refactor 387

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_387.java

@@ -1,38 +1,29 @@
 package com.fishercoder.solutions;
 
 /**
- * 387. First Unique Character in a String
- * Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.
-
- Examples:
-
- s = "leetcode"
- return 0.
-
- s = "loveleetcode",
- return 2.
- Note: You may assume the string contain only lowercase letters.
-
+ * 387. First Unique Character in a String Given a string, find the first non-repeating character in
+ * it and return it's index. If it doesn't exist, return -1.
+ *
+ * Examples:
+ *
+ * s = "leetcode" return 0.
+ *
+ * s = "loveleetcode", return 2. Note: You may assume the string contain only lowercase letters.
  */
 
 public class _387 {
-
+  public static class Solution1 {
     public static int firstUniqChar(String s) {
-        int[] freq = new int[26];
-        for (int i = 0; i < s.length(); i++) {
-            freq[s.charAt(i) - 'a']++;
+      int[] freq = new int[26];
+      for (int i = 0; i < s.length(); i++) {
+        freq[s.charAt(i) - 'a']++;
+      }
+      for (int i = 0; i < s.length(); i++) {
+        if (freq[s.charAt(i) - 'a'] == 1) {
+          return i;
         }
-        for (int i = 0; i < s.length(); i++) {
-            if (freq[s.charAt(i) - 'a'] == 1) {
-                return i;
-            }
-        }
-        return -1;
-    }
-
-    public static void main(String... strings) {
-        String s = "leetcode";
-        System.out.println(firstUniqChar(s));
+      }
+      return -1;
     }
-
+  }
 }