Cant find JavaFX in JDK8 for Arm

问题:

I downloaded and installed JDK8u33 for ARM on my beaglebone black, and according to this documentation (http://docs.oracle.com/javase/8/embedded/jdk-arm-8u6/index.html) javafx is included and supported.

However, I can not find jfxrt.jar anywhere in the JRE or JDK, and using javac on a simple javafx program yields "javafx.application" is not a package.

What gives?

回答1:

As @eckig says, since the 8u33 for ARM version, Oracle has removed JavaFX from the ARM distribution.

To run any JavaFX application you can downgrade your version to the last JDK8u6 that supported JavaFX, or you can provide a valid jfxrt.jar.

And you can do it following this tutorial, cross building OpenJFX for ARM, or just using some already built distribution like this one hosted on the JavaFXPorts project.

Once you have downloaded armv6hf-sdk.zip, unzip it and you need to add this command line option to attach this external source to the classpath, with the extension mechanism:

-Djava.ext.dirs=<path to armv6hf-sdk>/rt/lib/ext

For instance, you need this to run one of the JavaFX old samples from its actual path:

sudo /opt/jdk1.8.0_33/bin/java -Djava.ext.dirs=<path to armv6hf-sdk>/rt/lib/ext -jar BrickBreaker.jar

回答2:

The latest version of the Java Development Kit for ARM processors (JDK 8u33 for ARM) no longer supports JavaFX Embedded, it has been all of the tech news, for example here: http://jaxenter.com/jdk-arm-without-javafx-end-javafx-embedded-114212.html