Poetry Emitter encode() method

PoetryEmitter.java

import org.apache.commons.codec.language.DoubleMetaphone;


   public String encode(String line) {
      DoubleMetaphone codec = new DoubleMetaphone();
      List<String> words = new ArrayList<String>();

      StringTokenizer st = new StringTokenizer(line);
      while(st.hasMoreTokens()) {
         String word = st.nextToken();
         words.add(codec.encode(word));
      }

      StringBuilder sb = new StringBuilder();
      for(String word : words) {
         sb.append(word);
         sb.append(" ");
      }

      return sb.toString();
   }