Updating my java
If an application has specified JRE 7, and you have both on your system, JRE 7 will be used.
OS X users can only access one JRE version through a browser; other versions might be available in the system but will not be available through the browser.
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.
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.
After the End of Public Updates for Java 7 in April 2015, if you have a valid support contract for an Oracle Product that requires Java, or an Oracle Java SE Support contract, you can download the support versions of Java from My Oracle Support.
Oracle will continue to provide updates for JRE 7 for our customers with support contracts after the End of Public Updates to JRE 7.
Java reduces costs, shortens developer timeframes, drives innovation, and improves application services as the programming language of choice for enterprise architecture, finance, and HR.
Java is used in many industries including manufacturing, automotive, insurance, and public sector.
See the Applet Deployment documentation on setting the JRE version for applets.See the JNLP File Syntax documentation for how to set the JRE version for a webstart application.See the Java SE documentation for APIs, Developer guides, Release Notes and more.Get enterprise-grade support from the primary contributor to the Java platform.Develop secure, portable, high-performance applications for the widest range of computing platforms possible while boosting user productivity and dramatically reducing the cost of application ownership.