Installing Java OpenJDK from .tar.gz archive and update the default JDK version

So, you are puzzled how to install JDK from tar.gz file in your Ubuntu system? In reality it’s pretty simple. Let’s start with the download first.

Open: https://jdk.java.net/16/ the latest version now is JDK 16.0.1 be careful and select proper architecture for your machine. For general x64 linux machines it’s named Linux / x64. Or you can just get it from the terminal like this:

user@ubuntu:~$ cd ~/Downloads
user@ubuntu:~$ wget https://download.java.net/java/GA/jdk16.0.1/7147401fd7354114ac51ef3e1328291f/9/GPL/openjdk-16.0.1_linux-x64_bin.tar.gz

Now you have your openjdk-16.0.1_linux-x64_bin.tar.gz in the Downloads folder the next step is to extract it to the /opt folder like so:

user@ubuntu:~$ sudo tar xvf ~/Downloads/openjdk-16.0.1_linux-x64_bin.tar.gz -C /opt

and let’s verify that we have all the files we are expecting in the /opt folder:

user@ubuntu:~$ ls -la /opt 

We should see something like:

So we are all good and now we can continue with the installation, let’s run:

user@ubuntu:~$ sudo update-alternatives --install /usr/bin/java java /opt/jdk-16.0.1/bin/java 1000

and the same idea for Java Compiler:

user@ubuntu:~$ sudo update-alternatives --install /usr/bin/javac javac /opt/jdk-16.0.1/bin/javac 1000

Now we have our JDK installed it’s time to make sure we are using the correct version. If you don’t have any other versions of Java installed you can safely skip this part. Otherwise let’s update the default JDK that our system will be using.

user@ubuntu:~$ sudo update-alternatives --config java

Possible output may look like this:

There are 2 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                      Priority   Status
------------------------------------------------------------
* 0            /opt/jdk-17/bin/java       1001      auto mode
  1            /opt/jdk-16.0.1/bin/java   1000      manual mode
  2            /opt/jdk-17/bin/java       1001      manual mode

Press <enter> to keep the current choice[*], or type selection number: 

Now we need to select the version we are planning to use – in my case I’ll need to input 1 and press Enter. And let’s just run this command one more time to see if we have changed the default JDK:

user@ubuntu:~$ sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                      Priority   Status
------------------------------------------------------------
  0            /opt/jdk-17/bin/java       1001      auto mode
* 1            /opt/jdk-16.0.1/bin/java   1000      manual mode
  2            /opt/jdk-17/bin/java       1001      manual mode

Press <enter> to keep the current choice[*], or type selection number: 

Now repeat the drill for Java compiler:

user@ubuntu:~$ sudo update-alternatives --config javac

Select the version we have just installed:

There are 2 choices for the alternative javac (providing /usr/bin/javac).

  Selection    Path                       Priority   Status
------------------------------------------------------------
* 0            /opt/jdk-17/bin/javac       1001      auto mode
  1            /opt/jdk-16.0.1/bin/javac   1000      manual mode
  2            /opt/jdk-17/bin/javac       1001      manual mode

Press <enter> to keep the current choice[*], or type selection number:

And verify the result by running the same command:

user@ubuntu:~$ sudo update-alternatives --config javac
There are 2 choices for the alternative javac (providing /usr/bin/javac).

  Selection    Path                       Priority   Status
------------------------------------------------------------
  0            /opt/jdk-17/bin/javac       1001      auto mode
* 1            /opt/jdk-16.0.1/bin/javac   1000      manual mode
  2            /opt/jdk-17/bin/javac       1001      manual mode

Press <enter> to keep the current choice[*], or type selection number: 

Alright! We are all good! Now it’s the time to verify that we are all good and our version is the one we expected:

user@ubuntu:~$ java -version && javac -version

Our output is expected to be something like:

openjdk version "16.0.1" 2021-04-20
OpenJDK Runtime Environment (build 16.0.1+9-24)
OpenJDK 64-Bit Server VM (build 16.0.1+9-24, mixed mode, sharing)
javac 16.0.1

Purrrfect! This is what we were looking for! Good job!

2 comments

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.