set the java path permanently in linux

c) set the java path

export JAVA_HOME=/usr/java/jdk1.8.0_45

d) Setup JRE_HOME Variable

export JRE_HOME=/usr/java/jdk1.8.0_45/jre

e) Setup PATH Variable

export PATH=$PATH:/usr/java/jdk1.8.0_45/bin:/usr/java/jdk1.8.0_45/jre/bin

environment variable :

/etc/environment

to set the variable permanently.

go to directory
/etc
open profile.
cmd : vi profile

set all the variable at the bottom of the pofile.
check from new command window weather you are able to see the path.