Leetcode 206. 反转链表

题目
原题链接: https://leetcode-cn.com/problems/reverse-linked-list

分析

题解

/**
 * 迭代方法
 */
class Solution {
    public ListNode reverseList(ListNode head) {
        if (null == head){
            return null;
        }

        ListNode res = null;
        while(head != null){
            ListNode temp = head.next;
            head.next = res;
            res = head;
            head = temp;
        }

        return res;
    }
}