题目

解决：

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 hereListNode end = null;while (head != null) {ListNode endNext = null;if (end == null) {end = new ListNode(head.val);end.next = null;} else {endNext = new ListNode(end.val);endNext.next = end.next;end.next = endNext;end.val = head.val;}head = head.next;}return end;}
}