package com.sample.demos;

import static javafx.geometry.Pos.CENTER;

import java.io.FileNotFoundException;
import java.net.MalformedURLException;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.RadioButton;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class RadioButtonApp extends Application {

@Override
public void start(Stage primaryStage) throws FileNotFoundException, MalformedURLException {
  ToggleGroup toggleGroup = new ToggleGroup();

  RadioButton radioButton1 = new RadioButton("Java");
  radioButton1.setToggleGroup(toggleGroup);
  radioButton1.setSelected(true);

  RadioButton radioButton2 = new RadioButton("Python");
  radioButton2.setToggleGroup(toggleGroup);

  RadioButton radioButton3 = new RadioButton("Haskell");
  radioButton3.setToggleGroup(toggleGroup);

  VBox vBox = new VBox(10, radioButton1, radioButton2, radioButton3);
  vBox.setAlignment(CENTER);

  Scene scene = new Scene(vBox, 400, 400);

/* Set the scene to primaryStage, and call the show method */
  primaryStage.setTitle("JavaFX Radio Button Example");
  primaryStage.setScene(scene);
  primaryStage.show();
}

}

package com.sample.demos;

import javafx.application.Application;

public class TestFX {
public static void main(String args[]) {
  Application.launch(RadioButtonApp.class, args);
}
}