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代码如下：

/*** Definition for singly-linked list.* public class ListNode {*     int val;*     ListNode next;*     ListNode() {}*     ListNode(int val) { this.val = val; }*     ListNode(int val, ListNode next) { this.val = val; this.next = next; }* }*/
class Solution {public ListNode removeElements(ListNode head, int val) {if(head == null) {return null;}ListNode dummy = new ListNode(-1,head);ListNode p = dummy;while(p.next != null) {if(p.next.val == val) {p.next = p.next.next;}else {p = p.next;}}return dummy.next;}
}