*Reverse Words in a String

 1 public class Solution {
 2     public String reverseWords(String s) 
 3     {
 4         if (s == null || s.length() == 0) 
 5         {
 6             return "";
 7         }
 8         StringBuilder sb = new StringBuilder();
 9         String[] string = s.split(" ");
10         for (int i= string.length-1;i>=0;i--)
11         {
12             if(!string[i].equals(""))
13             sb.append(string[i]).append(" ");
14         }
15         
16         return sb.length() == 0 ? "" : sb.substring(0, sb.length() - 1);
17         
18         
19     }
20 }