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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, you will not be able to run from within the IDE.

Move jfxrt.jar to

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the cache 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 anything. For more information on why this is a problem, see Unique Challenges of Working on the JDK.

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