题解 | #从尾到头打印链表#
从尾到头打印链表
https://www.nowcoder.com/practice/d0267f7f55b3412ba93bd35cfa8e8035
import java.util.*;
/**
* public class ListNode {
* int val;
* ListNode next = null;
*
* ListNode(int val) {
* this.val = val;
* }
* }
*
*/
import java.util.ArrayList;
public class Solution {
public ArrayList<Integer> printListFromTailToHead(ListNode listNode) {
ArrayList<Integer> res = new ArrayList<>();
ListNode cur = listNode;
ListNode pre = null;
//链表倒转
while(cur != null){
ListNode temp = cur.next;
cur.next = pre;
pre = cur;
cur = temp;
}
//遍历封装
while(pre != null){
res.add(pre.val);
pre = pre.next;
}
return res;
}
}
