1  /**

  2     A list iterator allows access of a position in a linked list.    

  3     This interface contains a subset of the methods of the 

  4     standard java.util.ListIterator interface. The methods for

  5     backward traversal are not included.

  6  */

  7  public interface ListIterator

  8  {  

  9     /**

 10        Moves the iterator past the next element.

 11        @return the traversed element

 12     */

 13     Object next();

 14        

 15     /**

 16        Tests if there is an element after the iterator position.

 17        @return true if there is an element after the iterator position

 18     */

 19     boolean hasNext();

 20        

 21     /**

 22        Adds an element before the iterator position

 23        and moves the iterator past the inserted element.

 24        @param element the element to add

 25     */

 26     void add(Object element);

 27        

 28     /**

 29        Removes the last traversed element. This method may

 30        only be called after a call to the next() method.

 31     */

 32     void remove();

 33  

 34     /**

 35        Sets the last traversed element to a different value. 

 36        @param element the element to set

 37     */

 38     void set(Object element);

 39  }