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IMPORTANT: Ensure that you do not have gradle plugins for NetBeans or Eclipse installed. They will conflict with the pre-generated IDE files.  In furture, we may move to gradle builds within the IDE's as support becomes better.

Get a

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build of the

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JDK8 (8u40 or later)

If you are building and running native libraries, the current native build produces 32-bit libraries. If you attempt to use them in you need to make sure you use the same version of JDK for NetBeans that you use to build JavaFX with gradle. In particular, if you try to mix a 32-bit JDK and a 64-bit JVMJDK, they the binaries will fail to load and presently do not provide much indication about what went wrong. The easiest thing to do is to use a 32-bit JVM. This is not necessary on platforms like Mac that only support 64-bit JVM's.

Get an IDE that supports JDK8

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Once you have downloaded and installed an IDE that is JDK8 aware, you will need to configure it to accept JDK8 syntax and generate the right byte codes.  This will be explained later on for each particular IDE.  If you use an IDE without JDK8 support, such as NetBeans 3.7.1, OpenJFX will not compile and you will not be able to run from within the IDE.

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Delete jfxrt.jar

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(or move it to a different directory)

JavaFX is bundled with the JDK as an extension. The jfxrt.jar is located in the extension directory called 'ext' where Java is installed. You must remove it from this directory for the IDE's to work properly. The issue is this: If jfxrt.jar is in the extension directory, it will get seen before the code in your IDE. This means you won't be running or testing the code in your IDE. For more information on why this is a problem, see Unique Challenges of Working on the JDK.

By moving jfxrt.jar to a standard cache directory, your IDE can reference it to find binary versions of classes that are not yet open source.  Further, when both jfxrt.jar and your IDE reference a class, the class from the IDE will be chosen.

To move jrxrt.jar to the standard cache directory:

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IMPORTANT:  Do not skip this step.  If you do, you will not be running the code in your IDE and will waste hours wondering why you make changes and they don't run.

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