Can't add data to table in javaFX

Can't add data to table in javaFX

As shown in the following code I tried to add some data i to the table.
But when I run the application it only just show the empty table. What is
the possible reason to thar problem. Please help
Thanks in advance.
package com.fg.transbridge.tool.ui;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
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.cell.PropertyValueFactory;
public class TableViewController implements Initializable {
@FXML
private TableColumn<Person, String> colX;
@FXML
private TableColumn<Person, String> colY;
@Override
public void initialize(URL arg0, ResourceBundle arg1) {
final TableView<Person> table = new TableView<Person>();
final ObservableList<Person> data =
FXCollections.observableArrayList(new Person("Jacob", "Smith"),
new Person("Isabella", "Johnson"), new Person("Ethan",
"Williams"),
new Person("Emma", "Jones"), new Person("Michael", "Brown"));
colX.setCellValueFactory(new PropertyValueFactory<Person,
String>("firstName"));
colY.setCellValueFactory(new PropertyValueFactory<Person,
String>("lastName"));
table.setItems(data);
table.getColumns().addAll(colX, colY);
}
public static class Person {
private final SimpleStringProperty firstName;
private final SimpleStringProperty lastName;
private Person(String fName, String lName) {
this.firstName = new SimpleStringProperty(fName);
this.lastName = new SimpleStringProperty(lName);
}
public String getFirstName() {
return firstName.get();
}
public void setFirstName(String fName) {
firstName.set(fName);
}
public String getLastName() {
return lastName.get();
}
public void setLastName(String fName) {
lastName.set(fName);
}
}
}
fxml file has the folliwing code and some more..
TableView.fxml
<TableView layoutX="172.0" layoutY="106.0" prefHeight="200.0"
prefWidth="200.0">
<columns>
<TableColumn prefWidth="75.0" text="Column X" fx:id="colX" />
<TableColumn prefWidth="75.0" text="Column Y" fx:id="colY"/>
</columns>
</TableView>