I can't populate a TableView. NullPointerException in TableView

Question

Hi all.
I'm having a lot of problems to populate a table with data.
The following is my code:
public class Panel_MarcadoresController implements Initializable {
    @FXML static Tab lineas;
    @FXML TabPane marcadores;
    @FXML Button finalizarPolilinea;
    @FXML ComboBox comboGrosorLinea;
    @FXML TableView<CoordenadasLinea> tablaCoordenadasDeLinea;
    @FXML TableColumn itemCol;
    @FXML TableColumn latitudCol;
    @FXML TableColumn longitudCol;
   @Override
    public void initialize(URL url, ResourceBundle rb)
    public void leerCoordenadasLineaDesdeMapa(String datos)
        Pattern p = Pattern.compile("[,]+");
        String[] result = p.split(datos);
        ObservableList<CoordenadasLinea> dataCoordLinea = FXCollections.observableArrayList();
        int item = 0;
        String latitud = "";
        String longitud  = "";
        for (int i = 0; i < result.length; i++)
            item =  i;
            latitud = result;
longitud = result [i];
CoordenadasLinea coordenadasLinea = new CoordenadasLinea(latitud,longitud);
dataCoordLinea.add(coordenadasLinea);
tablaCoordenadasDeLinea.setItems(dataCoordLinea);
///// The following is a inner class
public class CoordenadasLinea
//private final SimpleIntegerProperty item = new SimpleIntegerProperty();
private final SimpleStringProperty latitud = new SimpleStringProperty("");
private final SimpleStringProperty longitud = new SimpleStringProperty("");
public CoordenadasLinea()
this("","");
public CoordenadasLinea(String lat, String Long)
setLatitud(lat);
setLongitud(Long);
// public void setItem(int it)
// item.set(it);
public void setLatitud(String lat)
latitud.set(lat);
public void setLongitud(String lon)
longitud.set(lon);
// public int getItem()
// return item.get();
public String getLatitud()
return latitud.get();
public String getlongitud()
return longitud.get();
My FXML file:<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.net.*?>
<?import java.util.*?>
<?import javafx.collections.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.collections.*?>
<?import javafx.geometry.Insets?>
<?import java.lang.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.control.cell.*?>
<?import javafx.scene.layout.*?>
<?import fxmltableview.*?>
<AnchorPane id="AnchorPane" prefHeight="798.0" prefWidth="426.0" styleClass="mainFxmlClass, frame" xmlns:fx="http://javafx.com/fxml" fx:controller="signa.Panel_MarcadoresController">
<children>
<TableView fx:id="coordenadasDeLinea" layoutX="47.0" layoutY="436.0" prefHeight="138.0" prefWidth="317.0">
<columns>
<TableColumn prefWidth="75.0" text="Item" fx:id="itemCol"/>
<TableColumn prefWidth="120.0" text="Latitud" fx:id="latitudCol" >
<cellValueFactory>
<PropertyValueFactory property="latitud" />
</cellValueFactory>
</TableColumn>
<TableColumn prefWidth="120.0" text="Longitud" fx:id="longitudCol" >
<cellValueFactory>
<PropertyValueFactory property="longitud" />
</cellValueFactory>
</TableColumn>
</columns>
</TableView>
</children>
<layoutY>
<Long fx:value="0" />
</layoutY>
<stylesheets>
<URL value="@SIGNA.css" />
</stylesheets>
</AnchorPane>
The idea is that the table is filled with the data that is passed as a parameter to the method.
I've tried everything and I can't ... with this last code I present here, I get this exception: 
Exception in thread "Thread-5" java.lang.NullPointerException
at signa.Panel_MarcadoresController.leerCoordenadasLineaDesdeMapa(Panel_MarcadoresController.java:122)   this points here: tablaCoordenadasDeLinea.setItems(dataCoordLinea); I think I'm making a basic error but I'm locked ... help                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

Here I am calling the changeMap
public class ClientExecution implements Runnable
    private Socket socket;
    //private Panel_MarcadoresController controladorDePanel;
    //Given what you said, I tried to do this
    public ClientExecution( Socket socket, Panel_MarcadoresController contPanel)
           this.socket = socket;
        this.controladorDePanel = contPanel;
    public void run ()
        try
             String instruccion ="";
             String datos="";
             EvaluateInput evaluateInput = new EvaluateInput(controladorDePanel);
             evaluateInput.changeMap(instruccion, datos);     
        catch (IOException e)
         {             e.printStackTrace();          }
}I made this change in EvaluateInput:
public  class EvaluateInput extends Evaluate
    private String datos;
    private Panel_MarcadoresController controladorMarcadores;
    public EvaluateInput (Panel_MarcadoresController contMarcadores)
        this.controladorMarcadores = contMarcadores;
    public EvaluateInput()
    public void changeMap(String instruccion, String datos)
        Pattern p = Pattern.compile("[,]+");
        String[] result = p.split(datos);
        switch(instruccion)
            case "@SELECT_OPEATIONAL_ AREA#" :
                CODE...
            break;
            case "@CLOSE_POLYLINE_VALUES#" :
                   controladorMarcadores.leerCoordenadasLineaDesdeMapa(datos);
            break;
}Here I invoke the class ClientExecution
public class SocketCatcherClients implements Runnable  
     Panel_MarcadoresController controladorMarcadores;
     public SocketCatcherClients(Panel_MarcadoresController contMarcadores)
        this.controladorMarcadores = contMarcadores;
   public void run()
       try
          Runnable nuevoCliente = new ClientExecution(cliente, controladorMarcadores); //Here I tried to pass the object
          Thread hilo = new Thread(nuevoCliente);
          hilo.start();
        }catch (Exception e)
             e.printStackTrace();
}Finally, I made this change in Main class...
public class Main extends Application {
     public static void main(String[] args) {
        Application.launch(Main.class, (java.lang.String[])null);
public void start(Stage primaryStage) {
        try {
                 CODE...
                 FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Panel_Marcadores.fxml"));
                 Panel_MarcadoresController controller = (Panel_MarcadoresController) fxmlLoader.getController();   //This object appears NULL
                (new Thread(new SocketCatcherClients(controller))).start();
         catch (Exception ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}Debugging I found that the controller (Panel_MarcadoresController ) object is null