剑指offer---从尾到头打印链表

/**
*    public class ListNode {
*        int val;
*        ListNode next = null;
*
*        ListNode(int val) {
*            this.val = val;
*        }
*    }
*
*/
import java.util.ArrayList;
public class Solution {
    ArrayList<Integer> list = new ArrayList<>();
    public ArrayList<Integer> printListFromTailToHead(ListNode listNode) {
       if(listNode != null ){
           printListFromTailToHead(listNode.next);
           list.add(listNode.val);
       }
        return list;
    }
}