无法在 MacOS 上的 Eclipse 上安装 JavaFX

Question

I am unable to install JavaFX on Eclipse. I get this error message when attempting to run HelloFX:

Error: Could not find or load main class javafx.fxml Caused by: java.lang.ClassNotFoundException: javafx.fxml

I have a Mac Pro 5,1 running MacOS 10.14.6 Mojave. It is heavily upgraded, and I do not believe that this is the issue, although it is a 2012 machine.

I have tried earlier and later versions of JDK, JFX and Eclipse. Either with no change or worse results. AdoptOpenJDK version 8.0 produced additional errors. Currently I have installed:

AdoptOpenJDK 16 and AdoptOpenJDK-11.0.11+9 were both tried, and placed in the usual directory: /Library/Java/JavaVirtualMachines/jdk-16.jdk/

This line was added to.bash_profile export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-16.jdk/Contents/Home

javafx-sdk-11.0.2 was placed in: /Library/Java/Extensions/javafx-sdk-11.0.2/lib And the following line added to.bash_profile: export PATH_TO_FX=Library/Java/Extensions/javafx-sdk-11.0.2/lib

Eclipse Version: 2021-03 (4.19.0) was installed using the installer app. version 1.20.0, after clearing out the 'hidden' config files from earlier versions.

/Users/baron/JWS was configured as the Java Work Space. All old java project, packets and other files were removed to a backup location before installation of Eclipse. A project was built using the HelloFX files from openjfx "Getting Started with JavaFX".

~/JWS/HelloJFX/src/HelloFX/Controller.java

~/JWS/HelloJFX/src/HelloFX/Hellofx.fxml

~/JWS/HelloJFX/src/HelloFX/Main.java

A user library was created from the jar files: Preferences/Java/Build Path/User Libraries/JavaFX11

The User Library contained all the expected components. The User Library JavaFX11 was attached to the project, and appeared as expected.

Main args were added as follows: --module-path /path/to/javafx-sdk-15.0.1/lib --add-modules javafx.controls,javafx.fxml

This was copy pasted from the openjfx.io site, so there is no typing error here. Indeed, I followed exactly the instruction on this site.

Incidentally, it was not possible to run any java from the command line if it contained javafx imports (but that is a separate problem).

I have lost days on this already. The answers to others with the similar difficulties have not helped in my case. Expert help very welcome.

Answer 1

JDK with JavaFX bundled

One option is to install a Java implementation on your Mac that comes bundled with the OpenJFX ( JavaFX ) libraries.

At least two vendors provide such a JDK :

• ZuluFX by Azul Systems
• LibericaFX by BellSoft