JavaFX WARNING: \'Unsupported JavaFX Configuration\' - How to Fix the Unnamed Module Error?

JavaFX WARNING: Unsupported JavaFX Configuration: Classes Loaded from 'Unnamed Module @...'

Problem:

Upon installing and running JavaFX, users encounter a warning stating "Unsupported JavaFX configuration: classes were loaded from 'unnamed module @...'."

Background:

This warning stems from the introduction of the Java Platform Module System (JPMS) in Java 9. JavaFX modules must be loaded as "named modules" from the module-path, not the class-path.

Solution:

To resolve this:

• Ensure JavaFX is on the Module-Path: Add JavaFX to the module-path using the --module-path option.
• Resolve JavaFX as Named Modules: For non-modular applications, use the --add-modules option to force Java to resolve JavaFX modules as named modules.
• Modular Applications: Use the --module option to launch your application as a module with the appropriate requires directives in the module-info descriptor.
• Use a JDK Distribution with JavaFX: Install a JDK distribution that includes JavaFX, such as BellSoft Liberica JDK or Azul Zulu JDK, to load JavaFX as named modules automatically.
• Ignore the Warning: As of JavaFX 21, ignoring the warning is an option, but using unsupported configurations may lead to future issues.

Deployment:

• Require Clients to Have JRE with JavaFX: Ensure clients have a JRE with JavaFX installed.
• Distribute a Self-Contained Application: Create a self-contained application using tools like jlink or native image to bundle the application, libraries, and JRE together.
• Executable "Fat" JAR File: Embed JavaFX and all dependencies into an executable JAR file. However, this approach is implicitly unsupported as it loads JavaFX from the unnamed module.

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