Java实现从头到尾打印链表

从头到尾打印链表

输入：{4,5,6} 返回 {6,5,4}

import java.util.ArrayList;
public class Solution {
    public ArrayList<Integer> printListFromTailToHead(ListNode listNode) {
        ArrayList<Integer> list  = new ArrayList<>();
        while(listNode != null){
            list.add(0,listNode.val);
            listNode = listNode.next;
        }
        return list;
    }
}