How to Resolve JavaFX Media Module Conflicts and IllegalAccessError?

JavaFX Media Application Module Error

Question:

When running a JavaFX 11 application, an error occurs due to a module conflict:

java.lang.IllegalAccessError: class com.sun.media.jfxmediaimpl.NativeMediaManager (in unnamed module @0x4d7be377) cannot access class com.sun.glass.utils.NativeLibLoader (in module javafx.graphics) because module javafx.graphics does not export com.sun.glass.utils to unnamed module @0x4d7be377

Answer:

The error suggests that the JavaFX media module is not being resolved properly as a module, resulting in the conflict. To resolve this, ensure that the javafx.media module is included in the module path.

Three Ways to Resolve the Module Conflict:

1. Include javafx.media in --add-modules:

/usr/lib/jvm/java-11-openjdk-amd64/bin/java \
-p ~/.m2/repository/org/openjfx/javafx-swing/11/javafx-swing-11.jar: \
... \
-classpath ~/development/intellij/OpenPatrician/OpenPatricianStandalone/target/classes: \
... \
--add-modules javafx.controls,javafx.media

2. Make your code modular and add requires javafx.media; to your module descriptor.

3. Use a JDK that includes JavaFX (e.g., BellSoft Liberica or Azul Zulu).

Additional Notes:

• Ensure the JavaFX modules are not also included on the classpath.
• If using Maven, include the javafx.media module as a dependency in your pom.xml.

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