update my java version code example
Example: change java version
/usr/libexec/java_home -V
export JAVA_HOME=`/usr/libexec/java_home -v 1.6.0_65-b14-462` //java 8
/usr/libexec/java_home -V
export JAVA_HOME=`/usr/libexec/java_home -v 1.6.0_65-b14-462` //java 8