/** This class demonstrates the usage of ListNodes to create LinkedLists. */
public class ListNodeClient {
   public static void main(String[] args) {
      ListNode list = new ListNode();
      list.data = 5;                             
      list.next = new ListNode();                
      list.next.data = 10;                       
      list.next.next = new ListNode();
      list.next.next.data = 15;                  

      ListNode node = list.next;            
      list.next = list.next.next;                
      list.next.next = node;                          

      System.out.println(list);
    }
}