Java not updating
If an application has left it up to the system on which it is running to determine which version to use, and you have JRE 7 and JRE 8, only JRE 8 will be used.If an application has specified JRE 7, and you have both on your system, JRE 7 will be used.To achieve this goal Windows and OS X users that rely on Java’s auto-update mechanism will have their JRE 7 replaced with JRE 8.The Java auto-update process updates the latest version of Java on a user’s Windows and OS X machine.
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.
Upgrading to the latest Java version improves the security of your system, as older versions do not include the latest security updates.
Java allows you to play online games, chat with people around the world, calculate your mortgage interest, and view images in 3D, just to name a few.
Developers can download the JDK for all supported operating systems from the Oracle Technology Network.
Java technology allows you to work and play in a secure computing environment.
Nevertheless on Windows systems, if you would like to continue to have both versions, JRE 7 and JRE 8 can be installed on the same computer.