public class CircularList<E>
{
	/**
 
    * The first node of this list
 
    */
 
   private  CircularNode<E> firstNode;
 
	/**
 
	* Maintains the cursor: current node
 
	*/
 
	public CircularNode<E> cursor;
 
	/**
 
    * The last node of this list
 
    */
 
    private CircularNode<E> lastNode;
 
	/**
	 * Many unrelated methods go here
	 */
 
	/**
 
    * Returns the circular node at the specified position in this list.
 
    *
 
    * @param index index of a node to return
 
    *
 
    * @returns the node at the specific position in the list
 
    *
 
    * @throws java.lang.IndexOutOfBoundsException if the index is out of range (index < 0 || index >= size())
 
    */
 
    public CircularNode<E> getNode(int index) throws IndexOutOfBoundsException
 
    {
      if (index < 0 || index > size)
 
           throw new IndexOutOfBoundsException();
 
		else
 
		{
 
			CircularNode<E> tempNode = new CircularNode<E>();
 
 
 
			tempNode = firstNode;
 
 
 
			int tempIndex = 0;
 
 
 
			while (tempIndex != index)
 
			{
 
				tempNode = tempNode.getNextNode();
 
 
 
				tempIndex++;
 
			}
 
 
 
			return tempNode;
 
		}
 
   }
 
 
   /**
 
     * This class provides an iterator for this CircularList.
 
     *
 
     * @author Bryan Davis
 
     */
 
    public class CircularListIterator<E> implements java.util.ListIterator<E>{
 
   	/**
 
       * The index of nextNode
 
       */
 
      private int nextIndex;
 
 
 
   	/**
 
      * The node that this iterator points to
 
      */
 
     	private CircularNode<E> nextNode;
 
 
 
   	/**
 
       * The last node returned by next() or previous()
 
       */
 
       private CircularNode<E> previousNode;
 
 
 
     	/**
 
       * Returns the next element in the list
 
       */
 
       public E next()
 
       {
 
			nextIndex++;
 
         cursor = cursor.getNextNode();
 
			return cursor.getDataElement();
 
       }
 
 
 
 
 
   	/**
 
       * Returns the previous element in the list
 
       */
 
      public E previous()
      {
 
         nextIndex--;
 
         cursor = cursor.getNextNode();
 
	 return cursor.getDataElement();
 
      }
 
    }
}

found in CircularList.CircularListIterator<E> Incompatible Types.
Found: E
Required: E
       return cursor.getDataElement();
                                         ^

public class CircularNode<E>{
 
   /**
 
     * The data element this node holds
 
     */
 
     private E dataElement;
 
   /**
 
     * Return the data element of this node
 
     * @return the data element of this node
 
     */
 
    public E getDataElement(){
 
       return dataElement;
 
    }
}

private final class CircularIterator implements Iterator<E> {
  // methods go here
}