How to add an environment variable for your java jdk unix OS

gistfile1.txt

open the terminal, make sure you are in your home directory
run the following
  =>ls
  find the and open the .bash_profile file in an editor with "open -e .bash_profile file", 
  if not create using => "vim ~/.bash_profile"
  enter :  "export $JAVA_HOME=$(/usr/libexec/JAVA_HOME)"
  run => source ~/.bash_profile
  To verify the environment variable was been created, run => "echo $JAVA_HOME"or "export | grep JAVA"