题解 | #反转链表#
反转链表
https://www.nowcoder.com/practice/75e878df47f24fdc9dc3e400ec6058ca
import java.util.*;
/*
* public class ListNode {
* int val;
* ListNode next = null;
* public ListNode(int val) {
* this.val = val;
* }
* }
*/
public class Solution {
/**
* 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
*
*
* @param head ListNode类
* @return ListNode类
*/
public ListNode ReverseList (ListNode head) {
// write code here
ListNode l=new ListNode(0);
while(head!=null)
{
ListNode h=head.next;
head.next=l.next;
l.next=head;
head=h;
}
return l.next;
}
}