add javahome to path OSX code example

Example: how to add java_home in mac

1. Open terminal window
2. Type command: $ vim ~/.bash_profile and Hit Enter
3. Type command: $ export JAVA_HOME=$(/usr/libexec/java_home) and press Escape key for Save changes.
4. Type command: :(colon)wq, It will Save and close .bash_profile file.
5. Type command: source ~/.bash_profile and hit Enter
6. Now we can check the value of the JAVA_HOME variable:
7. Type Command: echo $JAVA_HOME
 The result should be the path to the JDK installation:
 /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home