/** Save clear of moneyEntry. */
 public void clearMoney() {
   if (moneyField.getDocument() == moneyDocument) {
     moneyDocument.clear();
   } else {
     moneyField.setText("");
   }
 }
  public void setEnabled(boolean isEnabled) {
    setReadonly(!isEnabled);
    moneyField.setEditable(isEnabled);

    if (!isEnabled) {
      moneyField.setDocument(textDocument);
      moneyField.setText("");
    } else {
      moneyField.setDocument(moneyDocument);
    }
  }