Method to take in a string sentence and reverse the tokens

**ksahakian21** · April 25th, 2012, 04:28 PM

import java.util.StringTokenizer;
 
public class StringTokens{
 
  public String reverseWords(String sentence){
    StringTokenizer tokens = new StringTokenizer(sentence);
    String result = "";
 
    while(tokens.hasMoreTokens()){
      String[] t = new String[10];
      for(int j = 0; j < sentence.length(); j++){
        t[j] = tokens.nextToken();
      }
      for(int k = sentence.length()-1; k >= 0; k--){
        result = result + t[k];
      }
    }
    return result;
  }
}

The code above compiles but then gives me an error saying "java.util.NoSuchElementException" I believe referring to line 12

t[j] = tokens.nextToken();

**KucerakJM** · April 25th, 2012, 05:11 PM

This error comes from how you have the for loop set up. Lets say that sentence = "hello how are you doing today". The length of sentence would be 29 and your loop would therefore use the numbers 0 thru 28. In this case, this would be a problem on 2 fronts:
1) There are only 6 tokens in "hello how are you doing today"
2) The size of t is only 10
So, once the loop gets to j = 6, the tokens in the sentence have already been added and there are no more left hence the error.

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