package dll;

/**
 * Nodes used to build doubly-linked lists.  In Saul's words, "These are
 * really structures."
 *
 * @author Samuel A. Rebelsky
 * @author CSC153 2004S (Except for those who blew off class today)
 */
class DoublyLinkedNode
  implements Position
{
  /**
   * The contents of the node.  Should never be null.
   */
  Object contents;

  /**
   * The next node in the list.  Should be null for the last
   * element of the list.
   */
  DoublyLinkedNode next;

  /**
   * The previous node in the list.  Should be null for the first
   * element of the list.
   */
  DoublyLinkedNode next;

  /**
   * Build a new node.
   */
  public DoublyLinkedNode(Object contents)
  {
    this.contents = contents;
    this.next = null;
    this.prev = null;
  } // DoublyLinkedNode(Object)

} // class DoublyLinkedNode