refactor 234

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_234.java

@@ -5,20 +5,12 @@
 import java.util.ArrayList;
 import java.util.List;
 
-/**
- * 234. Palindrome Linked List
- *
- * Given a singly linked list, determine if it is a palindrome.
-
- Follow up:
- Could you do it in O(n) time and O(1) space?
- */
-
 public class _234 {
     public static class Solution1 {
-        /**O(n) time
+        /**
+         * O(n) time
          * O(1) space
-         * */
+         */
         public boolean isPalindrome(ListNode head) {
             if (head == null) {
                 return true;
@@ -56,9 +48,10 @@ private ListNode reverse(ListNode head) {
     }
 
     public static class Solution2 {
-        /**O(n) time
+        /**
+         * O(n) time
          * O(n) space
-         * */
+         */
         public boolean isPalindrome(ListNode head) {
             int len = 0;
             ListNode fast = head;