Error Message: Error: JavaFX runtime components are missing, and are required to run this application
LOOK HERE: project structure photo
I have downloaded the javafx extentions for the project as well as the jar file and attached it, the program knows javafx is there since the code errors went away. However, it then said there were no docs and no it says there's no JavaFx runtime components. I have been hiting error after error trying to get javafx to just run a hello world program in eclipse.
JavaFX was removed from Java 11.
It's no longer shipped with the JDK, you need to install it separately (it's now a distinct product called OpenJFX).
JavaFX is no longer provided in the builds after Java 10; however commercial support for JavaFX in JDK 8 (LTS) will continue through at least 2022.
You can now use OpenJFX Project, which is the open source home of JavaFX development. It's sponsored by the Swing Group.
Related
I'm currently following this tutorial: https://openjfx.io/openjfx-docs/ (JavaFX and IntelliJ IDEA). I use Intellij 2021.3.2.
I have created a project (1. Create a JavaFX project), which worked out great and didn't need to 2. Set JDK 16 because it was already set to 17 (which I guess is fine).
But here begin the weird stuff (and I'm very new to programming so I'm sorry if it sounds silly). "You can also set the language level to 11 or greater." I don't have this option. Because it's "can" I felt like it wasn't a big deal but if someone can explain what this is all about? Just out of curiosity, because I'm at the very beginning of the tutorial and I kinda only understand half of it.
Then 3. Create a library, and I don't have what they have, and my stuff is red:
So when they said "add the JavaFX 17 SDK as a library to the project" I didn't know what to do. I also didn't know what to do to fix the red stuff.
And finally, they say "Warning: If you run now the project it will compile but you will get this error: ..." but if I click on this button
everything works! which you know i'm not complaining about but I would like to understand a bit more what is happening.
And then they suggest I should 4. Add VM options to fix the problem that I don't have. So I figured maybe my computer set the VM options correctly without me knowing it but there is currently no VM option (and it works). Should I add them nonetheless?
Thank you for your help, I'm very lost and feel like I don't really understand anything.
The current documentation in the openjfx tutorial for getting started with JavaFX using Idea is incorrect, at least for recent Idea releases (2021.3 +).
The tutorial is written as though a new Java project was created, rather than a new JavaFX project. Once a new JavaFX project has been created, most of the rest of the steps in the tutorial are either redundant or wrong.
Step 1, “Create a JavaFX project", does a lot more than just “Create a Java project”, which is why everything else is different from the tutorial.
A better tutorial for getting started with JavaFX with Idea, is the official Idea documentation:
Create a new JavaFX project.
Differences between creating a new Java project and creating a new JavaFX project
The new JavaFX project:
Provides a build script for Maven (pom.xml) or Gradle (build.gradle).
Adds the appropriate dependencies for JavaFX base, graphics, controls and fxml.
Provides an example application and controller code that you can run immediately.
The example project is modular and provides a module-info.java
Because the program is modular and dependencies are downloaded via maven and recognized by the IDE, you don’t need to manually configure VM runtime options for the module path and adding modules.
Idea will recognize the Maven or Gradle projects and automatically synchronize the initial transitive dependent libraries with the Idea project.
There are options in the Idea Maven tool window which will allow you to synchronize further changes to dependent libraries or javadoc and source code in libraries.
Selects a JDK and attaches it to the project, automatically downloading the selected JDK version if not already present.
Sets an appropriate language level for the project.
When you just use the create new Java Project option, it doesn’t do any of those things, so you need to do things manually instead, which is what the rest of that tutorial is about:
Manually download the JDK and configure it in the SDK.
Manually download the JavaFX SDK and add the libraries from it to your project.
Manually configure VM modular arguments.
Manually maintain any other dependencies.
Manually associate javadoc and source code.
Manually write the code for a basic application.
Manually set the project language level.
Doing all this stuff manually is more work and more error prone. The manual work usually leads to a worse outcome and a project that is more difficult to maintain for many people getting started with JavaFX, so I do not recommend it.
Versions
In terms of the versions to use, I recommend using the most recent stable (non-beta) releases of both JDK and JavaFX, regardless of what versions may be referenced in any tutorials you may be using.
You can set JavaFX versions in the Maven file generated by the new JavaFX project wizard, then press the button in the Maven Tool window to synchronize the Maven project with the Idea project.
Language level settings
These are important later on, but pretty irrelevant when just getting started.
The language level settings:
Tell the compiler what version of the java byte code to compile the application to.
Tell the IDE what language syntax rules to enforce and provide help with.
If you use Java 17 only features, the app won’t run on a Java 11 VM.
You can define the settings in Idea manually:
language setting level.
But it is better to set them in the compiler section of the maven project and synchronize the project with Idea, which will also configure the settings in the IDE.
IMO, set it to the most recent stable version and have a requirement that your application be run with that Java version as a minimum (you can enforce that by using jlink or jpackage to bundle the JRE version you choose with your packaged app).
I have been troubleshooting this error for the past few days - and have hit a brick wall. I am running NetBeans v11.3, and Ubuntu Bionic (v18.04.4).
I have installed Java versions 8 and 11 (openjdk) along with source code.
I have also installed javaFx versions 8 and 11 with source code.
I have even gone to "Tools -> Java Platform Manager" and ensured that v8 and v11 of Java are properly installed along with the appropriate "Platform Sources".
But I still get the error mentioned when I try to create a new JavaFX project.
Any help would be very much appreciated.NetBeans JavaFX project create error
I have never tried to use JavaFX on openJDK, try out with Oracle JDK, as far as I know this is the best choice for using JavaFX, also try to edit the default platforms to match the appropiate system paths
im developing a new java fx project and thought it is a good idea to start with java 10 and later migrate to java 11.
My problem is now that i cant get the javafx css support in eclipse to work.
With Java 8 it was a problem of adding JavaFX SDK to the buildpath after installing e(fx)clipse.
But with the new module system this doesnt seem to work when i add JavaFX SDk as an module or an normal library to the buildpath. I still get unknown property warnings in my css and the JavaFX SDK doesnt appear in my file tree.
Im out of ideas and hoping for some clues to get this to work in eclipse with java 10.
I'm wanting to use a few JavaFX components in a Swing app (notably JFXPanel for its HTML 5 rendering support). My app is currently set up in Eclipse 4.3 (Kepler) and I have the latest Java 7 JDK installed on my machine.
This tutorial from Oracle suggests that all you have to do is just refer to a JavaFX class and it'll work in a Swing app. So I type in JFXPanel panel = new JFXPanel(), but Eclipse does not recognize it as a valid Java class. It does recognize other Java 7 classes, like java.nio.
I can't figure out how to get Eclipse to recognize JavaFX classes. This question was previously answered about JavaFX in Eclipse. The first response said that you need to start by creating a new JavaFX project, which I can't do because I already have a fairly developed Swing app. The second is to use the e(fx)clipse plugin, but the tutorial also seems to require this. If there's something special I have to do in order to get a non-JavaFX project in Eclipse to use JavaFX classes, I can't figure out how to do it.
The problem with JavaFX is that it is not on the default classpath so eclipse won't find it (and your exported swing application won't either unless you use the oracle packaging utility!).
So you have 2 options:
a) you install e(fx)clipse and modify the projects Buildpath to include the JavaFX-SDK library.
b) you add the jfxrt.jar yourself to the projects Buildpath (you don't need anything else).
e(fx)clipse would give you extra support for FX development. The version that can be installed into Kepler can be found at http://download.eclipse.org/efxclipse/updates-nightly/site
I've started encountering some weird exceptions trying to use the GWT designer. I'm on Ubuntu if it matters, GWT 2.4.0, Java 1.6.0_20 x64
When I use the designer, a previously used DisclosurePanel shows up in a pink box indicating. When viewing the details, it indicates a NoClassDefFound error. This makes no sense because in the code editor, the class is visible and compiles without error.
Secondly, I am unable to drop a CellTable instance on the designer. Even with the most basic T = java.lang.Object, the error comes back indicating an IllegalArgumentException : "Unable to find 'columns' in class com.google.gwt.user.client.UI.HTML.
This was working yesterday with the designer, but all of a sudden has entered the crapper. I tried reinstalling the GWT plugins, and even using a new eclipse install with fresh GWT plugins installed, but to no avail. Does anyone know the source of these errors and how to remedy them?
Alright, it seems that the other day I synced up my build machine for the fisrt time and had a different version of java installed on my dev machine. OpenJDK 1.6.0_20 (Iced Tea 1.9), vs Java SE 1.6.0_35.
Since this java was in my /usr/bin which was earlier in my PATH envi var than my 1.6.0_35 build that was at the end of the PATH, it was using hte older 0_20 version. I'm guessing the GWT designer was built with something closer to 1.6.0_35 than 1.6.0_20, and was causing conflicts as implied here.:
Start by checking your Eclipse ".log" file (found in your /.metadata directory). If the error references one of your classes or methods, check that your classpath properly references the class you are trying to use. Also check that your class is properly compiled (no red X's) and that a .class file exists in your projects /bin directory. A mismatch between the JDK used to compile your code and the JVM used to run Eclipse can also manifest itself as a NoClassDefFoundError problem. For example, if you compile your code using JDK 1.5 or 1.6 and then run your Eclipse using a 1.4 or 1.5 JVM, you can have this problem. If the error refers to a custom widget, you should also check that your component does not trigger an exception during its initialization (which can manifest itself as a NoClassDefFoundError). Try refreshing and cleaning your project using the Project > Clean... or Project > Build Project commands. If that does not help, send a test case to support.