Added Reverse Linked List

Author: shanvijha30

Reverse_Linked_List.java

@@ -0,0 +1,23 @@
+/**
+ * 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) {
+        ListNode newHead = null;
+        while (head != null) {
+            ListNode next = head.next;
+            head.next = newHead;
+            newHead = head;
+            head = next;
+        }
+        return newHead;
+    }
+}