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public interface MapIterator<K,V>
Defines an iterator that operates over a Map.
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);
}
| Method Summary | |
|---|---|
K |
getKey()
Gets the current key, which is the key returned by the last call to next(). |
V |
getValue()
Gets the current value, which is the value associated with the last key returned by next(). |
boolean |
hasNext()
Checks to see if there are more entries still to be iterated. |
K |
next()
Gets the next key from the Map. |
void |
remove()
Removes the last returned key from the underlying Map (optional operation). |
V |
setValue(V value)
Sets the value associated with the current key (optional operation). |
| Method Detail |
|---|
boolean hasNext()
hasNext in interface Iterator<K>true if the iterator has more elementsK next()
Map.
next in interface Iterator<K>NoSuchElementException - if the iteration is finishedK getKey()
next().
IllegalStateException - if next() has not yet been calledV getValue()
next().
IllegalStateException - if next() has not yet been calledvoid remove()
Map (optional operation).
This method can be called once per call to next().
remove in interface Iterator<K>UnsupportedOperationException - if remove is not supported by the map
IllegalStateException - if next() has not yet been called
IllegalStateException - if remove() has already been called
since the last call to next()V setValue(V value)
value - the new value
UnsupportedOperationException - if setValue is not supported by the map
IllegalStateException - if next() has not yet been called
IllegalStateException - if remove() has been called since the
last call to next()
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