Installing Java and Setting JAVA_HOME

For any applications built around java requires JAVA_HOME variable to be set, here is how to setup JAVA_HOME for both Linux/Unix and windows environment.

To Install the JDK Software and Set JAVA_HOME on a UNIX System

1. Install the JDK software.
   1. Go to http://java.sun.com/javase/downloads/index.jsp.
   2. Select the appropriate JDK version and click Download.The JDK software is installed on your computer, for example, at /usr/jdk/jdk1.6.0_02. You can change this location.
2. Set JAVA_HOME.
   • Korn and bash shells:
     
     export JAVA_HOME=jdk-install-dir
     export PATH=$JAVA_HOME/bin:$PATH
   • Bourne shell:
     
     JAVA_HOME=jdk-install-dir
     export JAVA_HOME
     PATH=$JAVA_HOME/bin:$PATH
     export PATH
   • C shell:
     
     setenv JAVA_HOME jdk-install-dir
     setenv PATH $JAVA_HOME/bin:$PATH
     export PATH=$JAVA_HOME/bin:$PATH

To Install the JDK Software and Set JAVA_HOME on a Windows System

• Install the JDK software.
  1. Go to http://java.sun.com/javase/downloads/index.jsp.
  2. Select the appropriate JDK software and click Download.The JDK software is installed on your computer, for example, at C:Program FilesJavajdk1.7. You can move the JDK software to another location if desired.
• Set JAVA_HOME:
  1. Right click My Computer and select Properties.
  2. On the Advanced tab, select Environment Variables, and then edit JAVA_HOME to point to where the JDK software is located, for example, C:Program FilesJavajdk1.7.