How to Install Java in Ubuntu

If you are a bit into computers you must know that Java is a must for several or I would say many important applications. By default JDK is not installed in Ubuntu, so to use your system to its full extent we have to install it separately.  

Oracle JAVA 8 is the stable release and available to download and install on the official download page.

Oracle Java PPA for Ubuntu is maintained by Webupd8 Team and can be downloaded from there easily, setting everything for you automatically.

Here is a tutorial to install Oracle Java 17 and Oracle Java 20 on your distro.

Install Java from default PPA

sudo apt install openjdk-11-jre
sudo apt install openjdk-11-jdk

To install a different Java version, replace ’11’ with the version number.

How To Install Java in Ubuntu?

Basically we will have to install the packages and then run the installer. Java will be installed easily.

Step 1: Add the PPA

To add the PPA open the terminal (Ctrl+Alt+T) and run the following command –

This requires admin rights so we will have to use sudo.

​For Oracle Java 7/8:

sudo add-apt-repository ppa:webupd8team/java 

To enter the password after running this command and press Enter.

Press Enter again to add.

Step 2: Update system

After adding Java repo we need to update the system using apt command –

Use the command :

sudo apt update

Step 3: Run the installer. The installer installs Java on your computer.

On running it, it asks for some permissions which you must grant.

Run the following command :

​For Oracle Java 7:

sudo apt-get install oracle-java7-installer

For Oracle Java 8:

sudo apt-get install oracle-java8-installer

Next screen will appear for the license agreement, so press OK.

The next screen will ask if you want to install. Choose YES and press Enter.

Your system now has Java installed.

Step 4: Configure Java’s default variables

To automatically set up the Java 7 environment variables JAVA_HOME and PATH:

sudo apt-get install oracle-java7-set-default 

To automatically set up the Java 8 environment variables JAVA_HOME and PATH:

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

Enjoy the power of Java on your system. For any assistance or problem ask me in the comment box.