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I have problems loading my fxml files when starting my Project from jar (jar was generated with maven). Igore the System.outs theyre only for quick Debugging purposes.

I use the following code (this code is called from the class TabPaneTest):

FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("TabPaneView.fxml"));

This is the initialize Method of the corresponding Controller:

@FXML
public void initialize() 
 this.tabPane1.setTabClosingPolicy(TabClosingPolicy.ALL_TABS);
 this.loginTab.setClosable(false);
 this.loginTab.setText("Login");
 FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("../view/ConnectView.fxml"));
 //Funktionierende jar
 //FXMLLoader fxmlLoader = new FXMLLoader(new URL("rsrc:resources/de/statistik_nord/klr/view/EingabeView.fxml"));
 //System.out.println(getClass().getClassLoader().getResourceAsStream("resources/de/statistik_nord/klr/view/EingabeView.fxml"));

 fxmlLoader.setController(new ConnectController());
 Parent root = null;
 //Parent root = FXMLLoader.load(getClass().getResource("view/ConnectView.fxml"));
 try 
 root = (Parent) fxmlLoader.load(); //This is TabPaneController.java:52, which is mentioned in the stacktrace
 catch (IOException e) 
 // TODO Auto-generated catch block
 e.printStackTrace();
 
 this.loginTab.setContent(root);
 dbc.bind(((ConnectController) fxmlLoader.getController()).getDbcProperty());
 this.dbc.addListener(new ChangeListener<DBConnection>() 
 @Override
 public void changed(ObservableValue<? extends DBConnection> observable, DBConnection oldValue, DBConnection newValue) 
 // TODO Auto-generated method stub
 
 if(newValue != null) 
 System.out.println(dbc + "new");
 ec = new EingabeController(dbc.getValue());
 changeExistingTab(loginTab, "Eingabe", "../view/EingabeView.fxml", ec, (ActionEvent e) -> 

 
 if (e.getTarget() instanceof Button) 
 switch(((Button) e.getTarget()).getId()) 
 case "buttonUebersKTR":
 openNewTab(new Tab(), "Uebersicht Kostentraeger", "../view/Übersicht_KTRView.fxml", new Uebersicht_KTRController(dbc.getValue(), ec.getChosenPersonal()));
 break;
 case "buttonPersonalKTR":
 openNewTab(new Tab(), "Personalübersicht für: ", "../view/Personal_KTR_UebersView.fxml", new Personal_KTR_UebersController(dbc.getValue(), ec.getChosenKTR()));
 break;
 case "buttonUnvollstaendig":
 openNewTab(new Tab(), "Unvollstaendig", "../view/UnvollstaendigView.fxml", new UnvollstaendigController(dbc.getValue()));
 break;
 case "buttonLogOut":
 dbc.removeListener(this);
 tabPane1.getTabs().removeIf(tab -> !(tab.getText().equals("Eingabe")));
 initialize();
 System.out.println(dbc + "case");
 break;
 
 else 
 System.out.println("Event!!!!");
 

 

 );
 
 



 

 );

And the Directorys inside the jar look like this:

jar directories
jar directories 2

I get the following error:

Caused by javafx.fxml.LoadException: File:/....../[...].jar!/de/statistik_nord/klr/TabPaneView.fxml

I also print the path and get this (when exetung the jar):

System.out.println(getClass().getResource("TabPaneView.fxml"));
jar:file:/...../[...].jar!/de/statistik_nord_klr/TabPaneView.fxml

Starting the program from eclipse works just fine and has basically the same packaging:

eclipse directories

edit:

Stacktrace:

/* This is sys.out.print output I do myself 
TEEEEEEEEEEEEST
jar:file:/C:/Users/WollscPh/eclipse- workspace/klr_fx_test/target/klr_fx_test-0.0.1-SNAPSHOT.jar!/de/statistik_nord/klr/view/TabPaneView.fxml
TEEEEEEEEEEEEST
*/
Exception in Application start method
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 com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs (LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
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.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
at java.lang.Thread.run(Unknown Source)
Caused by: javafx.fxml.LoadException: 
file:/C:/Users/WollscPh/eclipse-workspace/klr_fx_test/target/klr_fx_test-0.0.1-SNAPSHOT.jar!/de/statistik_nord/klr/TabPaneView.fxml

at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2571)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at de.statistik_nord.klr.TabPaneTest.start(TabPaneTest.java:37)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
... 1 more
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)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2566)
... 12 more
Caused by: java.lang.IllegalStateException: Location is not set.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2434)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at de.statistik_nord.klr.controller.TabPaneController.initialize(TabPaneController.java:52)
... 22 more
Exception running application de.statistik_nord.klr.TabPaneTest

the fxml file (TabPaneView, loaded in TabPaneTest.java, the main class):

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

<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.layout.BorderPane?>

<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1">
<center>
</center>
<center>
 <TabPane fx:id="tabPane1" prefHeight="200.0" prefWidth="200.0" tabClosingPolicy="UNAVAILABLE" BorderPane.alignment="CENTER">
 <tabs>
 <Tab fx:id="loginTab" text="Untitled Tab 1" />
 </tabs>
 </TabPane>
</center>
</BorderPane>

The fxml file (ConnectView, which is the second loaded fxml and loaded from the initialize method of TabPaneController)

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

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.BorderPane?>

<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1">
<left>
 <TextField id="text1" fx:id="textField1" prefHeight="48.0" prefWidth="149.0" promptText="User" BorderPane.alignment="CENTER" />
</left>
<right>
 <TextField id="text2" fx:id="textField2" prefHeight="48.0" prefWidth="149.0" promptText="Passwort" BorderPane.alignment="CENTER" />
</right>
<center>
 <Button fx:id="button1" mnemonicParsing="false" text="LogIn" BorderPane.alignment="CENTER" />
</center>
</BorderPane>

Just in case Ill include the corresponding Controller for the ConnectView too, although theres not really anything Happening:

@FXML
public void initialize() 
 // TODO Auto-generated method stub
 button1.setOnAction(new EventHandler<ActionEvent>() 
 public void handle(ActionEvent event) 

 dbc.set(new DBConnection(textField1.getText(), textField2.getText()));
 
 );

The mistake was using .. in the relative path I used:

FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("../view/ConnectView.fxml"));

This exists in the normal filesystem, but not in the jar, which explains why it worked if I started it from eclipse but not when I started it from the executable jar.
The solution to this is the following:

FXMLLoader fxmlLoader = new FXMLLoader(getClass().getClassLoader().getResource("de/statistik_nord/klr/view/ConnectView.fxml"));

For reference the path to ConnectView.fxml is this:
MyJarName.jar/de/statistik_nord/klar/view/ConnectView.fxml.