Installing Java and Setting JAVA_HOME

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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.

JAVA_windows

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