LoadException

Question

So I have watched this video many times, and run countless Google searches but I cannot figure out what the problem is.

Main.java

package sample;

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

public class Main extends Application{ @Override public void start(Stage primaryStage) throws Exception{ Parent root = FXMLLoader.load(getClass().getResource("sample.fxml")); primaryStage.setTitle("Sup"); primaryStage.setScene(new Scene(root,300,275)); primaryStage.show(); }

public static void main(String[] args){
    launch(args);
}

}

sample.fxml

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

<?import javafx.geometry.Insets?> <?import javafx.scene.layout.GridPane?>

<?import javafx.scene.control.Button?> <?import javafx.scene.control.Label?> <?import javafx.scene.control.Text?> <?import javafx.scene.control.TextField?>

<Text text="Sup" 
    GridPane.rowIndex="0"
    GridPane.columnSpan="2"
    GridPane.halignment="CENTER"></Text>

<!--<Label text="First Name:"
    GridPane.rowIndex="1"
    GridPane.columnIndex="0"></Label>

<TextField
    GridPane.columnIndex="1"
    GridPane.rowIndex="1"></TextField>

<Button text="Say Sup!"
    onAction="#handleSaySup"
    GridPane.rowIndex="2"
    GridPane.columnIndex="1"
    GridPane.halignment="RIGHT"></Button> -->

</GridPane>

And the Error:

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$155(LauncherImpl.java:182) at java.lang.Thread.run(Unknown Source) Caused by: javafx.fxml.LoadException: /C:/Users/1126386/workspace/FirstJavaFX/bin/sample/sample.fxml

at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2848)
at javafx.fxml.FXMLLoader.processImport(FXMLLoader.java:2692)
at javafx.fxml.FXMLLoader.processProcessingInstruction(FXMLLoader.java:2661)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2517)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at sample.Main.start(Main.java:13)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
... 1 more

Caused by: java.lang.ClassNotFoundException: javafx.scene.control.Text at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at javafx.fxml.FXMLLoader.loadTypeForPackage(FXMLLoader.java:2916) at javafx.fxml.FXMLLoader.loadType(FXMLLoader.java:2905) at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2846) ... 15 more Exception running application sample.Main

Answer 1 · 2017-05-17T17:51:54Z

May 17, 2017 5:51pm

Main.java

package sample;

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

public class Main extends Application{
    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("../sample/sample.fxml"));
        primaryStage.setTitle("Sup");
        primaryStage.setScene(new Scene(root,300,275));
        primaryStage.show();
    }

    public static void main(String[] args){
        launch(args);
    }
}

sample.fxml

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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.GridPane?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Text?>
<?import javafx.scene.control.TextField?>

<GridPane fx:controller="sample.Controller"
    xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">

    <Text text="Sup" 
        GridPane.rowIndex="0"
        GridPane.columnSpan="2"
        GridPane.halignment="CENTER"></Text>

    <!--<Label text="First Name:"
        GridPane.rowIndex="1"
        GridPane.columnIndex="0"></Label>

    <TextField
        GridPane.columnIndex="1"
        GridPane.rowIndex="1"></TextField>

    <Button text="Say Sup!"
        onAction="#handleSaySup"
        GridPane.rowIndex="2"
        GridPane.columnIndex="1"
        GridPane.halignment="RIGHT"></Button> -->

</GridPane>

Error Message

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$155(LauncherImpl.java:182)
    at java.lang.Thread.run(Unknown Source)
Caused by: javafx.fxml.LoadException: 
/C:/Users/1126386/workspace/FirstJavaFX/bin/sample/sample.fxml

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
    at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2848)
    at javafx.fxml.FXMLLoader.processImport(FXMLLoader.java:2692)
    at javafx.fxml.FXMLLoader.processProcessingInstruction(FXMLLoader.java:2661)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2517)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
    at sample.Main.start(Main.java:13)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    ... 1 more
Caused by: java.lang.ClassNotFoundException: javafx.scene.control.Text
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at javafx.fxml.FXMLLoader.loadTypeForPackage(FXMLLoader.java:2916)
    at javafx.fxml.FXMLLoader.loadType(FXMLLoader.java:2905)
    at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2846)
    ... 15 more
Exception running application sample.Main

Answer 2 · 2017-05-17T18:02:34Z

May 17, 2017 6:02pm

src ->sample ->->Main.java ->->sample.fxml

I've tried the code getResource("../sample/sample.fxml")); and getResource("sample.fxml")); both with no luck

Answer 3 · 2017-05-17T18:26:55Z

May 17, 2017 6:26pm

I moved the folder, no luck

Answer 4 · 2017-05-17T18:41:36Z

May 17, 2017 6:41pm

I'm not seeing how to mark it as a resource folder. How do you mark it?

Answer 5 · 2017-05-17T18:52:57Z

May 17, 2017 6:52pm

i just review your code and compare it to the code in the video Why did you comment this line?

 <!--<Label text="First Name:"
        GridPane.rowIndex="1"
        GridPane.columnIndex="0"></Label>

    <TextField
        GridPane.columnIndex="1"
        GridPane.rowIndex="1"></TextField>

    <Button text="Say Sup!"
        onAction="#handleSaySup"
        GridPane.rowIndex="2"
        GridPane.columnIndex="1"
        GridPane.halignment="RIGHT"></Button> -->

remove those  and keep your sample.fxml back dont forget to set this line also as

 getResource("sample.fxml"));

so copy and paste this in ur

sample.fxml

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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.GridPane?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Text?>
<?import javafx.scene.control.TextField?>

<GridPane fx:controller="sample.Controller"
    xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">

    <Text text="Sup" 
        GridPane.rowIndex="0"
        GridPane.columnSpan="2"
        GridPane.halignment="CENTER"></Text>

    <Label text="First Name:"
        GridPane.rowIndex="1"
        GridPane.columnIndex="0"></Label>

    <TextField
        GridPane.columnIndex="1"
        GridPane.rowIndex="1"></TextField>

    <Button text="Say Sup!"
        onAction="#handleSaySup"
        GridPane.rowIndex="2"
        GridPane.columnIndex="1"
        GridPane.halignment="RIGHT"></Button>

</GridPane>

Answer 6 · 2017-05-17T21:07:04Z

May 17, 2017 9:07pm

So I created a resources folder, moved the sample.fxml file into that folder.

In the parentheses for getResource, I have tried the following:

"resources/sample.fxml"
"/resources/sample.fxml"
"../resources/sample.fxml"
"/sample.fxml"
"sample.fxml"

None of these work. I am working with Eclipse. Folder structure:

FirstJavaFX

src
- sample
  - Controller.java
  - Main.java
- resources
  - sample.fxml

No other major changes to the code I posted earlier

Answer 7 · 2017-05-18T14:31:02Z

May 18, 2017 2:31pm

Yeah, I'm thinking that's the path I'm going to have to take. Thanks for your help

Answer 8 · 2018-01-10T16:29:41Z

January 10, 2018 4:29pm

Actually I got the same error with Netbeans, switched to IntelliJ and I still get the same error.

Answer 9 · 2018-03-12T21:36:44Z

March 12, 2018 9:36pm

Don't know if this will help, but my problem was not including

package sample;

on my Controller.java. It needs to be on both main.java and controller.java but not in sample.fxml

again, hopefully this solved your issue, I was about to lose my mind!

Edit: I encountered more errors, I was able to clear them up by declaring a "Resources" folder as an actual resource by going into File -> Project Structure -> Modules -> Resources folder, right click and select "Resources"

Answer 10 · 2021-01-02T10:15:49Z

January 2, 2021 10:15am

The problem is it's trying to load the file fxml file from compiled files at runtime. eg. Intellij generates target directory with compiled classes and the file is often copied to an incorrect location.

https://mkyong.com/java/java-read-a-file-from-resources-folder/

workaround. I pul my non-source-files into resources in IntellijProject.

1) load the URL with utility method

URL fxmlURL = FileResourcesUtils.getUrlOfFileFromeResource("sample.fxml");

2) pass it to the FXMLLoader.load(URL)

Parent root = FXMLLoader.load(fxmlURL);

code for getting the URL

public class FileResourcesUtils { public static URL getUrlOfFileFromeResource(String fileName) throws URISyntaxException {

    ClassLoader classLoader = FileResourcesUtils.class.getClassLoader();
    URL resource = classLoader.getResource(fileName);
    if(resource == null) {
        throw new IllegalArgumentException("file not found!" + fileName);
    } else {
        return resource;
    }
}

}

Answer 11 · 2021-08-24T19:10:55Z

August 24, 2021 7:10pm

If you get a NullPointerException while following this video, it means that intelliJ is having trouble finding your file.

In the video example, it shows the sample.fxml file in the root of the folder structure. But intelliJ is was looking in the resources.<folder_structure>.sample.fxml in my case.

Try moving your sample.fxml file and re-running the program to see if it resolves the NullPointerExpection.

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