@Override
	public String toString()
	{
		String s = "";
		if (this.getFirstNode() != null) 
		{
			if (this.getFirstNode().getNext() != null)
			{
				s = s + this.getFirstNode().getValue() + "\r\n";
				DListNode<T> nextNode = this.getFirstNode().getNext();
				while (nextNode.getNext() != null)
				{
					s = s + nextNode.getValue() + "\r\n";
					nextNode = nextNode.getNext();
				}
				s = s + nextNode.getValue() + "\r\n";
			}
			else
			{
				s += this.getFirstNode().getValue();
			}
		}
		return s;
	}