Java on Windows
From Wiki @ Karl Jones dot com
This article concerns Java (programming language) on Microsoft Windows.
Java SE Development Kit 8u25 on a 64-bit Windows 8
Set the following user environment variables (environment variables of type user variables):
JAVA_HOME : C:\Program Files\Java\jdk1.8.0_25 JDK_HOME : %JAVA_HOME% JRE_HOME : %JAVA_HOME%\jre CLASSPATH : .;%JAVA_HOME%\lib;%JAVA_HOME%\jre\lib PATH : your-unique-entries;%JAVA_HOME%\bin (make sure that the longish your-unique-entries does not contain any other references to another Java installation folder.
Notice that all these environment variables are derived from the "root" environment variable JAVA_HOME. This makes it easy to update your environment variables when updating the JDK. Just point JAVA_HOME to the fresh installation.
Source:
http://stackoverflow.com/questions/1672281/environment-variables-for-java-installation
