In this tutorial, we will show you how to install Java on Linux Mint 20. For those of you who didn’t know, Java is a very popular language when it comes to programming. It is a common language for android development and other enterprise solutions. It was first released by Sun Microsystems in 1995. Many programs and scripts require Java to run it, but usually, Java is not installed by default on a VPS or Dedicated Server.
There are two main implementations of Java.
- Oracle Java – This requires a commercial license as it targets enterprise customers who value stability and Long term support.
- OpenJDK – This is a free and open-source implementation of the Java Platform, Standard Edition.
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 Java on a Linux Mint 20 (Ulyana).
Install Java on Linux Mint 20 Ulyana
Step 1. Before running the tutorial below, it’s important to make sure your system is up to date by running the following
apt commands in the terminal:
sudo apt update
Step 2. Installing Java on Linux Mint 20.
Run the following command to install OpenJDK on the Linux Mint system:
sudo apt install default-jdk
You can as well select a specific version bypassing the version number to the package name:
sudo apt install openjdk-14-jdk
After successfully installing JDK, we can check if Java was correctly installed by using the command:
$ java -version
openjdk 11.0.7 2021-01-14 OpenJDK Runtime Environment (build 11.0.7+10-post-Ubuntu-6ubuntu1) OpenJDK 64-Bit Server VM (build 11.0.7+10-post-Ubuntu-6ubuntu1, mixed mode, sharing)
Step 3. Selecting default Java Version on Linux Mint 20.
You can also change the default Java version and update-alternatives on your system by entering the following command:
sudo update-alternatives --config java
In my example I’m switching to Java 11:
$ sudo update-alternatives --config java [sudo] password for idroot.us: There are 3 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ * 0 /usr/lib/jvm/java-14-openjdk-amd64/bin/java 1411 auto mode 1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode 2 /usr/lib/jvm/java-13-openjdk-amd64/bin/java 1311 manual mode 3 /usr/lib/jvm/java-14-openjdk-amd64/bin/java 1411 manual mode Press <enter> to keep the current choice[*], or type selection number: 1 update-alternatives: using /usr/lib/jvm/java-11-openjdk-amd64/bin/java to provide /usr/bin/java (java) in manual mode
Confirm the new default Java version:
Congratulations! You have successfully installed Java. Thanks for using this tutorial for installing the latest version of Java on the Linux Mint system. For additional help or useful information, we recommend you to check the official Java website.