题解 | #判断链表中是否有环#
判断链表中是否有环
https://www.nowcoder.com/practice/650474f313294468a4ded3ce0f7898b9
/** * Definition for singly-linked list. * class ListNode { * int val; * ListNode next; * ListNode(int x) { * val = x; * next = null; * } * } */ public class Solution { public boolean hasCycle(ListNode head) { if(head == null || head.next == null){ return false; } ListNode slow = head, fast = head; while(fast != null && fast.next != null){ fast = fast.next.next; slow = slow.next; if(fast == slow){ return true; } } return false; } }#学习##刷题##每日刷题#