If you plan to Java applications, install the Java Development Kit (JDK). A: The Java FX SDK and Runtime are included in the installation of the JDK and JRE respectively, and they are integrated into the same directory structure.
For information on how to work with Java FX, see the Java FX Documentation.
Q: How do I find out which version of Java is the system default?
A: If you have not yet installed Apple's Java Mac OS X 2012-006 update, then you are still using a version of Apple Java 6 that includes the plug-in and the Java Preferences app.
Java applications, install the Java Runtime Environment (JRE). Once you have installed the JRE, you can launch Java applets and applications by double-clicking JAR files, JNLP files, and via the browser.