@Override
  public void actionPerformed(ActionEvent e) {
    String begin = view.getTxtBeginWord().trim();
    int length = begin.length();
    boolean isFound = false;
    StringBuilder builder = new StringBuilder();
    if (model.isSimple()) {
      builder.append("Starting Words with " + begin + "\n\n");
    } else {
      builder.append("<h1 style='text-align: center; margin: 0px'> Starting Words</h1>");
      builder.append(
          String.format(
              "<p style='text-align: center; font-style: italic; margin: 5px; font-style: 30px'> with <b>%s</b> <p>",
              begin));
    }

    for (WordNode word : model.getWordNodes()) {
      int currentWordLength = word.getWord().length();
      if (length <= currentWordLength) {
        String currentStartWith = word.getWord().substring(0, length);
        if (currentStartWith.equals(begin)) {
          if (model.isSimple()) {
            builder.append(DisplayHelper.getWordAndContentSimple(word));
          } else {
            builder.append(DisplayHelper.getWordAndContentHTML(word));
          }
          isFound = true;
        }
      }
    }

    if (isFound) {
      if (model.isSimple()) {
        view.setDisplayFieldSimple(builder.toString());
        view.setSimpleDisplayViewToTop();
      } else {
        view.setDisplayFieldHTML(builder.toString());
        view.setDisplayFieldViewToTop();
      }
      view.clearLblFeedback();
    } else {
      view.setLblFeedback("Cannot find words starting with " + begin);
    }
  }
 public Object getValueAt(int rowIndex, int columnIndex) {
   WordNode word = model.getWordNodes()[rowIndex];
   if (columnIndex == 0) return word.getWord();
   else return word.getCount();
 }