import java.util.*; /* public class ListNode { int val; ListNode next = null; ListNode(int val) { this.val = val; } }*/ public class PalindromeList { public boolean chkPalindrome(ListNode head) { // write code here //链表为空 if(head==null){ return true; } //找中间节点 ListNode fast=head; ListNode slow=head;...