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

public class Starter extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(final Stage primaryStage) {

        primaryStage.setResizable(true);

        Button button = new Button("Button " + System.getProperty("java.version"));
        RadioButton radioButton = new RadioButton("RadioButton " + System.getProperty("java.version"));

        VBox vbox = new VBox(button, radioButton);
        vbox.getStyleClass().add("container");

        Scene scene = new Scene(vbox);

        scene.getStylesheets().add(getClass().getResource("/styles.css").toExternalForm());

        primaryStage.setScene(scene);

        primaryStage.show();
    }
}