WebConsoleListener IllegalAccessError in JavaFX 12 - javafx

Question

I recently downloaded the latest JavaFX SDK 12 and I wish to intercept Console Messages in my JavaFX WebView.
So, I have this
WebConsoleListener.setDefaultListener((webView, message, lineNumber, sourceId) -> {
//////// I am listening for a specific console message here in my
///webview
});
but I keep getting
Caused by: java.lang.IllegalAccessError: class rumbler.launcher.ApplicationLoader (in unnamed module #0x5c4c6905) cannot access class com.sun.javafx.webkit.WebConsoleListener (in module javafx.web) because module javafx.web does not export com.sun.javafx.webkit to unnamed module #0x5c4c6905
Here is my build.gradle file
javafx {
version = "12.0.1"
modules = ['javafx.base', 'javafx.controls', 'javafx.web']
}
Here are my VM OPTIONS
--module-path "path_to_\javafx-sdk-11.0.2\lib" --add-modules javafx.controls,javafx.fxml,javafx.web,javafx.base
.Am I missing something?

Answer 1

You are using private API, which is not advised.
Anyway, the error message is quite clear:
module javafx.web does not export com.sun.javafx.webkit to unnamed module #0x5c4c6905
Whenever you want to access some non-exposed package from your project (either modular on non-modular), you need to use --add-exports:
The command line option --add-exports $module/$package=$readingmodule exports $package of $module to $readingmodule. Code in $readingmodule can hence access all public types in $package but other modules can not. [source].
So in this case, the solution is straight forward:
--add-exports javafx.web/com.sun.javafx.webkit=ALL-UNNAMED \
--module-path "path_to_\javafx-sdk-11.0.2\lib" \
--add-modules javafx.web,javafx.fxml