题解 | 链表序列化

import java.util.*;

/*
 * public class ListNode {
 *   int val;
 *   ListNode next = null;
 *   public ListNode(int val) {
 *     this.val = val;
 *   }
 * }
 */

public class Solution {
   
    public ArrayList<Integer> listnodeToVector (ListNode head) {
        ArrayList<Integer> list = new ArrayList<>();
        if(head==null)return list;
        while(head!=null){
            list.add(head.val);
            head = head.next;
        }
        return list;
    }
}