updated

package application;
import java.net.URL;
import java.util.ResourceBundle;

import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.scene.control.ToggleButton;
import javafx.scene.control.ToggleGroup;
import javafx.stage.Stage;



// Setting up the window
public class MainController extends Application implements Initializable  {

    @FXML
    private TextField inputCSP;

    @FXML
    private RadioButton callBox1;

    @FXML
    private RadioButton putBox1;




    public void start(Stage primaryStage) throws Exception {

        final ToggleGroup group2 = new ToggleGroup();
        callBox1.setToggleGroup(group2);
        putBox1.setToggleGroup(group2);
        callBox1.setSelected(true);




        Parent root = FXMLLoader.load(getClass().getResource(("/application/fxml.fxml")));
        Scene scene = new Scene(root, 640, 400);

        primaryStage.setScene(scene);
        primaryStage.setTitle("Black-Scholes Pricer (European Options) ");
        primaryStage.setResizable(false);
        primaryStage.show();








    }
    public static void main(String[] args) {
        launch(args);
    }
    public void initialize(URL arg0, ResourceBundle arg1) {

    }



}