przycisk opcji Lambda Javafx

radioButton.selectedProperty().addListener(new ChangeListener<Boolean>() {
    @Override
    public void changed(ObservableValue<? extends Boolean> obs, Boolean wasPreviouslySelected, Boolean isNowSelected) {
        if (isNowSelected) { 
            // ...
        } else {
            // ...
        }
    }
});
Upset Unicorn