct
access to the value. The value can also be set using setValue().
MapIterator it = map.mapIterator();
while (it.hasNext()) {
Object key = it.next();
Object value = it.getValue();
it.setValue(newValue);
}
since:
Commons Collections 3.0
version:
$Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
author:
Stephen Colebourne |