203.remove linked list elements

 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode(int x) { val = x; }
 * }
 */
class  {
    public ListNode removeElements(ListNode head, int val) {
    if (head == null)
          return head;
        ListNode current = head;
     ListNode future = head.next;
     while (future != null) {
           if (future.val == val) {
                current.next = future.next;
              future = future.next;
            } else {
                current = current.next;
              future = future.next;
            }
        }

       if (head.val == val)
            head = head.next;
        return head;
    }
}