class TestSLLImproved {

    public static void main (String[] args) {
	SingleLinkedListImproved list = new SingleLinkedListImproved();

	list.insertLast(new Integer(6));
	list.insertFirst(new Integer(3));
	list.insertLast(new Integer(5));
	list.insertAfterNode(new Integer(1), list.getHead());
	
	System.out.println(list);
	System.out.println("tail: " + list.getTail());
	System.out.println(list.searchNodeImproved(new Integer(4)) != null);
	System.out.println("tail: " + list.getTail());
	System.out.println(list.searchNodeImproved(new Integer(5)) != null);
	System.out.println("tail: " + list.getTail());
    }
}