How to install Java 8 on Debian

Step 1 - Add Java 8 PPA

First, you need to add webupd8team Java PPA repository in your system. Edit a new PPA file /etc/apt/sources.list.d/java-8-debian.list in text editor

sudo vim /etc/apt/sources.list.d/java-8-debian.list

and add following content in it.

deb trusty main
deb-src trusty main

Now import GPG key on your system for validating packages before installing them.

sudo apt-key adv --keyserver --recv-keys EEA14886

Step 2 – Install Java 8 on Debian

Now use the following commands to update apt cache and then install Java 8 on your Debian system.

sudo apt-get update
sudo apt-get install oracle-java8-installer

Step 3 – Verify Java Version

Finally, you have successfully installed Oracle Java on your Debian system. Let’s use the following command to verify installed version of Java on your system.

java -version

java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

Step 4 – Setup Java Environment

In Webupd8 PPA repository also providing a package to set environment variables, Install this package using the following command.

sudo apt-get install oracle-java8-set-default