Объект, отправленный между клиентом и сервером в JavaFX, не показывает значения в GUI

Question

Я создал программу JavaFX, которая использует два основных класса: клиентский и серверный класс. Я создал класс Values, который используется для отправки значений туда и обратно. Однако, когда я использую objectinputstream на стороне клиента для чтения значений, в то время как код выполняется без ошибок, в текстовой области значения не отображаются. Кто-нибудь может помочь?

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;
import static javafx.application.Application.launch;




public class TASK4FINAL extends Application {

    ObjectOutputStream ClientData;
    ObjectInputStream ServerData;

    public void start(Stage primaryStage) throws IOException {


        primaryStage.setTitle("ALSET's Calculator");
        Label label1 = new Label("Distance in Miles :");
        Label label2 = new Label("Fuel Efficiency in MPG :");
        Label label3 = new Label("Cost per litre :");
        Label label4 = new Label("Calculated Values: ");
        Label label5 = new Label("");

        RadioButton rb1 = new RadioButton("98 Octane - Cost: £1.03");
        RadioButton rb2 = new RadioButton("Diesel - Cost: £1.05");

        ToggleGroup togglegroup = new ToggleGroup();

        rb1.setToggleGroup(togglegroup);
        rb2.setToggleGroup(togglegroup);

        TextField text1 = new TextField();
        TextField text2 = new TextField();

        Button bt1 = new Button("Enter");
        Button bt2 = new Button("Clear");
        TextArea textarea = new TextArea();
        textarea.setPrefRowCount(19);
        textarea.setPrefColumnCount(19);

        try{
            Socket socket = new Socket("localhost", 5023);
            ServerData = new ObjectInputStream(socket.getInputStream());
            ClientData = new ObjectOutputStream(socket.getOutputStream());

        } catch (Exception e) {
            e.printStackTrace();
        }

        bt1.setOnAction(event -> {
            try{
                double num1 = Double.parseDouble(text1.getText()); 
                double num2 = Double.parseDouble(text2.getText());
                double rb_choice;
                if (rb1.isSelected()){
                    rb_choice = 1;
                }
                if (rb2.isSelected()){
                    rb_choice = 2;
                }
                togglegroup.getUserData();
                Values value = new Values(num1, num2, rb_choice, 0.1);
                ClientData.writeObject(value);
                Values server_object = (Values) ServerData.readObject();
                textarea.setText("Trip Distance:  " + text1.getText() + " miles" + "\n\nFuel Efficiency: " + text2.getText() + " MPG" + "\n\nTotal Cost: " + server_object.get_output() + "GBP");
                ClientData.flush();

            } catch (IOException e) {

                e.printStackTrace();

            } catch (NumberFormatException e) {

                label5.setText("Error Message: ");

            } catch (ClassNotFoundException ex) {
                ex.printStackTrace();
            }

        });

        bt2.setOnAction(event -> {

            text1.clear();

            text2.clear();

            togglegroup.selectToggle(null);

            textarea.clear();

        });


        GridPane gridpane = new GridPane();

        VBox vbox = new VBox();

        gridpane.setMinSize(500, 400);

        gridpane.setHgap(10);

        gridpane.setVgap(10);

        gridpane.add(label1,0,1);
        gridpane.add(text1, 1, 1);
        gridpane.add(label2, 0, 2);
        gridpane.add(text2,1,2);
        gridpane.add(label3,0,3);
        gridpane.add(label4,1,3);
        gridpane.add(rb1,0,4);
        gridpane.add(rb2,0,5);
        gridpane.add(bt1,0,6);
        gridpane.add(bt2,1,6);
        gridpane.add(textarea,1,4);
        gridpane.setAlignment(Pos.CENTER);
        gridpane.setPadding(new Insets(10, 10, 10, 10));

        StackPane root = new StackPane();
        root.getChildren().add(gridpane);

        Scene scene = new Scene(root, 600, 600);

        primaryStage.setScene(scene);
        primaryStage.show();

    }

    /**
     * @param args the command line arguments
     */

    public static void main(String[] args) {

        launch(args);

    }
}

class Values implements Serializable {
    double distance;
    double efficiency;
    double CPL;
    double gallon_number;
    double output;
    Values(double distance, double efficiency, double CPL, double output){
        this.distance = distance;
        this.efficiency = efficiency;
        this.CPL = CPL;
        this.output = output;

    }
    public void set_distance(double distance){
        this.distance = distance;
    }
    public void set_efficiency(double efficiency){
        this.efficiency = efficiency;
    }
    public void set_CPL(double CPL){
        this.CPL = CPL;
    }
    public void set_output(double output){
        this.output = output;
    }
    public double get_distance(){
        return this.distance;
    }
    public double get_efficiency(){
        return this.efficiency;
    }
    public double get_CPL(){
        return this.CPL;
    }
    public double get_output(){
        this.distance = distance;
        this.efficiency = efficiency;
        this.gallon_number = distance/efficiency;
        this.CPL = CPL;
        this.output = CPL*gallon_number;
        return this.output;
    }
}

class Values_server{
    double output;
    Values_server(double output){
        this.output = output;
    }
    public void set_output(double output){
        this.output = output;
    }
    public double get_output(){
        return this.output;
    }
}
class Server {
    public static void main(String[] args) throws ClassNotFoundException{
        try {
            System.out.println("Server Ready");
            ServerSocket ss = new ServerSocket(5023);
            System.out.println("Server is waiting for client request");
            Socket socket = ss.accept();
            System.out.println("Client connected: ");
            ObjectInputStream ClientData = new ObjectInputStream(socket.getInputStream());
            ObjectOutputStream ServerData = new ObjectOutputStream(socket.getOutputStream());
            Values client_values = (Values) ClientData.readObject();
            double output;
            output = (client_values.get_CPL() * (client_values.get_distance()/client_values.get_efficiency()));
            double CPL;
            double efficiency;
            double distance;
            CPL = client_values.get_CPL();
            efficiency = client_values.get_efficiency();
            distance = client_values.get_distance();
            Values server_values = new Values(distance, efficiency, CPL, output);
            ServerData.writeObject(server_values);

            while(true) {
                double number = client_values.get_CPL(); 
                double index_array;
                if (number == 1){
                    index_array = 0;
                }
                else if (number == 2){
                    index_array = 1;
                }
                ArrayList<String> array = new ArrayList<String>();
                try {
                    client_values.get_CPL();
                    FileWriter csvWriter = new FileWriter("output.csv");
                    csvWriter.append("Distance");
                    csvWriter.append(",");
                    csvWriter.append(Double.toString(client_values.get_distance()));
                    csvWriter.append(",\n");
                    csvWriter.append("Efficiency");
                    csvWriter.append(",");
                    csvWriter.append(Double.toString(client_values.get_efficiency()));
                    csvWriter.append(",\n");
                    csvWriter.append("CPL");
                    csvWriter.append(",");
                    csvWriter.append(Double.toString(client_values.get_CPL()));
                    csvWriter.append(",\n");
                    csvWriter.append("Output");
                    csvWriter.append(",");
                    csvWriter.append(Double.toString(output));
                    csvWriter.flush();
                    csvWriter.close();


                } catch(IOException e) {
                    e.printStackTrace();
                }

                ss.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }    
}