题解 | #反转链表#
判断链表中是否有环
http://www.nowcoder.com/practice/650474f313294468a4ded3ce0f7898b9
/*
public class ListNode {
int val;
ListNode next = null;
ListNode(int val) {
this.val = val;
}
}*/
public class Solution {
public ListNode ReverseList(ListNode head) {
if(head == null) {
return head;
}
ListNode prev = null;
ListNode cur = head;
ListNode temp = null;
while(cur != null) {
temp = cur.next;
cur.next = prev;
prev = cur;
cur = temp;
}
return prev;
}
} 
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