Merge pull request larissalages#48 from catw101/master

Added leetcode problem and solution: Reverse Linked List in Java.

Author: larissalages

leetcode/java/linkedlist/206.java

@@ -0,0 +1,24 @@
+/**
+ * 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 prev = null;
+        ListNode cur = head;
+        ListNode nxt = null;
+        while (cur != null) {
+            nxt = cur.next;
+            cur.next = prev;
+            prev = cur;
+            cur = nxt;
+        }
+        return prev;
+    }
+}