说明

Author: laileon

src/com/blankj/custom/structure/ListNode.java

@@ -18,11 +18,10 @@ public ListNode(int val, ListNode next) {
     public ListNode reverseList(ListNode head) {
         ListNode curr = null;
         while (head != null) { //如果当前节点不为空
+            ListNode tmp = head.next; //tmp赋值为head后面的节点
             curr = head; //prev后移一位
-            head = head.next;
+            head = tmp; //head后移一位
             head.next = curr; //head指向head后面那个
-//            ListNode tmp = head.next; //tmp赋值为head后面的节点
-//            head = tmp; //head后移一位
         }
         return curr;
     }