public static IntNode listSort(IntNode head)
   {
       IntNode cursor;
       int largest;
       IntNode copyHead=null;
       IntNode target=null;
       while(head!=null)
       {
           largest = Integer.MIN_VALUE;
           for(cursor=head.link;cursor!=null;cursor=cursor.link)
           {
               if(cursor.data > largest)
               {
                   target=cursor;
                   largest=cursor.data;
               }
           }
           copyHead = new IntNode(target.data, copyHead);
           target.setData(head.data);
           head=head.link;
       }
       return copyHead;
   }