Setup Java

Java is a computer programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies as possible. Here is easy way to setup java on Centos 6, and choose it version

1. Download and setup Java: Oracle Java

   tar -xzf jdk-7u79-linux-x64.tar.gz
   mv jdk1.7.0_79 /opt/
   

2. Configure Java

   cd /opt/jdk1.7.0_79
   alternatives --install /usr/bin/java java /opt/jdk1.7.0_79/bin/java 5
   alternatives --config java
   

3. Declare JAVA_HOME

   vi $HOME/.bash_profile
   

   # add following export command after line "export PATH"
   export JAVA_HOME=/opt/jdk1.7.0_79
   export JRE_HOME=/opt/jdk1.7.0_79/jre
   export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
   

4. Reload .bash_profile

   source $HOME/.bash_profile
   

5. Useful resources

   Snippet Java

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   How To Set TimeZone in Java