@FXML
  public void initialize() {
    gruppenGroesseText.setText(String.valueOf(Inputs.getGroupSize()));
    groupCountField.setText(String.valueOf(Inputs.getGroupCount()));
    if (!Inputs.isUseGroupSize()) {
      gruppenAnzahlRadio.setSelected(true);
    }

    // **für Testzwecke
    ObservableList<String> classList = FXCollections.observableArrayList("ibw2h14a", "ibd2h14b");
    klasseAuswaehlenBox.setItems(classList);

    System.out.println("init");
    // **
  }
 @FXML
 void setGroupCount() {
   String pipeline = groupCountField.getText();
   if (isInteger(pipeline)) {
     Inputs.setGroupCount(Integer.parseInt(pipeline));
   }
 }
 @FXML
 void addGruppenGroesse() {
   String pipeline = gruppenGroesseText.getText();
   if (isInteger(pipeline)) {
     Inputs.setGroupSize(Integer.parseInt(pipeline));
   }
 }
 @FXML
 void gruppenGroesseClicked() {
   Inputs.setUseGroupSize(true);
 }
 @FXML
 void gruppenAnzahlClicked() {
   Inputs.setUseGroupSize(false);
 }