203. Remove Linked List Elements

 1     public ListNode removeElements(ListNode head, int val) {
 2         if(head == null) {
 3             return null;
 4         }
 5         ListNode dummy = new ListNode(-1);
 6         dummy.next = head;
 7         ListNode fakeHead = dummy;
 8         while(dummy.next != null) {
 9             if(dummy.next.val == val) {
10                 dummy.next = dummy.next.next;
11             } else {
12                 dummy = dummy.next;
13             }
14         }
15         return fakeHead.next;
16     }