Oracle Java JDK Installation Instructions

oracle-jdk-installation.md

To install the latest Oracle JDK, please visit Install the latest Oracle JDK on Linux.

Install Oracle JDK 11 on Linux

Step 1:

• Download the latest JDK(jdk-11.0.8_linux-x64_bin.tar.gz) from the official site.

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 the 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-11.0.8_linux-x64_bin.tar.gz

According to this command, the JDK filename is jdk-11.0.8_linux-x64_bin.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 nano /etc/environment

According to your personal preference, you can choose any text editors instead of nano.

Step 6:

• In the opened file, add the following bin folder to the existing PATH variable.

$ /usr/lib/jvm/jdk-11.0.8/bin

• The PATH variables must be separated by colon.

• Add the following environment variables at the end of the file.

$ JAVA_HOME="/usr/lib/jvm/jdk-11.0.8"

• 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/jdk-11.0.8/bin" JAVA_HOME="/usr/lib/jvm/jdk-11.0.8"

• Save the changes and close nano (Ctrl + O, Ctrl + X).

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/jdk-11.0.8/bin/java" 0

$ sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk-11.0.8/bin/javac" 0

$ sudo update-alternatives --set java /usr/lib/jvm/jdk-11.0.8/bin/java

$ sudo update-alternatives --set javac /usr/lib/jvm/jdk-11.0.8/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.

Tutorial: https://www.javahelps.com/2017/09/install-oracle-jdk-9-on-linux.html