VMware Coding Challenge: Removing Duplicates Entries

     static LinkedListNode removeDuplicates(LinkedListNode list) {
         LinkedListNode cur = list;
         HashSet<Integer> set = new HashSet<Integer>();
         set.add(list.val);
         while (cur.next != null) {
             if (!set.contains(cur.next.val)) {
                 set.add(cur.next.val);
                 cur = cur.next;
             }
             else {
                 cur.next = cur.next.next;
             }
         }
         return list;

     }