Java 8 Installation on Ubuntu 16.04

1. Download Java package jdk-8u121-linux-i586.tar.gz
2. Run below script  from .tar.gz path as  $ sh javasetup.sh

#!/bin/bash
#######################################################
#  Script for Installing Oracle Java on Ubuntu 16.04
#######################################################

sudo mkdir /usr/local/java
sudo tar -xvf jdk-8u121-linux-i586.tar.gz -C /usr/local/java

# Setup the location of java, javac and javaws (--install symlink name path priority)
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_121/jre/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.8.0_121/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_121/jre/bin/javaws" 1

# Use this Oracle JDK/JRE as the default (--set name path)
sudo update-alternatives --set java /usr/local/java/jdk1.8.0_121/jre/bin/java
sudo update-alternatives --set javac /usr/local/java/jdk1.8.0_121/bin/javac
sudo update-alternatives --set javaws /usr/local/java/jdk1.8.0_121/jre/bin/javaws

http://www.javahelps.com/2015/03/install-oracle-jdk-in-ubuntu.html