Jacob Senpai Halp Me pt 2.

// Elements used in implementation of doubly linked lists.

public class DListNode
{
  private Object value;
  private DListNode next;
  private DListNode previous;

  // Constructor:
  public DListNode(Object initValue,
                   DListNode initNext,
                   DListNode initPrevious)
  // post: constructs new element with list
  //       prefix referenced by previous and
  //       suffix referenced by next
  {
    value = initValue;
    next = initNext;
    if (next != null)
        next.previous = this;
    previous = initPrevious;
    if (previous != null)
        previous.next = this;
  }

  public DListNode(Object initValue)
  // post: constructs a single element
  {
      this(initValue, null, null);
  }

  public Object getValue()
  // post: returns value stored here
  {
    return value;
  }

  public DListNode getNext()
  // post: returns the element that follows this
  {
    return next;
  }

  public DListNode getPrevious()
  // post: returns element that precedes this
  {
    return previous;
  }

  public void setValue(Object theNewValue)
  // post: sets a new value for this object
  {
    value = theNewValue;
  }

  public void setNext(DListNode theNewNext)
  // post: sets value associated with this element
  {
    next = theNewNext;
  }

  public void setPrevious(DListNode theNewPrevious)
  // post: establishes a new reference to a previous value
  {
    previous = theNewPrevious;
  }

  public String toString()
  // post: returns string representation of element
  {
      return "[ " + getValue() + "]";
  }
}