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Installing Open Java JDK/JRE on Ubuntu 17.04

Want to install Java JDK/JRE on Ubuntu 17.04? This brief tutorial is going to show students and new users how to easily do it. In the past, one could easily install Oracle Java by simply enabling Ubuntu Partner’s repository and using apt-get command. Not anymore.

Now there’s an open source alternative to Oracle JAVA that can easily be installed via simple apt-get command and is as must compatible to probably all Java based applications.

If you want to install Oracle Java JDK/JRE, you must go and download the package from its download page and run the installer.

This post is not about installing Oracle Java, but its alternative called Open Java JDK/JRE. Oracle Java isn’t the default anymore, now Open Java JDK/JRE is.

To install OpenJava on Ubuntu, continue with the steps below:

Step 1: Update Ubuntu

First run the update commands to update Ubuntu. To do that, run the commands below:

sudo apt-get update

After running the commands above, Ubuntu should prompt you to update any package that needs to be updated.

Step 2: Check if Java is Installed

After running Ubuntu update commands, run the commands below to check if any Java is installed on the system. To check if Java is installed on your systems, run the commands below.

java --version

If Java is not installed on the systems, you should see the lines below notifying you that Java is not installed, but then suggesting Java packages and how to install them. Now all you have to do is select the package from the list you want and run the apt-get command.

richard@ubuntu1704desk:~$ java --version
The program 'java' can be found in the following packages:
* default-jre
* openjdk-8-jre-headless
* gcj-4.8-jre-headless
* gcj-4.9-jre-headless
* gcj-5-jre-headless
* gcj-6-jre-headless
* openjdk-9-jre-headless
Try: sudo apt install <selected package>
richard@ubuntu1704desk:~$

For this post, we want to install Java JDK/JRE so the obvious choice is default-jre

Step 3: Installing Java JDK/JRE

Now that you know the package to install, run the commands below to install Java JDK/JRE on Ubuntu.

sudo apt-get install default-jre

Accept the list of required packages that will also be installed by typing y for Yes. Doing that will install Open Java JDK/JRE on Ubuntu.

Now when you run the command to check whether Java is installed, you should get the results below.

openjdk 9-Ubuntu
OpenJDK Runtime Environment (build 9-Ubuntu+0-9b161-1)
OpenJDK 64-Bit Server VM (build 9-Ubuntu+0-9b161-1, mixed mode)

And this is how to install Open Java JDK/JRE on Ubuntu.

Summary:

This post shows students and new users an easy way to Open Java JDK/JRE on Ubuntu systems. It’s an alternative to Oracle Java and the default for Linux and Ubuntu systems. If you’re going to be installing applications that require Java, then follow the steps above to install it.

Enjoy!

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