Algo #112: Number to Words

Problem Statement:
       Given a number convert it to words.
         
e.g. 1327  as One thousand three hundred twenty seven


Solution:

Implementation:
        

/**
 * Convert a given number to a word
 * @author PRATEEK
 */
public class NumberToWord {

 private static String ones[] = { " ", " one", " two", " three", " four",
   " five", " six", " seven", " eight", " Nine", " ten", " eleven",
   " twelve", " thirteen", " fourteen", "fifteen", " sixteen",
   " seventeen", " eighteen", " nineteen" };

 private static String tens[] = { " ", " ", " twenty", " thirty", " forty",
   " fifty", " sixty", "seventy", " eighty", " ninety" };

 
 private static void word(StringBuilder result , int val, String place) {
  if (val > 19)
   result.append(tens[val / 10] + " " + ones[val % 10]);
  else
   result.append(ones[val]);
  if (val > 0)
   result.append(place);
 }

 public static String convertToWord(int num)
 {
  if (num <= 0)
   return "";
  
  StringBuilder result = new StringBuilder("");
  word(result, num / 1000000000, " Hundred");
  word(result, (num / 10000000) % 100, " crore");
  word(result ,(num / 100000) % 100, " lakh");
  word(result, (num / 1000) % 100, " thousand");
  word(result,(num / 100) % 10, " hundred");
  word(result,num % 100, " ");
  System.out.println(num + " --> "+result.toString().trim());
  return result.toString().trim();
 }
 
 public static void main(String[] args) {
  convertToWord(117);
  convertToWord(1327);
 }
}

Please post your comments and suggestions.
Happy Coding !! :)