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
import java.util.*;
public class Solution {
public boolean hasCycle(ListNode head) {
ListNode low = head, fast = head;
while(fast != null && fast.next != null){
low = low.next;
fast = fast.next.next;
if(low == fast)
return true;
}
return false;
}
}