Can't populate data to TableView in javafx

Question

I am a newcomer to javafx, I'm developing a small app for a library that should show some data in a table, but data aren't showed in the table anyway !, I've searched and made it exactly as its supposed to be, still not populating at all.

note : DBConnection is a class that connects to the database, I could read data from it without any problem.

main class :

package app;

import Connector.DBConnection;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import java.io.IOException;
import java.sql.Connection;

public class Main extends Application {
    private Connection connection;
    private Parent root;

    @Override
    public void start(Stage primaryStage) throws Exception{
        primaryStage.getIcons().add(new Image(String.valueOf(this.getClass().getResource("icon.png"))));
      /*  if(!logIn())
            return;*/
        connection = DBConnection.getActiveConnection();
        FXMLLoader loader = new FXMLLoader(getClass().getResource("main_screen.fxml"));
    //    loader.setLocation(getClass().getResource("main_screen.fxml"));
        Parent root = (VBox) loader.load();


        MainMenuController menuController = loader.getController();

        menuController.setConnection(connection);
        menuController.init();
        menuController.fillTable();

     //   Parent root = FXMLLoader.load(getClass().getResource("main_screen.fxml"));

        primaryStage.setTitle("Hello World");

        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }


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

controller class :

package app;


import com.sun.org.omg.CORBA.Initializer;
import javafx.collections.FXCollections;
import javafx.collections.ObservableArray;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import models.Book;
import models.Borrower;
import models.History;

import java.net.URL;
import java.sql.*;
import java.util.ResourceBundle;

public class MainMenuController {
    private Connection connection;
    private final int BOOK_VEIW_COLUMN_COUNT = 9;
    private ObservableList<Book> bookData;

    @FXML
    private TableView<Book> bookView;
    @FXML
    private TableView<History> historyView;
    @FXML
    private TableView<Borrower> borrowerView;
    @FXML
    private TableColumn<Book, Integer> first;
    @FXML
    private TableColumn<Book, String> second;
    @FXML
    private TableColumn<Book, String> third;
    @FXML
    private TableColumn<Book, String> forth;
    @FXML
    private TableColumn<Book, String> fifth;
    @FXML
    private TableColumn<Book, String> sixth;
    @FXML
    private TableColumn<Book, Integer> seventh;
    @FXML
    private TableColumn<Book, Integer> eighth;
    @FXML
    private TableColumn<Book, Integer> ninth;

    public void init(){
        bookData = FXCollections.observableArrayList();
        bookView = new TableView<>();
        first.setCellValueFactory(cellData -> cellData.getValue().numberProperty().asObject());
        second.setCellValueFactory(cellData -> cellData.getValue().nameProperty());
        third.setCellValueFactory(cellData -> cellData.getValue().authorProperty());
        forth.setCellValueFactory(cellData -> cellData.getValue().mainTopicProperty());
        fifth.setCellValueFactory(cellData -> cellData.getValue().secondaryTopicProperty());
        sixth.setCellValueFactory(cellData -> cellData.getValue().divisionProperty());
        seventh.setCellValueFactory(cellData -> cellData.getValue().codeNumberProperty().asObject());
        eighth.setCellValueFactory(cellData -> cellData.getValue().copiesProperty().asObject());
        ninth.setCellValueFactory(cellData -> cellData.getValue().availCopiesProperty().asObject());
    }

    public void setConnection(Connection connection){
        this.connection = connection;
    }

    public void fillTable(){
        try {
            String sql = "select * from books";
            PreparedStatement statement = connection.prepareStatement(sql);
            ResultSet set = statement.executeQuery();
            int currNumber = 1;
            while(set.next()){
                Book book = new Book.BookBuilder()
                        .setAuthor(set.getString("author"))
                        .setAvailCopies(set.getInt("available copies"))
                        .setDivision(set.getString("division"))
                        // .setHistory(set.getString(""))
                        .setSecondaryTopic(set.getString("secondary topic"))
                        .setCopies(set.getInt("copies"))
                        .setID(set.getInt("id"))
                        .setNumber(currNumber++)
                        .setName(set.getString("name"))
                        .setMainTopic(set.getString("main topic"))
                        .setCodeNumber(set.getInt("code number"))
                        .build();
                bookData.add(book);
            }
      //      bookView.getColumns().addAll(first, second, third, forth, fifth, sixth, seventh, eighth, ninth);
            bookView.setItems(bookData);

            //       bookView.getColumns().addAll(first, second, third, forth, fifth, sixth, seventh, eighth, ninth);
        }catch (Exception e){
            e.printStackTrace();
        }
    }

}

fxml file :

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.CheckBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.Separator?>
<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.Region?>
<?import javafx.scene.layout.VBox?>

<?import javafx.scene.control.cell.PropertyValueFactory?>
<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="619.0" prefWidth="1019.0" xmlns="http://javafx.com/javafx/8.0.60" xmlns:fx="http://javafx.com/fxml/1" fx:controller="app.MainMenuController">
   <children>
      <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="150.0" prefWidth="600.0">
                       <children>
                          <TableView fx:id="bookView" editable="true" layoutX="200.0" layoutY="-40.0" nodeOrientation="RIGHT_TO_LEFT" prefHeight="302.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
                            <columns>
                                <TableColumn fx:id="first" prefWidth="65.0" text="عدد" />
                              <TableColumn fx:id="second" prefWidth="175.0" text="الاسم" />
                              <TableColumn fx:id="third" prefWidth="61.0" text="المؤلف" />
                                <TableColumn fx:id="forth" prefWidth="75.0" text="الموضوع الرئيسى" />
                                <TableColumn fx:id="fifth" prefWidth="75.0" text="الموضوع الفرعى" />
                                <TableColumn fx:id="sixth" prefWidth="75.0" text="رقم التقسيم" />
                                <TableColumn fx:id="seventh" prefWidth="75.0" text="الرقم الكودى" />
                                <TableColumn fx:id="eighth" prefWidth="75.0" text="عدد النسخ" />
                                <TableColumn fx:id="ninth" prefWidth="339.0" text="النسخ المتوفره" />
                            </columns>
                             <columnResizePolicy>
                                <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
                             </columnResizePolicy>
                          </TableView>
                       </children>
                    </AnchorPane>
   </children>
</VBox>

Book class: "using builder pattern"

package models;

import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;

/**
 * Created by Andy on 6/21/2016.
 */
public class Book {
    private IntegerProperty number;
    private StringProperty name;
    private StringProperty author;
    private StringProperty mainTopic;
    private StringProperty secondaryTopic;
    private StringProperty division;
    private IntegerProperty codeNumber;
    private IntegerProperty ID;
    private IntegerProperty copies;
    private IntegerProperty availCopies;
    private ObservableList<History> history = FXCollections.observableArrayList();

    public Book(IntegerProperty number, StringProperty name, StringProperty author, StringProperty mainTopic, StringProperty secondaryTopic, StringProperty division, IntegerProperty codeNumber, IntegerProperty ID, IntegerProperty copies, IntegerProperty availCopies, ObservableList<History> history) {
        this.number = number;
        this.name = name;
        this.author = author;
        this.mainTopic = mainTopic;
        this.secondaryTopic = secondaryTopic;
        this.division = division;
        this.codeNumber = codeNumber;
        this.ID = ID;
        this.copies = copies;
        this.availCopies = availCopies;
        this.history = history;
    }

    public int getNumber() {
        return number.get();
    }

    public IntegerProperty numberProperty() {
        return number;
    }

    public void setNumber(int number) {
        this.number.set(number);
    }

    public String getName() {
        return name.get();
    }

    public StringProperty nameProperty() {
        return name;
    }

    public void setName(String name) {
        this.name.set(name);
    }

    public String getAuthor() {
        return author.get();
    }

    public StringProperty authorProperty() {
        return author;
    }

    public void setAuthor(String author) {
        this.author.set(author);
    }

    public String getMainTopic() {
        return mainTopic.get();
    }

    public StringProperty mainTopicProperty() {
        return mainTopic;
    }

    public void setMainTopic(String mainTopic) {
        this.mainTopic.set(mainTopic);
    }

    public String getSecondaryTopic() {
        return secondaryTopic.get();
    }

    public StringProperty secondaryTopicProperty() {
        return secondaryTopic;
    }

    public void setSecondaryTopic(String secondaryTopic) {
        this.secondaryTopic.set(secondaryTopic);
    }

    public String getDivision() {
        return division.get();
    }

    public StringProperty divisionProperty() {
        return division;
    }

    public void setDivision(String division) {
        this.division.set(division);
    }

    public int getCodeNumber() {
        return codeNumber.get();
    }

    public IntegerProperty codeNumberProperty() {
        return codeNumber;
    }

    public void setCodeNumber(int codeNumber) {
        this.codeNumber.set(codeNumber);
    }

    public int getID() {
        return ID.get();
    }

    public IntegerProperty IDProperty() {
        return ID;
    }

    public void setID(int ID) {
        this.ID.set(ID);
    }

    public int getCopies() {
        return copies.get();
    }

    public IntegerProperty copiesProperty() {
        return copies;
    }

    public void setCopies(int copies) {
        this.copies.set(copies);
    }

    public int getAvailCopies() {
        return availCopies.get();
    }

    public IntegerProperty availCopiesProperty() {
        return availCopies;
    }

    public void setAvailCopies(int availCopies) {
        this.availCopies.set(availCopies);
    }

    public ObservableList<History> getHistory() {
        return history;
    }

    public void setHistory(ObservableList<History> history) {
        this.history = history;
    }

    public static class BookBuilder{
        private IntegerProperty number;
        private StringProperty name;
        private StringProperty author;
        private StringProperty mainTopic;
        private StringProperty secondaryTopic;
        private StringProperty division;
        private IntegerProperty codeNumber;
        private IntegerProperty ID;
        private IntegerProperty copies;
        private IntegerProperty availCopies;
        private ObservableList<History> history = FXCollections.observableArrayList();
        private final Integer DEFAULT_COPIES_NUMBER = 1;

        public BookBuilder(){
            name = new SimpleStringProperty("");
            author = new SimpleStringProperty("");
            mainTopic = new SimpleStringProperty("");
            secondaryTopic = new SimpleStringProperty("");
            division = new SimpleStringProperty();
            codeNumber = new SimpleIntegerProperty();
            ID = new SimpleIntegerProperty();
            copies = new SimpleIntegerProperty(DEFAULT_COPIES_NUMBER);
            availCopies = new SimpleIntegerProperty(DEFAULT_COPIES_NUMBER);
            number = new SimpleIntegerProperty(DEFAULT_COPIES_NUMBER);
        }


        public BookBuilder setNumber(int number) {
            this.number.set(number);
            return this;
        }

        public BookBuilder setName(String name) {
            this.name.set(name);
            return this;
        }

        public BookBuilder setAuthor(String author) {
            this.author.set(author);
            return this;
        }

        public BookBuilder setMainTopic(String mainTopic) {
            this.mainTopic.set(mainTopic);
            return this;
        }

        public BookBuilder setSecondaryTopic(String secondaryTopic) {
            this.secondaryTopic.set(secondaryTopic);
            return this;
        }

        public BookBuilder setDivision(String division) {
            this.division.set(division);
            return this;
        }

        public BookBuilder setCodeNumber(int codeNumber) {
            this.codeNumber.set(codeNumber);
            return this;
        }

        public BookBuilder setID(int ID) {
            this.ID.set(ID);
            return this;
        }

        public BookBuilder setCopies(int copies) {
            this.copies.set(copies);
            return this;
        }

        public BookBuilder setAvailCopies(int availCopies) {
            this.availCopies.set(availCopies);
            return this;
        }

        public BookBuilder setHistory(ObservableList<History> history) {
            this.history = history;
            return this;
        }

        public Book build(){
            return new Book(number, name, author, mainTopic, secondaryTopic, division, codeNumber, ID, copies, availCopies, history);
        }
    }
}

Answer 1

In your controller's init method you have

bookView = new TableView<>();

But you already have the TableView created by the FXML loader! From now on, all manipulations you do on bookView are made on this new instance, not the one shown in the scene. This means you are never adding the items to the TableView you see, but to a different table view, never shown.

Remove this line and your problem should be solved.