Linux - JAVA_HOME değiştirme

• Open the ~/.bashrc in a text editor. From the command line, the command would be:
  
  gedit ~/.bashrc.
  
  
• Add the following two lines to the 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 JDK you are using. If you have JDK installed in an alternate location, change both variables to reflect your information.
  
  
• Save your file.
  
  
• Restart your terminal session.
  
  
• Type "echo $JAVA_HOME" to ensure the variable has been set correctly.
  

http://www.ehow.com/how_5120825_change-java-home.html