Length of Last Word

 1 public class Solution {
 2     public int lengthOfLastWord(String s) {
 3         // IMPORTANT: Please reset any member data you declared, as
 4         // the same Solution instance will be reused for each test case.
 5         if(s == null)
 6             return 0;
 7         char[] mychar = s.trim().toCharArray();
 8         int count = 0;
 9         for(int i=0; i<mychar.length; i++)
10         {
11             char tmp = mychar[i];
12             if(tmp == ' ')
13                 count = 0;
14             else if((tmp >= 'A' && tmp <= 'Z')||(tmp >= 'a' && tmp <= 'z'))
15                 count++;
16             else{
17                 count = 0;
18                 do{i++;}while(mychar[i] != ' '&&i<mychar.length);
19             }
20         }
21         return count;
22     }
23 }