206.反转链表

题目反转链表 点击跳转文章目录题目描述题目意思三指针链表题目描述题目意思给你一个链表1 - 2 - 3 - 4 - 5 - null要求反转为5 - 4 - 3 - 2 - 1 - null三指针prev前一个节点(a) cur当前节点(b) next临时保存下一个节点(c)链表/** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode() {} * ListNode(int val) { this.val val; } * ListNode(int val, ListNode next) { this.val val; this.next next; } * } */classSolution{publicListNodereverseList(ListNodehead){ListNodeanull;ListNodebhead;while(b!null){ListNodecb.next;b.nexta;ab;bc;}returna;}}