How To Install Java on Debian 9 Stretch

Install Java on Debian 9 Stretch

In this tutorial, we will show you how to install Java on Debian 9 Stretch. Many programs and scripts require java to run it, but usually, Java is not installed by default on VPS or Dedicated Server.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS.  The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step by step installation of JRE (Java Runtime Environment) and JDK (Java Development Kit) on Debian 9 (Stretch).

Install Java on Debian 9 Stretch

Step 1. Before we install any software, it’s important to make sure your system is up to date by running these following apt-get commands in the terminal:

apt-get update
apt-get upgrade

Step 2. Installing Java on Debian 9 Stretch.

Method 1. Install Java using apt:

apt-get install default-jre

To install the Java Developer Kit (JDK), execute this command:

apt-get install default-jdk

Method 2: Manual installation of OpenJDK:

First, Go to the download page for the OpenJDK software package, and right-click on the tar.gz link found to the right of the “Linux” option. Click on “Copy link address” or “Copy link”.

wget <paste-the-download-link>

Create a directory where you wish to install your OpenJDK environment:

mkdir <enter-path-and-directory-name>

Then, extract the tarball to your new directory:

tar xvzf openjdk-10.0.1_linux-x64_bin.tar.gz -C <path-to-your-new-directory>

Next, Create a new file in /etc/profile.d/ named “jdk10.sh”. The full path should be “/etc/profile.d/jdk10.sh”:

export JAVA_HOME="<insert-install-directory>/jdk-10.0.1"
export PATH="$PATH:${JAVA_HOME}/bin"

Verify installed Java version:

java -version

Congratulations! You have successfully installed Java. Thanks for using this tutorial for installing Oracle Java (JRE or JDK) on Debian 9 Stretch system. For additional help or useful information, we recommend you to check the official Java on website.

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