Install Oracle JDK 8 on Linux

Oracle Java is the proprietary, reference implementation for Java. This article shows you the way to manually install Oracle Java Development Kit 8 (Oracle JDK) on Linux.

Note: This article is using 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.

Oracle JDK 16 has been released

Version specific installation guides are available here:

• Install Oracle JDK 8 on Linux
  
• Install Oracle JDK 11 on Linux
• Install Oracle JDK 14 on Linux
• Install Oracle JDK 15 on Linux
• Install Oracle JDK 16 on Linux (The latest version)
  
• Install the latest Oracle JDK on Linux (Permanent link to install the latest version)
  

Step 1:

Download the latest JDK(jdk-8u$java_update_no-linux-x64.tar.gz) from this official site.

This article assumes that you have a x64 bit Linux distribution as most of the famous Linux distributions have dropped the support for x86 architecture. However, if you are using an x86 bit Linux distribution, download the jdk-8u$java_update_no-linux-i586.tar.gz from the official site and change the following commands according to the filename

DOWNLOAD

If you want to download to a remote server or if you simply prefer wget, use the command given in this Stackoverflow answer: Downloading JDK

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-8u$java_update_no-linux-x64.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.

/usr/lib/jvm/$java_version/bin
/usr/lib/jvm/$java_version/db/bin
/usr/lib/jvm/$java_version/jre/bin

The PATH variables have to be separated by a colon.

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.

J2SDKDIR="/usr/lib/jvm/$java_version"
J2REDIR="/usr/lib/jvm/$java_version/jre"
JAVA_HOME="/usr/lib/jvm/$java_version"
DERBY_HOME="/usr/lib/jvm/$java_version/db"

The environment file before the modification:

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

The environment file after the modification:

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/$java_version/bin:/usr/lib/jvm/$java_version/db/bin:/usr/lib/jvm/$java_version/jre/bin"
J2SDKDIR="/usr/lib/jvm/$java_version"
J2REDIR="/usr/lib/jvm/$java_version/jre"
JAVA_HOME="/usr/lib/jvm/$java_version"
DERBY_HOME="/usr/lib/jvm/$java_version/db"

Save the changes and close the gedit.

Step 7:

Enter the following commands to inform the system 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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