package com.eruite.test;

import java.util.StringTokenizer;

public class ReverseWords {
 public static String reverseWords(String str) {
  if (str == null || str.trim().equals(""))
   return null;
  StringTokenizer spaceToker = new StringTokenizer(str);
  String[] result = new String[spaceToker.countTokens()];
  int index = 0;
  while (spaceToker.hasMoreTokens()) {
   result[index] = spaceToker.nextToken();
   index++;
  }
  StringBuffer sb = new StringBuffer();
  for (int i = result.length - 1; i >= 0; i--)
   sb.append(result[i]+" ");
  return sb.toString();
 }

 public static void main(String[] args) {
  String str = "Do or do not, there is no try.";
  System.out.print(reverseWords(str));
 }
}