How do I use radio buttons groups in javafx?

Question

I need to make a group of 2 radio buttons and then retrieve the value of the selected one.

Answer 1

Simply use a ToggleGroup

RadioButton radioButton1 = ...
RadioButton radioButton2 = ...

// TODO: add RadioButtons to scene

ToggleGroup toggleGroup = new ToggleGroup();

radioButton1.setToggleGroup(toggleGroup);
radioButton2.setToggleGroup(toggleGroup);

// listen to changes in selected toggle
toggleGroup.selectedToggleProperty().addListener((observable, oldVal, newVal) -> System.out.println(newVal + " was selected"));

You can also retrieve the selected radio button from the ToggleGroup using

toggleGroup.getSelectedToggle()

in case you want to do this from the handler of a submit button or something like that...