Why doesn't JavaFX work?

Question

Java

I'm just learning and immediately having problems with JavaFX. I added libraries! Installed everything, but everything is exactly the same error!
main:

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"));
        //Parent root = FXMLLoader.load(getClass().getResource("/fxml/main.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


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

Controller:

package sample;

public class Controller {
}

sample.fxml:

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

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<GridPane fx:controller="sample.Controller"
          xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
</GridPane>

It's a mistake!!!

"C:\Program Files\Java\jdk-12\bin\java.exe" "--module-path=C:\Program Files\Java\javafx-sdk-11.0.2\lib--add-modules=javafx.controls" --add-modules javafx.base,javafx.graphics --add-reads javafx.base=ALL-UNNAMED --add-reads javafx.graphics=ALL-UNNAMED "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.1\lib\idea_rt.jar=63514:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Users\dpozh\Desktop\JAVA\JAVA-KOD\lesson16\out\production\lesson16;C:\Program Files\Java\javafx-sdk-11.0.2\lib\src.zip;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx-swt.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.web.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.base.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.fxml.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.media.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.swing.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.controls.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.graphics.jar" -p "C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.base.jar;C:\Program Files\Java\javafx-sdk-11.0.2\lib\javafx.graphics.jar" sample.Main
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$2(LauncherImpl.java:195)
  at java.base/java.lang.Thread.run(Thread.java:835)
Caused by: java.lang.IllegalAccessError: class com.sun.javafx.fxml.FXMLLoaderHelper (in unnamed module @0x7f1029bf) cannot access class com.sun.javafx.util.Utils (in module javafx.graphics) because module javafx.graphics does not export com.sun.javafx.util to unnamed module @0x7f1029bf
  at com.sun.javafx.fxml.FXMLLoaderHelper.<clinit>(FXMLLoaderHelper.java:38)
  at javafx.fxml.FXMLLoader.<clinit>(FXMLLoader.java:2056)
  at sample.Main.start(Main.java:13)
  at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$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$10(PlatformImpl.java:428)
  at java.base/java.security.AccessController.doPrivileged(AccessController.java:389)
  at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
  at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
  at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
  at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
  ... 1 more
Exception running application sample.Main

Process finished with exit code 1

Answer 1

Everything worked, installed jdk 8u201

Answer 2

Hello!
Here is a similar error - https://stackoverflow.com/questions/52906773/intel...

Answer 3

You have an error class com.sun.javafx.fxml.FXMLLoaderHelper (in unnamed module @0x7f1029bf) 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 @0x7f1029bf reports that it can't find/connect something.
Since you had --add-modules javafx.controls in VM options , but not, for example, javafx.fxml and javafx.graphics , I suggest adding them (comma separated after --add-modules javafx.controls ). I spent some time myself, but figured it out. For myself, I wrote the following in the VM options field :

--module-path "C:\Program Files\Java\javafx-sdk-11.0.2\lib" --add-modules javafx.controls,javafx.fxml,javafx.base,javafx.graphics,javafx.web --add-exports javafx.graphics/com.sun.javafx.sg.prism=ALL-UNNAMED

It worked for me))