solution

Author: bunu23

.DS_Store

@@ -0,0 +1,28 @@
+/**
+ * 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; }
+ * }
+ */
+class Solution {
+    public ListNode reverseList(ListNode head) {
+        if (head == null) {
+            return head;
+        }
+        ListNode current = head;
+        ListNode previous = null;
+        ListNode next = null;
+        while (current != null) {
+            next = current.next;
+            current.next = previous;
+            previous = current;
+            current = next;
+        }
+        return previous;
+
+    }
+}