Prevent java from updating
During JDK install, a Java Development Kit folder is created in the Windows Start Menu, which contains the following items: Instead of double-clicking or opening the installer, you can perform a silent, non-interactive, JDK installation by using the command-line arguments.The following table lists example installation scenarios and the commands required to perform them.In these instructions, you run the self-installing executable file to unpack and install the JDK.As part of the JDK, this installation includes an option to include the public Java Runtime Environment.
The Support Repository is updated on a monthly basis, and these updates are called Support Repository Updates (SRU).
Installers for JDK 7u6 and later install the Java FX SDK and integrate it into the JDK installation directory.
Installers for JDK 7u2 to 7u5 install the JDK first, then start the Java FX SDK installer, which installs Java FX SDK in the default directory Starting with JDK 7u40 release, Java menu items are added to the Windows Start Menu to provide easy access to Java resources.
OS X users can only have one JRE available through web browsers so OS X users can not have more than one JRE available through the web browser and will only only have JRE 8 available through the web browser after the upgrade.
Unless you have a support contract with Oracle or a license for Java SE Advanced products you will not be able to get security updates for JRE 7 from Oracle after April 2015 and it is not advisable to keep older versions of Java on your system.