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OpenJFX / JavaFX 16 WebView cannot display a simple webpage using WebGL

I've just tried to run a rudimentary example using OpenJFX 16 that is intended to open a webpage of a WebGL demo showing some blobs:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(final String[] args) {
launch(args);
}
#Override
public void start(final Stage primaryStage) {
primaryStage.setTitle("JavaFX WebView Example");
WebView webView = new WebView();
webView.getEngine().load("https://webglsamples.org/blob/blob.html");
VBox vBox = new VBox(webView);
Scene scene = new Scene(vBox, 960, 600);
primaryStage.setScene(scene);
primaryStage.show();
}
}
However, I get the following error message:
This page requires a browser that supports WebGL. Click here to
upgrade your browser.
I use Adoptium OpenJDK 16 under Mageia Linux. Is it the expected behaviour? I'm disappointed because a member of Gluon's support team told me:
there are some WebGL demos that run just fine in the WebView component
What can I do to solve this problem? Is it expected to work only with OpenJFX 17?
Edit.: Someone else tried with OpenJFX 18, it still doesn't work:
https://jvm-gaming.org/t/openjfx-javafx-webview-not-working-with-webgl/70495/2

JavaFXs WebView does not support WebGL and I am not aware of any plans to change that. Who told you that there are working demos for that and where can they be found? There have only been some experiments to resolve this issue but no official solution yet. E.g., https://github.com/miho/NativeFX

Why JavaFX application and scene builder is showing garbled text?

Here's how my scene builder looks like:
and here's the GUI:
The standalone scene builder:
I just run the following source code from Java SDK demos:
package sample;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
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"));
Button btn = new Button();
btn.setText("Say 'Hello World'!");
StackPane root_ctn = new StackPane();
root_ctn.getChildren().add(btn);
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent actionEvent) {
System.out.println("Hello World!");
}
});
primaryStage.setTitle("Hello World");
primaryStage.setScene(new Scene(root_ctn, 300, 275));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
The only place the text looks good is in the console.
View idea.log

I did not yet find out the solution, but I found an interesting pattern:
On your Gluon Scene Builder screenshot, there is written Pgy Rtqlgev, where it should be New Project, and Qrgp Rtqlgev where it should be Open Project. Note that every letter is substituted by the after next letter in the alphabet!
The same applies to Say 'Hello World'!, which is "translated" to Lc{ 'Jgrrq Yqtrf'!. Note that the letter y is replaced by a {, which comes two positions after y in the ASCII table. Interestingly, the characters ' and ! stay the same..
The space each letter takes is still the space of the correct letter, as you can see in the following graphic with the correct text on the green background:
Update:
Is it possible that the font "Segoe UI" is missing or flawed on your system? Can you use that font for example in Word?
Update: I found two other questions of users facing the same problem. In both cases the problem seems to be related to the Segoe UI font:
Scene Builder Editor displaying weird characters
JavaFX Scene builder shows wired characters

I have also encountered this problem and after reading many forums I think I have a possible explanation and solution. The problem seems to be related to Mac users and Segoe UI;
I am guessing that because the font is used in Microsoft products, Macs are unable to render the font, even downloaded versions have not worked.
The simplest fix, which has worked for me so far, is to include
style="-fx-font-family: serif"
in the root node or add it in the controller or add
.root{
-fx-font-family: serif
}
to your CSS. This works for any font in your system.

Installing Segoe UI was a huge red herring for me. Instead, I changed the version of javafx defined in build.gradle to 17.0.1 and upgraded JavaFX to 16

InteliJ JavaFX displaying blank white screen when booting

I'm trying to get a starter project for a template running over for JavaFX, the assignment is to get a hello world program up and running using JavaFX to get the program running.
(Some Background context: We're using IntelliJ for our class assignment, but recently we found out that it seems(?) support for JavaFx has been discontinued within InteliJ, regardless the same assignment remains so we installed a third party library following the steps over from a guide about getting the library, ( How to get JavaFX and Java 11 working in IntelliJ IDEA ), the instructions helped to get the program running and compiled and I used the paths out, but when I ran the program, I got a blank white screen, and I have no clue if this is normal or not.)
The code is just the default JavaFX template from Intllij, I've tried installing the SDKS and JDKS (which seemed to help the program compile), but when running, I just get a blank white screen.
Here is a screenshot of the white screen problem https://i.imgur.com/7ZYju3M.jpg
And the code below; it's just a IntelliJ default startup, but I don't know why it doesn't work.
package sample;
// Original Imports found in testTemplate
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("Hello World");
primaryStage.setScene(new Scene(root, 300, 275));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
package sample;
public class Controller {
}
We expected the results to say hello world. I think so anyways, but I actually have no clue what it's supposed to look like as it's my first time, I think it's supposed to say hello world. (Later on, we're supposed to get the GUI configured, but for right now, I just want to figure out what's going wrong with the program.)

java component not visible in windows 8 and 10 or its variant due to corrupted graphics driver

I tested my application based on java(javafx) in various version of windows(7,8,10) and it worked perfectly but when i tried to run it my client machine(Windows-10 Home(freshly installed)), it is getting run but the internal component of it is not visible, only thing what i can see is border, minimize,maximize and close button.
For the sake of convenience, attached here
are the results of simple java program or output which I got in my machine and client's machine respectively:
However when i made the same version of jar using Swing...it worked.
Note: Required version of JRE is there in system.
Follwing is the source code:::
the code is simple:::
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package hello;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
/**
*
* #author oa
*/
public class Hello extends Application {
#Override
public void start(Stage primaryStage) {
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("Hello World!");
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
Note: I can smell the conflicts between javafx and windows-10 version

Finally got a solution, after an hour of work out... As javafx rely on the graphic card installed on the system..
For JavaFX applications to take advantage of the new hardware acceleration pipeline provided by JavaFX, your system must feature one of a wide range of GPUs currently available in the market. If your system does not support hardware acceleration, then JavaFX uses the Java2D software pipeline.
so one has to ensure that its working properly. In any case if its corrupted or not working properly then javafx doesnt give you the desired result. So in any case if you found that your graphics card is not working properly then just disable it(graphics card)... the javafx will give the desired result thereafter. So basically it was not an WINDOWS 10 and javafx problem...it was graphic related issues

Eclipse not running JavaFX application - runs 'java' application

Whenever I create a project in Eclipse and include javafx, the application does not load when I click the run button.
e.g.
package test;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class test extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Hello World!");
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("Hello World!");
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
primaryStage.setScene(new Scene(root, 300, 250));
primaryStage.show();
}
}
This should run a simple hello world application, taken from the oracle documentation. However when I 'run' this code, no windows open. Instead an application called 'java' opens. It appears 'java' is simply a 'unix executable file' located in 'jdk1.8.0_25.jdk/contents/home/bin'. The application 'java' displays absolutely nothing, and cannot be shut down without force quitting.
I'm running eclipse on a Macbook. I've probably left out some important details...
Does anyone know why my application is not running as it should? Forgive my naivety, I'm new to java and eclipse.
Many Thanks
EDIT:
import javafx.application.Application;
import javafx.stage.Stage;
public class JavaFX extends Application {
public static void main(String[] args){
launch(args);
}
#Override
public void start(Stage stage) throws Exception {
// TODO Auto-generated method stub
stage.show();
}
}
This simple program also gives the same error.

So I know this is an old question, but I ran into what I believe to be the same issue recently and wanted to share the solution I found (although I have no insight as to why it works).
pictured
Go to Run Configurations for the main class, and on the "Arguments" tab, uncheck the box where it says "Use the -XstartOnFirstThread argument when launching with SWT".
To add a visual example of the problem so that someone more knowledgable than I can possibly explain why this happens/why this solution works:
This is what you get when you try to run the program. An application simply called "java" appears to be running, but nothing is showing.
I hope this information is able to help someone.

possible solution install this from the eclipse marketplace https://www.eclipse.org/efxclipse/install.html

I've had the same problem when I was trying to run JavaFX main class in an existing SWT project with maven dependency:
<dependency>
<groupId>org.eclipse.swt</groupId>
<artifactId>org.eclipse.swt.cocoa.macosx.x86_64</artifactId>
<version>4.3</version>
</dependency>
When I comment out this dependency, application window was shown and everything worked well.

Just to let you know, I created a new project in Eclipse for Java and copy / pasted your code into it. Then just simply clicked on the run icon. It worked perfectly. I'm going to attach screen grabs of my setup for you.

if the pane is not showing up go to run configuration by clicking little arrow by run button and go to argument tab and uncheck the -use the -xstartonfirstthtread box then run again.