How to find index or information of clicked RadioButton - for-loop

Question

I was wondering if there was anyway to either find the index when a certain RadioButton is pressed or to pass myBuns.get(i) when the RadioButton. Using the code below to create the RadioButtons
RadioButton rButton;
for (i = 0; i < myBuns.size(); i ++){
rButton = new RadioButton("" + myBuns.get(i));
rButton.setToggleGroup(bunGroup);
rButton.setOnAction(this);
this.getChildren().add(rButton);
}
Thanks for any help or suggestions!

Answer 1

You can get the index of the selected toggle using:
toggleGroup.getToggles().indexOf(toggleGroup.getSelectedToggle());
And the text of the selected toggle using:
((RadioButton) toggleGroup.getSelectedToggle()).getText();
By placing the code in the change listener for the selected toggle property, you can monitor when the selected toggle changes and take action as appropriate.
Sample App
import javafx.application.Application;
import javafx.collections.*;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import java.util.stream.*;
public class ToggleIndexer extends Application {
#Override
public void start(final Stage stage) throws Exception {
ToggleGroup toggleGroup = new ToggleGroup();
ObservableList<RadioButton> buttons = IntStream.range(0, 5)
.mapToObj(i -> new RadioButton("Radio " + i))
.collect(Collectors.toCollection(FXCollections::observableArrayList));
toggleGroup.getToggles().setAll(buttons);
Label selectedIndex = new Label();
selectedIndex.setFont(Font.font("monospace"));
Label selectedItem = new Label();
selectedItem.setFont(Font.font("monospace"));
toggleGroup.selectedToggleProperty().addListener((observable, oldValue, newValue) -> {
if (newValue == null) {
selectedIndex.setText("");
selectedItem.setText("");
} else {
final int selectedIndexValue =
toggleGroup.getToggles().indexOf(newValue);
selectedIndex.setText("Selected Index: " + selectedIndexValue);
final String selectedItemText =
((RadioButton) toggleGroup.getSelectedToggle()).getText();
selectedItem.setText( "Selected Item: " + selectedItemText);
}
});
VBox layout = new VBox(8);
layout.setPadding(new Insets(10));
layout.setPrefWidth(250);
layout.getChildren().setAll(buttons);
layout.getChildren().addAll(selectedItem, selectedIndex);
stage.setScene(new Scene(layout));
stage.show();
}
public static void main(String[] args) throws Exception {
launch(args);
}
}