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## org.apache.commons.collections
Interface OrderedMapIterator

All Superinterfaces:
  Iterator, MapIterator, OrderedIterator

All Known Implementing Classes:
  AbstractLinkedMap.LinkMapIterator, AbstractOrderedMapIteratorDecorator, DualTreeBidiMap.BidiOrderedMapIterator, EmptyOrderedMapIterator, UnmodifiableOrderedMapIterator

public interface OrderedMapIterator
extends MapIterator, OrderedIterator

Defines an iterator that operates over an ordered `Map`.

This iterator allows both forward and reverse iteration through the map.

Since:
  Commons Collections 3.0
Version:
  $Revision: 1.4 $ $Date: 2004/02/18 01:15:42 $
Author:
  Stephen Colebourne

Method Summary
`boolean` | `hasPrevious()` Checks to see if there is a previous entry that can be iterated to.
`Object` | `previous()` Gets the previous key from the `Map`.

Methods inherited from interface org.apache.commons.collections.MapIterator
`getKey, getValue, hasNext, next, remove, setValue`

Method Detail

### hasPrevious

    public boolean hasPrevious()

  Checks to see if there is a previous entry that can be iterated to.

  Specified by:
    `hasPrevious` in interface `OrderedIterator`
  Returns:
    `true` if the iterator has a previous element

### previous

    public Object previous()

  Gets the previous key from the `Map`.

  Specified by:
    `previous` in interface `OrderedIterator`
  Returns:
    the previous key in the iteration
  Throws:
    `NoSuchElementException` - if the iteration is finished

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