I've been banging my head on this one for ages and all of the tutorials I've found don't seem to work. When I try to create a new JavaFX project in Netbeans 14, using JDK 18 and the latest JFX download for Windows here:
https://gluonhq.com/products/javafx/
Also tried with JDK and JFX 17 and still no luck. I get this error:
I've added the libraries like so:
If I try to add the platform folder, it won't let me progress through the dialogue:
I can't find solutions to this anywhere and, again this is the same with JDK 17 and 18, and JFX 17 and 18. I've checked the documentation and there's nothing that seems to solve the issue.
It says to go to the JavaFX tab and enable JavaFX, but there's no JavaFX tab... Unless they mean this:
But if that's it then, as you can see, it's already enabled and it's still not working. I'm totally lost. I don't understand why the documentation is so poor for FX, for every IDE. It's honestly like they don't want people to use it and every tutorial I'm finding is using outdated versions of NetBeans, the JDK and JFX D-: (they also don't solve the issue even if I do follow them).
If anyone could help guide me, I'd really appreciate it.
I would suggest you go to New Project -> Java with Maven -> either Simple JavaFX Maven Archetype(Gluon) or FXML JavaFX Maven Archetype(Gluon). Use the POM to change your version of JavaFX from the default to whatever version you like. I also use the POM to change the JavaFX-Maven-Plugin to the latest version.
I strongly endorse the approach using maven suggested here. This project started exactly the same way; I'd welcome learning of any issues you encounter.
Alternatively, follow the steps outlined in JavaFX and NetBeans: Non-modular projects: IDE. You've created a JavaFX library, but "Don't try to create a JavaFX project." Instead, choose Java with Ant and Java Application to create a new project, shown below, then follow the remaining steps carefully. It's a convenient alternative for a scratch project while you assay maven.
Addendum: The ant code for a JavaFX project, not selected in the image above, may attempt to package dependencies that are no longer required. In particular, a project using module javafx.web may fail with the following error, seen here and here. The easiest fix is to recreate the Java application by choosing Java Project with Existing Sources.
Unable to create javax script engine for javascript.
Alternatively, a simple example using a custom ant script is cited here.
I tried to install and setup JavaFX according to the videos on youtube but I, unfortunately, cannot setup JavaFX :( tried many solutions on the internet, but still doesnt work. There are 2 things which are different on my eclipse.
First is Java build path -> Libraries. My Libraries are not separated as classpath or modulepath.
Second, when I create JavaFX project, "module-info.java" is being created automatically. I haven't seen this file on any of the videos.
Could any of these be the reason why I get this error? Please help me..
You are using Java 1.8. The Modulepath or the Classpath won't show up if you are using that version. It should show up if you use Java version 11.
I was having issues with the module-info file autopopulating as well. However, once you get the JavaFX library you create under the Modulepath, the error should disappear.
I'm working on a project in Eclipse where I use the JavaSE-14 Modulepath and JavaSDK Classpath. However, every time I try to import a class from JavaFX it says the import javafx cannot be resolved. Any help? I'm new to programming in Java so please elaborate your answer.
JavaFX is now a separate bundle to JDK so if you wish to use JDK14 with Eclipse then download a compatible JavaFX SDK. JavaFX 15.0.1 requires JDK 11 or later.
Then set up your project build path - right mouse on project: Build Path > Configure Build Path.
In Libraries tab it is easier to define a variable: Add Variable JAVAFXLIB and pick the lib dir of your JavaFX release - example: set JAVAFXLIB to C:/java/javafx-sdk-15/lib.
Then use the variable in the Module Path or Class Path of your project - example JAVAFXLIB/javafx.base.jar.
If you plan to release your application you may want to get hold of the JavaFX jmods release as well. Then you can use jlink to package Java runtime with your JavaFX dependencies as one unit - this will simplify your runtime-environment.
I'm having trouble getting IntellJ to recognize JavaFX packages. With a new JavaFX project, with OpenJDK 11, when trying to build the project, IntelliJ can't recognize the JavaFX packages.
I've imported openjfx:javafx-base-11 from the Maven repo.
I've looked at other questions and the solutions seem to range from checking that the bytecode is at the right level (mine is), and that the project language is correct (mine is).
Anyone have any ideas?
Edit:
Error:
As mentioned in the comments, the Starting Guide is the place to start with Java 11 and JavaFX 11.
The key to work as you did before Java 11 is to understand that:
JavaFX 11 is not part of the JDK anymore
You can get it in different flavors, either as an SDK or as
regular dependencies (maven/gradle).
You will need to include it to the module path of your project, even if your project is not modular.
JavaFX project
If you create a regular JavaFX default project in IntelliJ (without Maven or Gradle) I'd suggest you download the SDK from here. Note that there are jmods as well, but for a non modular project the SDK is preferred.
These are the easy steps to run the default project:
Create a JavaFX project
Set JDK 11 (point to your local Java 11 version)
Add the JavaFX 11 SDK as a library. The URL could be something like /Users/<user>/Downloads/javafx-sdk-11/lib/. Once you do this you will notice that the JavaFX classes are now recognized in the editor.
Before you run the default project, you just need to add these to the VM options:
--module-path /Users/<user>/Downloads/javafx-sdk-11/lib --add-modules=javafx.controls,javafx.fxml
Run
Maven
If you use Maven to build your project, follow these steps:
Create a Maven project with JavaFX archetype
Set JDK 11 (point to your local Java 11 version)
Add the JavaFX 11 dependencies.
<dependencies>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>11</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>11</version>
</dependency>
</dependencies>
Once you do this you will notice that the JavaFX classes are now recognized in the editor.
You will notice that Maven manages the required dependencies for you: it will add javafx.base and javafx.graphics for javafx.controls, but most important, it will add the required classifier based on your platform. In my case, Mac.
This is why your jars org.openjfx:javafx-controls:11 are empty, because there are three possible classifiers (windows, linux and mac platforms), that contain all the classes and the native implementation.
In case you still want to go to your .m2 repo and take the dependencies from there manually, make sure you pick the right one (for instance .m2/repository/org/openjfx/javafx-controls/11/javafx-controls-11-mac.jar)
Replace default maven plugins with those from here.
Run mvn compile javafx:run, and it should work.
Similar works as well for Gradle projects, as explained in detail here.
EDIT
The mentioned Getting Started guide contains updated documentation and sample projects for IntelliJ:
JavaFX 11 without Maven/Gradle, see non-modular sample or modular sample projects.
JavaFX 11 with Maven, see non-modular sample or modular sample projects.
JavaFX 11 with Gradle, see non-modular sample or modular sample projects.
The issue that JavaFX is no longer part of JDK 11.
The following solution works using IntelliJ (haven't tried it with NetBeans):
Add JavaFX Global Library as a dependency:
Settings -> Project Structure -> Module. In module go to the
Dependencies tab, and click the add "+" sign -> Library -> Java->
choose JavaFX from the list and click Add Selected, then Apply settings.
Right click source file (src) in your JavaFX project, and create a new
module-info.java file. Inside the file write the following code :
module YourProjectName {
requires javafx.fxml;
requires javafx.controls;
requires javafx.graphics;
opens sample;
}
These 2 steps will solve all your issues with JavaFX, I assure you.
Reference : There's a You Tube tutorial made by The Learn Programming channel, will explain all the details above in just 5 minutes. I also recommend watching it to solve your problem:
https://www.youtube.com/watch?v=WtOgoomDewo
Update Dec 14, 2020
Intellij has created a new JavaFX project wizard for Idea.
I highly recommend that, if you have an issue getting a JavaFX project to work, then use the new JavaFX project wizard to:
Create a new project using the wizard.
Test that the new project works.
Copy relevant code from your old project into the new project.
The new project wizard is pretty fool-proof and very easy to use to get a working JavaFX project up and running in less than a minute.
The wizard generated project has the following features:
Simple working sample code for a small application.
Makes use of JavaFX graphics, controls, fxml.
Configures a maven or gradle project to use JavaFX, with appropriate maven artifact dependencies for basic development.
Uses recent, reasonably up-to-date JavaFX modules, with consistent versions (which is something many beginners often don't do).
Adds a module-info.java file that works for an FXML based JavaFX application (will also work if you don't use FXML).
Demonstrates placing an FXML file in a resource directory, and looking it up as a resource at runtime (which is something many, many beginners get wrong).
Properly separates a Controller class from the Application class (which is also something many beginners get wrong).
Demonstrates the proper use of #FXML injection based on ids in an FXML file (which is also something many beginners get wrong).
Does not require the openjfx JavaFX SDK download (because JavaFX module dependencies are sourced through maven).
Does not require manually setting VM arguments to run the application (because the appropriate module statements are in the module-info.java file rather than a VM command line).
Allows execution and debugging of the JavaFX application directly from the IDE.
Includes the openjfx maven plugin.
You can probably ignore this or delete it from the generated project file if you want.
A couple of thoughts on the openjfx-maven plugin:
For most development, I don't think you need to use it.
If you don't need it you can remove it from your project.
The openjfx maven plugin is not required for the execution of the application
Although you could use it for that if you really wanted to, it doesn't provide any advantage over direct execution in the IDE as far as I can tell.
The openjfx maven plugin can be useful for building jlink based distribution if that is something you wish to do.
The openjfx maven plugin cannot package your application using jpackage, at least at the moment:
if that is something you wish to do, investigate JPackageScriptFX, the ackman maven jpackage plugin or the badass jlink or runtime plugins, or some alternative tool like invoking jpackage directly.
Prior Answer
Some of the info in this prior answer is still useful for understanding background information on Java platform modularity and JavaFX.
Quick summary, you can do either:
Include the JavaFX modules via --module-path and --add-modules like in José's answer.
OR
Once you have JavaFX libraries added to your project (either manually or via maven/gradle import), add the module-info.java file similar to the one specified in this answer. (Note that this solution makes your app modular, so if you use other libraries, you will also need to add statements to require their modules inside the module-info.java file).
This answer is a supplement to Jose's answer.
The situation is this:
You are using a recent Java version, e.g. 13.
You have a JavaFX application as a Maven project.
In your Maven project you have the JavaFX plugin configured and JavaFX dependencies setup as per Jose's answer.
You go to the source code of your main class which extends Application, you right-click on it and try to run it.
You get an IllegalAccessError involving an "unnamed module" when trying to launch the app.
Excerpt for a stack trace generating an IllegalAccessError when trying to run a JavaFX app from Intellij Idea:
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.IllegalAccessError: class com.sun.javafx.fxml.FXMLLoaderHelper (in unnamed module #0x45069d0e) cannot access class com.sun.javafx.util.Utils (in module javafx.graphics) because module javafx.graphics does not export com.sun.javafx.util to unnamed module #0x45069d0e
at com.sun.javafx.fxml.FXMLLoaderHelper.<clinit>(FXMLLoaderHelper.java:38)
at javafx.fxml.FXMLLoader.<clinit>(FXMLLoader.java:2056)
at org.jewelsea.demo.javafx.springboot.Main.start(Main.java:13)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
Exception running application org.jewelsea.demo.javafx.springboot.Main
OK, now you are kind of stuck and have no clue what is going on.
What has actually happened is this:
Maven has successfully downloaded the JavaFX dependencies for your application, so you don't need to separately download the dependencies or install a JavaFX SDK or module distribution or anything like that.
Idea has successfully imported the modules as dependencies to your project, so everything compiles OK and all of the code completion and everything works fine.
So it seems everything should be OK. BUT, when you run your application, the code in the JavaFX modules is failing when trying to use reflection to instantiate instances of your application class (when you invoke launch) and your FXML controller classes (when you load FXML). Without some help, this use of reflection can fail in some cases, generating the obscure IllegalAccessError. This is due to a Java module system security feature that does not allow code from other modules to use reflection on your classes unless you explicitly allow it (and the JavaFX application launcher and FXMLLoader both require reflection in their current implementation in order for them to function correctly).
This is where some of the other answers to this question, which reference module-info.java, come into the picture.
So let's take a crash course in Java modules:
https://www.baeldung.com/java-9-modularity
The key part is this:
4.9. Opens
If we need to allow reflection of private types, but we don't want all
of our code exposed, we can use the opens directive to expose specific
packages.
But remember, this will open the package up to the entire world, so
make sure that is what you want:
module my.module { opens com.my.package; }
So, perhaps you don't want to open your package to the entire world, then you can do:
4.10. Opens … To
Okay, so reflection is great sometimes, but we still want as much security as we can get from encapsulation. We can selectively open our packages to a pre-approved list of modules, in this case, using the opens…to the directive:
module my.module {
opens com.my.package to moduleOne, moduleTwo, etc.;
}
So, you end up creating a src/main/java/module-info.java class which looks like this:
module org.jewelsea.demo.javafx.springboot {
requires javafx.fxml;
requires javafx.controls;
requires javafx.graphics;
opens org.jewelsea.demo.javafx.springboot to javafx.graphics,javafx.fxml;
}
Where org.jewelsea.demo.javafx.springboot is the name of the package which contains the JavaFX Application class and JavaFX Controller classes (replace this with the appropriate package name for your application). This tells the Java runtime that it is OK for classes in the javafx.graphics and javafx.fxml to invoke reflection on the classes in your org.jewelsea.demo.javafx.springboot package. Once this is done, and the application is compiled and re-run things will work fine and the IllegalAccessError generated by JavaFX's use of reflection will no longer occur.
But what if you don't want to create a module-info.java file
If instead of using the Run button in the top toolbar of IDE to run your application class directly, you instead:
Went to the Maven window on the side of the IDE.
Chose the JavaFX maven plugin target javafx.run.
Right-clicked on that and chose either Run Maven Build or Debug....
Then the app will run without the module-info.java file. I guess this is because the maven plugin is smart enough to dynamically include some kind of settings that allows the app to be reflected on by the JavaFX classes even without a module-info.java file, though I don't know how this is accomplished.
To get that setting transferred to the Run button in the top toolbar, right-click on the javafx.run Maven target and choose the option to Create Run/Debug Configuration for the target. Then you can just choose Run from the top toolbar to execute the Maven target.
None of the above worked for me. I spent too much time clearing other errors that came up. I found this to be the easiest and the best way.
This works for getting JavaFx on Jdk 11, 12 & on OpenJdk12 too!
The Video shows you the JavaFx Sdk download
How to set it as a Global Library
Set the module-info.java (i prefer the bottom one)
module thisIsTheNameOfYourProject {
requires javafx.fxml;
requires javafx.controls;
requires javafx.graphics;
opens sample;
}
The entire thing took me only 5mins !!!
It is 2021 and JetBrains updated their IDE. The other questions about this error message are closed and point here.
Error: JavaFX runtime components are missing, and are required to run this application
If you have followed all of the other steps in these answers (eg. Libraries, --module-path, --add-modules, version matching JDK and JavaFX), and you still see this compile error, make sure your run/compile configuration has --module-path and --add-modules as VM Options and not Program Arguments in IntelliJ.
Open Run/Debug Configurations
Open Modify Options dropdown
Click Add VM Options
A very good explanation can be found at
https://edencoding.com/runtime-components-error/
including
Giving reflective access to your module
Giving other access to your module
and total, we need, adding to the above answers, add exports to your module definition
module my.project {
requires javafx.fxml;
requires javafx.controls;
opens my.project to javafx.graphics;
exports my.project;
}
add in VM options, (In run configuration), this line:
--module-path yourpathwheresdkislocated/lib --add-modules=javafx.controls,javafx.fxml
and if you want to run your jar application from terminal, put this
java --module-path yourpathwheresdkislocated/lib --add-modules=javafx.controls,javafx.fxml -jar YourJar.jar
Me and a few other students are building a game with Java at university. Someone else setup the basic structure for the project and i pulled the repo and tried to run it.
When i run it i get
this window
When i open the config, i am unable to add the main class, it is located in the file shown in the image. The OK button is disabled. You can see that here.
I'm running the latest version of IntelliJ, JDK 9 and Windows 10. The project in question is built with LibGDX. The full repo and folder structure can be seen here.
I am able to setup my own project and run my own apps, i just can't run this specific project.
Please help.
I think, since you have no "Java" directory, Intellij does not recognize any folder as Java Sources. You'll have to do that manually by rightclicking and mark the desired directory as Source root.
I figured out what the problem was, and of course - it was obvious. The project was setup with an old version of Gradle (2.4) and i was running Java 9. I installed Java 8 and made the project run.
The OK button was disabled because the project hadn't built properly (i though it had) so it couldn't find the class i needed to run it.