Install Java on Debian 8
Updated by Angel Guarisma
Java is a powerful programming language. Software written in Java can be compiled and run on any system. Unlike Python or C, Java does not come pre-installed on Linode distribution images. This guide installs the OpenJDK 7 runtime environment and development kit in Debian 8. OpenJDK is the free and open-source implementation of the Java SE Development Kit.
Before You Begin
Familiarize yourself with our Getting Started guide and complete the steps for setting your Linode’s hostname and timezone.
This guide will use
Update your system:
sudo apt update && sudo apt upgrade
Install Java Runtime Environment (Java JRE)
If you don’t plan on using Java to write programs, the JRE is all you need. In Debian the JRE metapackage is called
default-jre, this metapackage pulls several packages needed to run headless Java applications.
sudo apt install default-jre
After the installation finishes, you can verify that the JRE was installed by running
dpkg -s default-jre. The output will contain information about the Java installation, including a status line confirming that Java is installed:
Package: default-jre Status: install ok installed
Install Java Development Kit (Java JDK)
If you plan on using Java to write or edit programs on your Linode, install the JDK.
sudo apt install default-jdk
After the installation finishes, verify that the JDK was installed with
dpkg -s default-jdk. The command outputs a status line confirming that Java is installed:
Package: default-jdk Status: install ok installed
You can also check by running
javac, the Java compiler. If you need to compile a java application on your Linode, run
Javac will compile the program, given no compilation errors. You can run the program using
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
This guide is published under a CC BY-ND 4.0 license.