【LeetCode刷题-链表】--203.移除链表元素

203.移除链表元素

方法：定义一个节点指向头节点head，避免头结点单独操作

/*** 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) {ListNode dumyhead  = new ListNode(0);dumyhead.next = head;ListNode cur = dumyhead;while(cur.next != null){if(cur.next.val == val){cur.next = cur.next.next;}else{cur = cur.next;}}return dumyhead.next;}
}