weiss.nonstandard
Class LinkedListIterator

java.lang.Object
  |
  +--weiss.nonstandard.LinkedListIterator

public class LinkedListIterator

extends java.lang.Object

Linked list implementation of the list iterator using a header node.

See Also:

LinkedList

Method Summary

void	advance() Advance the current position to the next node in the list.
boolean	isValid() Test if the current position is a valid position in the list.
java.lang.Object	retrieve() Return the item stored in the current position.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

isValid

public boolean isValid()

Test if the current position is a valid position in the list.

Returns:

true if the current position is valid.

retrieve

public java.lang.Object retrieve()

Return the item stored in the current position.

Returns:

the stored item or null if the current position is not in the list.

advance

public void advance()

Advance the current position to the next node in the list. If the current position is null, then do nothing.