Problème controleur JavaFX MVC

Bonjour à tous,

je suis débute en JavaFX, mon programme de test à pour but de mettre en place le modèle MVC et je rencontre un problème avec les controleurs.
Quand je clique sur le bouton (CenterControler) j'ai bien un message qui s'affiche sur mon label mais quand je clique sur File->Quit (MainControler) j'ai ce message :

Code:

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Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at javafx.fxml.FXMLLoader$MethodHandler.invoke(Unknown Source)
	at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(Unknown Source)
	at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
	at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
	at javafx.event.Event.fireEvent(Unknown Source)
	at javafx.scene.control.MenuItem.fire(Unknown Source)
	at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer.doSelect(Unknown Source)
	at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer.lambda$createChildren$324(Unknown Source)
	at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer$$Lambda$150/11109972.handle(Unknown Source)
	at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(Unknown Source)
	at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
	at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
	at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
	at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
	at javafx.event.Event.fireEvent(Unknown Source)
	at javafx.scene.Scene$MouseHandler.process(Unknown Source)
	at javafx.scene.Scene$MouseHandler.access$1500(Unknown Source)
	at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
	at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
	at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
	at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
	at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
	at com.sun.glass.ui.View.notifyMouse(Unknown Source)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source)
	at com.sun.glass.ui.win.WinApplication$$Lambda$37/1109371569.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at sun.reflect.misc.Trampoline.invoke(Unknown Source)
	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
	... 44 more
Caused by: java.lang.NullPointerException
	at controler.CenterControler.show(CenterControler.java:42)
	at controler.MainControler.onClick2(MainControler.java:45)
	... 53 more

Voici le code du Main.java

Code:

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package application;
 
import java.io.IOException;
 
import controler.CenterControler;
import controler.MainControler;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;
import javafx.scene.Parent;
import javafx.scene.Scene;
 
 
 
public class Main extends Application {
 
	CenterControler ctrl_Center;
	MainControler ctrl_Main;
 
	Stage primaryStage;
 
	@Override
	public void start(Stage primaryStage) throws IOException {
 
			FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("../view/themain.fxml"));
 
			Parent root = (Parent) fxmlLoader.load();
			ctrl_Main = (MainControler)fxmlLoader.getController();
 
	        Scene scene = new Scene(root, 800, 600);
 
	        primaryStage.setTitle("FXML Welcome");
	        primaryStage.setScene(scene);
	        primaryStage.show();
	}
 
	public static void main(String[] args) {
		launch(args);
	}
}

Voici le code de mon MainControler.java

Code:

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package controler;
 
import java.net.URL;
import java.util.ResourceBundle;
 
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
 
public class MainControler implements Initializable{
 
	@FXML
	private Menu File;
 
	@FXML
	private MenuBar barreMenu;
 
	@FXML
	private Menu sousMenu;
 
	@FXML
	private MenuItem menuQuit;
 
	@FXML
	private CenterControler centreControle;
 
 
	@Override
	public void initialize(URL location, ResourceBundle resources) {
		assert File != null : "fx:id=\"File\" was not injected: check your FXML file 'themain.fxml'.";
		assert menuQuit != null : "fx:id=\"menuQuit\" was not injected: check your FXML file 'themain.fxml'.";
	}
 
	public void setCenterControle(CenterControler cc)
	{
		this.centreControle = cc;
	}
 
	@FXML
	protected void onClick2()
	{
		centreControle = new CenterControler();
		centreControle.show("IT WORKS !!! FROM MAIN CONTROLER");
	}
}

Voici le fichier CenterControler.java

Code:

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package controler;
 
import java.net.URL;
import java.util.ResourceBundle;
 
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
 
public class CenterControler implements Initializable{
 
	@FXML
	private Button btn_1;
 
	@FXML
	private Label labelMSG;
 
	@Override
	public void initialize(URL arg0, ResourceBundle arg1) {
		assert btn_1 != null : "fx:id=\"btn_1\" was not injected: check your FXML file 'part2.fxml'.";
		assert labelMSG != null : "fx:id=\"labelMSG\" was not injected: check your FXML file 'part2.fxml'.";
	}
 
	public void setBTN(Button btn){ this.btn_1 = btn;}
 
	public void setLabel(Label lb) {this.labelMSG = lb; }
 
	public Button getBTN(){ return this.btn_1; }
 
	public Label getLabel(){ return this.labelMSG;}
 
	@FXML
	protected void onClickShowMSG()
	{
		labelMSG.setText("PUSH FROM CENTER CONTROLER");
	}
 
	public void show(String msg)
	{
		labelMSG.setText(msg);
	}
}

Le fichier themain.fxml

Code:

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<?xml version="1.0" encoding="UTF-8"?>
 
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.paint.*?>
<?import javafx.scene.text.*?>
 
<VBox prefHeight="400.0" prefWidth="640.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="controler.MainControler">
  <children>
    <MenuBar fx:id="barreMenu" VBox.vgrow="NEVER">
      <menus>
        <Menu fx:id="sousMenu" mnemonicParsing="false" text="File">
          <items>
            <MenuItem fx:id="menuQuit" mnemonicParsing="false" onAction="#onClick2" text="Quit" />
          </items>
        </Menu>
      </menus>
    </MenuBar>
    	<fx:include fx:id="p2" source="part2.fxml" />
 
  </children>
</VBox>

Et le fichier part2.fxml

Code:

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<?xml version="1.0" encoding="UTF-8"?>
 
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
 
 
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="controler.CenterControler">
   <children>
      <Button fx:id="btn_1" layoutX="274.0" layoutY="188.0" mnemonicParsing="false" onAction="#onClickShowMSG" text="Button" />
      <Label fx:id="labelMSG" layoutX="286.0" layoutY="128.0" text="Label" />
   </children>
</AnchorPane>

Merci d'avance pour votre aide. :mrgreen:

Code:

1 2 Caused by: java.lang.NullPointerException at controler.CenterControler.show(CenterControler.java:42)
Vérifie que ton instruction ne manipule pas un objet null, par exemple si tu as déclaré un id au lieu de un fx:id dans le FXML ou si tu as fait une faute de frappe dans le nom de la variable ou si tu as oublié @FXML dans le contrôleur.

Tout d'abords merci pour ta réponse, j'ai vérifié pour ce que tu m'as dit et ça fonctionne désormais :mrgreen:

Problème de nommage / orthographe comme prévu.

Dans themain.fxml tu as :

Code:

<fx:include fx:id="p2" source="part2.fxml" />

Mais dans MainControler tu as :
Code:

1 2 @FXML private CenterControler centreControle;
Donc, cette valeur est toujours null puisque le nom n'est pas correct.

Pour que l’injection se fasse de manière correcte tu devrais en fait avoir à la place :
Code:

1 2 @FXML private CenterControler p2Controller;
Tu dois ensuite modifier la méthode onClick2() pour qu'elle devienne :
Code:

1 2 3 4 @FXML protected void onClick2() { p2Controller.show("IT WORKS !!! FROM MAIN CONTROLER"); }
De plus, tu devrais enlever la méthode setCenterControle(), elle ne sert à rien puisque l'injection du contrôleur secondaire est implicite lors du chargement du 1er FXML.

PS : et controller ça prend 2 l en anglais.