class ListNodeDemo
{
	public static void main(String[] args)
	{
		ListNode head = new ListNode();
		head.setData("Park Lee");
		ListNode temp = new ListNode("Joe Smith", head);
		head = temp;
		temp = temp.getLink();
		ListNode rear = new ListNode("Tracy Meet", null);
		temp.setLink(rear);
		// out the head?
		System.out.println(head.getData());
		// out the middle one?
		System.out.println(temp.getData());
		// out the rear one?
		System.out.println(temp.getLink().getData());
	}
}