Windows

• 1). Click on "Properties" under "My Computer."
  
  
• 2). Select the "Advanced" tab.
  
  
• 3). Click on "Environmental Variables."
  
  
• 4). Type the path to the Java JDK folder next to "JAVA_HOME". The default location is "C:\Program Files\Java|jdk<version>." Replace <version> with the version number of the installed JDK.
  
  

Linux/Unix

• 1). Open the file "~/.bashrc" in any text editor.
  
  
• 2). Add the following two lines to the ".bashrc" file:
  export JAVA_HOME=/usr/java/jdk<version>/bin/java
  export PATH=$PATH:/usr/java/jdk<version>/bin
  Replace <version> with the version number of the installed JDK.
  
  
• 3). Save and close the file.
  
  
• 4). Open a terminal window. The terminal window will be found in the operating system's main "Application" menu, under either "System Tools" or "Utilities". You will be presented with a command prompt.
  
  
• 5). Type "echo $JAVA_HOME" (no quotes) to test your configuration.