Error reading the module..

**Universecloud9** · December 28th, 2021, 08:12 PM

early on i was watching videos on udemy and youtube for javafx but they all lead to creating a new project for each program.

I didn't like the fact that the code was pre-written for me so i went back to a book called "Introduction to java programming 10th edition" by Y. Daniel Liang.

Chapter 14 talks about the basics of creating the program but not on how to set it up.

Do i really need to create a new javafx and go through all that trouble setting up everything every time i want to create something ?

In the previous chapters it was as simple as, right click src > new > java class and thats it!

I'm completely oblivious to javafx but i understood more from reading a few lines in a book than listening to people talk.

What am i doing wrong ?[COLOR="Silver"]

**Norm** · December 28th, 2021, 09:15 PM

Please copy the text and paste it here that you have questions about. The posted images are very hard to read.

**Universecloud9** · December 28th, 2021, 09:16 PM

Originally Posted by Norm

Please copy the text and paste it here that you have questions about. The posted images are very hard to read.

Error occurred during initialization of boot layer
java.lang.module.FindException: Error reading module: C:\Users\r-\Desktop\HelloFX\target\classes
Caused by: java.lang.module.InvalidModuleDescriptorException: Package HelloApplication not found in module

Process finished with exit code 1

**Universecloud9** · December 29th, 2021, 07:35 PM

Its a serious question you know : probably stupid but please i need an answer.

**Norm** · December 29th, 2021, 07:51 PM

What command are you executing that returns that error message?

If it is from deep inside of an IDE I probably can not help you.

The people at this forum would be more help:
https://coderanch.com/f/98/JavaFX

**Universecloud9** · December 29th, 2021, 09:12 PM

package com.example.hellofx;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;

public class JavaProgramtest extends Application {

@Override // Override the start method in the Application class since the start class is an abstract class.

public void start(Stage primaryStage) {

//Create the scene and place a button in the scene

Scene scene = new Scene(new Button("OK"), 200, 250);

primaryStage.setTitle("Khello and velcome to javafx");
primaryStage.setScene(scene);
}

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

that code is placed after making a javafx class inside the hellofx folder. What i mean here is that after i created the first "hello world" for javafx, in that same file i created another java file when excuting the code above, i get the error message. Check the pictures, not the first one but the rest (called error1,2,3).

Error occurred during initialization of boot layer
java.lang.module.FindException: Error reading module: C:\Users\r-\Desktop\HelloFX\target\classes
Caused by: java.lang.module.InvalidModuleDescriptorException: JavaProgramtest.class found in top-level directory (unnamed package not allowed in module)

**Norm** · December 29th, 2021, 09:21 PM

in that same file i created another java file

Each java class should be in its own file. I'm not sure what "in that same file" means.

**Universecloud9** · December 29th, 2021, 10:08 PM

As i said, in the previous chapters, before javafx, creating a new java file was as easy as right clicking the java file > new > java class. from there making new code and running it has never been a problem. Why doesn't it work with javafx?

The new thing with javafx is that i have to open run/debug configurations among other things to get the thing working but can't i, after all that just create a new java class in that file without having to do all that ?

I suppose it isn't that big of a deal but i just want to know. A bit lazy but man, i like to ask alot of questions to clear things for the future.

That error i'm getting is basically telling me that the file is in the wrong section (sadly i can't upload a better picture since the max resolution on this site is like 620x280), do you know (from the image "error 2") where can i place the java class for it to work or that isn't possible at all ?

**Norm** · December 30th, 2021, 07:00 AM

where can i place the java class

What tools are you using to compile and execute the program?
Are you executing commands in a command prompt
or are you using an IDE to do it?

**Universecloud9** · December 30th, 2021, 02:24 PM

intelliJ

**Norm** · December 30th, 2021, 04:33 PM

Sorry, I do not know how to use that IDE. Is there a forum for that IDE where you can ask how to configure it for Java Modules?

**Universecloud9** · December 31st, 2021, 12:55 PM

Configuring it isn't the problem, i just don't like doing it over and over every time i want to make something simple .-.

I legit stopped programming because of it. I'll post it here if i ever find something.

**Norm** · December 31st, 2021, 01:36 PM

doing it over and over every time i want to make something simple .-.

If you don't type (or paste) in the code, how will any editor know what code to include to do what the program is desired to do.

I am able to compile and execute your javafx program by configuring the contents of the commandline to use.
The code is missing a call to the Stage class's show method.

**Universecloud9** · December 31st, 2021, 10:14 PM

Originally Posted by Norm

by configuring the contents of the commandline to use.
The code is missing a call to the Stage class's show method.

Could you please explain the process ? are you talking about stageObject.show() ? i tried that (inside the start method) and still getting the same error.

**Norm** · January 1st, 2022, 06:43 AM

The code needs the call to the show method to work.

The process for building the commandline was trial and error. I added modules to the commandline until it worked.
The commandline I used:

D:\Java\jdk-17\bin\java.exe -cp .;..\..\. --module-path "D:\Java\javafx-sdk-12.0.2\lib" --add-modules=javafx.controls --add-modules=javafx.fxml JavaProgramtest

**Universecloud9** · January 7th, 2022, 11:18 PM

Originally Posted by Norm

The code needs the call to the show method to work.

The process for building the commandline was trial and error. I added modules to the commandline until it worked.
The commandline I used:

D:\Java\jdk-17\bin\java.exe -cp .;..\..\. --module-path "D:\Java\javafx-sdk-12.0.2\lib" --add-modules=javafx.controls --add-modules=javafx.fxml JavaProgramtest

I am so confused O_O isn't a method part of a class?

Looking at the directory and it seems like you're dealing with the configuration files (those vm options) with adding modules but when i go to "Edit configurations" and select the program i make (other than the one created in the video tutorial which had the vm options), it doesn't contain "VM options".

Mind you I'm creating a new java class in the same folder as the HelloFX program (which would normally work if it wasn't a JavaFX thing which leads back to my main question as to whether its possible or not).

In case you're wondering, i also used selected JavaFX as a new class in the java folder to see if its any different but nope.

**Universecloud9** · January 11th, 2022, 04:24 PM

To those wondering :

https://coderanch.com/t/748638/java/...module#3477276

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