Add repository
sudo add-apt-repository ppa:webupd8team/java
Update
sudo apt-get update
Install Java
sudo apt-get install oracle-java8-installer
Setting Java environment variables
sudo apt-get install oracle-java8-set-default
chk java version
java -version
Get installation path
which java
Switching between Oracle Java 8 and Java 7
sudo update-java-alternatives -s java-7-oracle
Setting Up JAVA_HOME
Edit /etc/profile (sudo nano /etc/profile ) and add the following
export JAVA_HOME=/usr/lib/jvm/java-8-oracle
save the file and execute
source
/etc/profile