Remove Linked List Element

 1 public static ListNode removeElement(ListNode head, int val) {
 2         if (head == null) return null;
 3         
 4         ListNode dummy = new ListNode(0);
 5         dummy.next = head;
 6         ListNode p = dummy;
 7         
 8         while (p.next != null) {
 9             if (p.next.val == val) {
10                 ListNode next = p.next;
11                 p.next = next.next;
12             } else {
13                 p = p.next;
14             }
15         }
16         return dummy.next;
17     }