How can I install Java 8 on Ubuntu 18.04?. How to install Java 8 on Ubuntu 16.04?. It is easy to install Java 8 on Ubuntu 18.04 & Ubuntu 16.04. As of this writing, the most recent release of Java is version 11.

install Java 8 on Ubuntu 18.04

We had done an article on installing Java 11 on Ubuntu 18.04/16.04 and Debian 9:

How to Install Java 11 on Ubuntu 18.04 /16.04 / Debian 9

Java is the most popular class-based object-oriented programming language used mostly for building enterprise applications; both the desktop applications and backend web systems.

Programs written in Java are considered to be portable, scalable and simpler to understand. Java also enjoys a huge community of users both in Github, blogs and Stack Overflow.

Install Java 8 on Ubuntu 18.04 / Ubuntu 16.04

You can install Java 8 on Ubuntu 18.04 / Ubuntu 16.04 from OpenJDK binaries available on the default upstream repositories. To do this, run the command:

sudo apt install openjdk-8-jdk

Confirm Java Version

$ java -version
openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-8u191-b12-2ubuntu0.18.04.1-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)

Installing Java 8 from PPA repository

By using Webupd8 Team’s PPA repository, Java 8 can be installed using apt command. But first, the repository needs to be added to your Ubuntu system.

sudo add-apt-repository ppa:webupd8team/java
sudo apt update

When the repository is added, install Java 8 by executing the following command in your terminal.

sudo apt install oracle-java8-installer

To install Java 8 and make the the default on the fly, run the following command instead.

sudo apt install oracle-java8-set-default

Set Default Java version

If you keep switching between different versions of Java, here is a guide for you on how to do it properly.

How to set default Java version on Ubuntu / Debian