import java.util.*;
public class Solution {
    public boolean isPail (ListNode head) {
        ArrayList<Integer> nums = new ArrayList();
        //将链表元素取出一次放入数组
        while(head != null){ 
            nums.add(head.val);
            head = head.next;
        }
        ArrayList<Integer> temp = new ArrayList();
        temp = (ArrayList<Integer>) nums.clone();
        //准备一个数组承接翻转之后的数组
        Collections.reverse(temp); 
        for(int i = 0; i < nums.size(); i++){
            int x = nums.get(i);
            int y = temp.get(i);
            //正向遍历与反向遍历相同
            if(x != y) 
                return false;
        }
        return true;
    }
}