Java is the most popular programming language, use to build various type of applications like a desktop application, web application, mobile application, etc. Today I’ll share how to install Java on Ubuntu 16.04 Server.
If you are a little bit confuse to choose between OpenJDK and Oracle Java, you can stick with default OpenJDK available on Ubuntu 16.04.
In this tutorial article, we will walk through the Java installation process on Ubuntu 16.04 machine.
Before continuing this tutorial, make sure you have Ubuntu 16.04 installed machine and a user to login into the system with sudo privileges.
OpenJDK 8 installation on Ubuntu 16.04
OpenJDK 8 is available in Ubuntu 16.04 Operating system as a default JDK.
To install OpenJDK 8 into Ubuntu 16.04 machine, use the following command:
$ sudo apt update $ sudo apt install default-jdk
After completion of JDK installation you can verify it by checking the version of Java, as shown below:
$ sudo java –version
If OpenJDK installed you will get the output like below image:
Now OpenJDK 8 is installed successfully into your Ubuntu 16.04 machine.
OpenJDK 11 Installation on Ubuntu 16.04
The latest version of Java 11 is not available with default repository of Ubuntu 16.04 operating system. The OpenJDK 11 is available with Backports repository of Ubuntu.
To install OpenJDK into Ubuntu machine first need to add backport repository by using below command:
$ echo 'deb http://ftp.debian.org/debian stretch-backports main' | sudo tee /etc/apt/sources.list.d/stretch-backports.list
After adding the repository, update the apt repository package list and install OpenJDK 11 by using the following command:
$ sudo apt update $ sudo apt install openjdk-11-jdk
Oracle Java Installation on Ubuntu 16.04 Linux
You can follow below steps to install Oracle 11 on Ubuntu 16.04.
Step 1 – Install dependencies
$ sudo apt install dirmngr gnupg
Step 2 – Import PPA key and enable the repository
$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 73C3DB2A $ echo 'deb http://ppa.launchpad.net/linuxuprising/java/ubuntu bionic main' | sudo tee /etc/apt/sources.list.d/linuxuprising-java.list
Step 3 – Install Oracle Java 11
$ sudo apt update $ sudo apt install oracle-java11-installer
You will get the screen to accept Oracle license, accept and Java will install.
Step 4 – Verify Java Installation
$ java –version
Java default version Setup
If you have installed multiple Java into your Ubuntu machine, you can check the default version of Java by checking the version, as shown below:
$ java -version
The output of the above command will look like below image:
You can change the default Java version by using “update-alternatives” command, as shown below:
You will get the list of all installed Java version on your Ubuntu machine, Enter the number of the version you want to use as a default and press Enter button.
If you want to remove Java package from your Ubuntu system, you can uninstall it like any other application with the apt package manager.
To uninstall OpenJDK grom your Ubuntu machine you can use below command:
$ sudo apt remove default-jdk
Now you have learned how to install OpenJDK and Oracle Java on Ubuntu operating system.