FXML Load exception

Question

Ho un problema che non posso assolutamente risolvere da solo perché ho appena iniziato a utilizzare JAVA FX. Ottengo una brutta javafx.fxml.LoadException:, ma ho fatto esattamente come una guida, ma non riesco a far funzionare la mia Main. Questo è l'eccezione dell'uscita:

apr 07, 2014 4:06:37 EM application.Main start 
ALLVARLIG: null 
javafx.fxml.LoadException: 
/C:/Users/Jakob/Dropbox/java_kurser/Project%20Timeline/bin/application/LoginGUI.fxml 

    at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source) 
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) 
    at javafx.fxml.FXMLLoader.load(Unknown Source) 
    at application.Main.start(Main.java:21) 
    at com.sun.javafx.application.LauncherImpl$8.run(Unknown Source) 
    at com.sun.javafx.application.PlatformImpl$7.run(Unknown Source) 
    at com.sun.javafx.application.PlatformImpl$6$1.run(Unknown Source) 
    at com.sun.javafx.application.PlatformImpl$6$1.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at com.sun.javafx.application.PlatformImpl$6.run(Unknown Source) 
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source) 
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) 
    at com.sun.glass.ui.win.WinApplication.access$300(Unknown Source) 
    at com.sun.glass.ui.win.WinApplication$4$1.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[2,6] 
Message: Bearbetningsinstruktionens målmatchning "[xX][mM][lL]" är inte tillåten. 
    at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(Unknown Source) 
    at javax.xml.stream.util.StreamReaderDelegate.next(Unknown Source) 
    ... 20 more 

LoginController.java

package application; 

import java.net.URL; 
import java.util.ResourceBundle; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler; 
import javafx.fxml.FXML; 
import javafx.fxml.Initializable; 
import javafx.scene.control.Button; 
import javafx.scene.control.PasswordField; 
import javafx.scene.control.TextField; 


public class LoginController implements Initializable { 

    @FXML // ResourceBundle that was given to the FXMLLoader 
    private ResourceBundle resources; 

    @FXML // URL location of the FXML file that was given to the FXMLLoader 
    private URL location; 

    @FXML // fx:id="loginButton" 
    private Button loginButton; // Value injected by FXMLLoader 

    @FXML // fx:id="newUserButton" 
    private Button newUserButton; // Value injected by FXMLLoader 

    @FXML // fx:id="passwordField" 
    private PasswordField passwordField; // Value injected by FXMLLoader 

    @FXML // fx:id="usernameField" 
    private TextField usernameField; // Value injected by FXMLLoader 

    public void initialize(URL location, ResourceBundle resources) { 

     assert loginButton != null : "fx:id=\"loginButton\" was not injected: check your FXML file 'LoginGUI.fxml'."; 
     assert newUserButton != null : "fx:id=\"newUserButton\" was not injected: check your FXML file 'LoginGUI.fxml'."; 
     assert passwordField != null : "fx:id=\"passwordField\" was not injected: check your FXML file 'LoginGUI.fxml'."; 
     assert usernameField != null : "fx:id=\"usernameField\" was not injected: check your FXML file 'LoginGUI.fxml'."; 


     //The button event for the login button 
     loginButton.setOnAction(new EventHandler<ActionEvent>() { 

      public void handle(ActionEvent e) { 
       System.out.println("This button works"); 
      } 
     }); 
     } 
    } 

LoginGUI.fxml

<?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.*?> 
<?scenebuilder-background-color 0x008effff?> 

<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="LoginController"> 
    <children> 
    <Button fx:id="loginButton" cancelButton="false" contentDisplay="CENTER" defaultButton="true" layoutX="254.0" layoutY="263.0" mnemonicParsing="false" opacity="1.0" prefHeight="28.0" prefWidth="92.0" text="Login" underline="false"> 
     <font> 
     <Font size="14.0" fx:id="x1" /> 
     </font> 
    </Button> 
    <PasswordField fx:id="passwordField" layoutX="241.0" layoutY="206.0" prefHeight="23.000099999997474" prefWidth="118.0" promptText="Password" /> 
    <TextField fx:id="usernameField" layoutX="241.0" layoutY="166.0" prefHeight="23.0" prefWidth="118.0" promptText="Username" /> 
    <Label layoutX="248.0" layoutY="98.0" prefHeight="35.000099999997474" prefWidth="105.0" text="Welcome"> 
     <font> 
     <Font size="22.0" /> 
     </font> 
    </Label> 
    <Button id="loginButton" fx:id="newUserButton" cancelButton="false" contentDisplay="CENTER" defaultButton="true" font="$x1" layoutX="254.0" layoutY="313.0" mnemonicParsing="false" opacity="1.0" prefHeight="28.0" prefWidth="92.0" text="New User" underline="false" /> 
    </children> 
</AnchorPane> 

e Main.java

package application; 

import java.util.logging.Level; 
import java.util.logging.Logger; 

import javafx.application.Application; 
import javafx.fxml.FXMLLoader; 
import javafx.scene.Scene; 
import javafx.scene.layout.AnchorPane; 
import javafx.stage.Stage; 

public class Main extends Application { 

    public static void main(String[] args) { 
     Application.launch(Main.class, (java.lang.String[])null); 
    } 

    @Override 
    public void start(Stage primaryStage) { 
     try { 
      AnchorPane root = (AnchorPane) FXMLLoader.load(Main.class.getResource("LoginGUI.fxml")); 
      Scene scene = new Scene(root); 
      primaryStage.setScene(scene); 
      primaryStage.setTitle("Bluerift Timeline"); 
      primaryStage.show(); 
     } catch (Exception ex) { 
      Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

} 

Answer 1

Il problema è in aspro ce

Quindi, hai avuto modo di cambiarlo in una vera e propria una

Così farlo, modificare il sorgente del file fxml qui

AnchorPane root = (AnchorPane) FXMLLoader.load(Main.class.getResource("LoginGUI.fxml")); 

con questo

AnchorPane root = (AnchorPane) FXMLLoader.load(Main.class.getResource("/packagename/LoginGUI.fxml")); 

Answer 2

Ho riscontrato anche questo problema. Ho scoperto che non ho aggiunto il nome del pacchetto al nome del controller indicato nel file FXML; Inizialmente ho appena aggiunto il nome della classe Controller. Ad esempio: se la mia classe controller è sotto il pacchetto com.stackoverflow.gui e il mio nome della classe controller è LoginController. Il file FXML dovrebbe avere com.stackoverflow.gui.LoginController e non solo LoginController