Install Oracle JDK in Ubuntu

Oracle Java is the proprietary, reference implementation for Java. This is no longer currently available in a supported Ubuntu repository. This article shows you the way to manually install the latest Oracle Java Development Kit (Oracle JDK) in Ubuntu.

Note: This article uses JDK8_Update_$java_update_no to demonstrate the installation. In the provided commands, replace the version specific paths and file names to your downloaded version.

Step 1:
Download the latest JDK(jdk-Xuxx-linux-xXX.tar.gz) from this official link.

Step 2:
Open the terminal (Ctrl + Alt + T) and enter the following command.
sudo mkdir /usr/lib/jvm
If the /usr/lib/jvm folder does not exist, this command will create the directory. If you already have this folder, you can ignore this step and move to next step.

Step 3:
Enter the following command to change the directory.
cd /usr/lib/jvm

Step 4:
Extract the jdk-Xuxx-linux-xXX.tar.gz file in that directory using this command.
sudo tar -xvzf ~/Downloads/jdk-8u$java_update_no-linux-x64.tar.gz
According to this command, the JDK filename is jdk-8u$java_update_no-linux-x64.tar.gz and which is located in the ~/Downloads folder. If your downloaded file is in any other location, change the command according to your path.

Step 5:
Enter the following command to open the environment variables file.
sudo gedit /etc/environment

Step 6:
In the opened file, add the following bin folders to the existing PATH variable.
The PATH variables have to be separated by semicolon.
Notice that the installed JDK version is 1.8 update $java_update_no. Depending on your JDK version, the paths can be different.
Add the following environment variables at the end of the file.

The environment file before the modification:
The environment file after the modification:

Save the changes and close the gedit.

Step 7:
Enter the following commands to inform the Ubuntu about the Java's location. Depending on your JDK version, the paths can be different.
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/$java_version/bin/java" 0
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/$java_version/bin/javac" 0
sudo update-alternatives --set java /usr/lib/jvm/$java_version/bin/java
sudo update-alternatives --set javac /usr/lib/jvm/$java_version/bin/javac

Step 8:
To verify the setup enter the following commands and make sure that they print the location of java and javac as you have provided in the previous step.
update-alternatives --list java
update-alternatives --list javac

Step 9:
Restart the computer (or just log-out and login) and open the terminal again.

Step 10:
Enter the following command.
java -version

If you get the installed Java version as the output, you have successfully installed the Oracle JDK in your system.
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Write comments
September 16, 2016 at 3:53 PM delete

Not a bad idea to also update default-java sym link:

sudo ln -sfn /usr/lib/jvm/jdk1.8.0_102/ /usr/lib/jvm/default-java


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