HOWTO install Java on Ubuntu
Installing Java so you can run .jar files and Java software on Ubuntu is really easy. All you have to do is to pick a version of OpenJDK which is suitable and install it. Here's how.
OpenJDK is the most widely used Java on Linux. It's included in the default repositories of all distributions. This makes it really easy to install compared to alternatives like Oracle's JDK.
There are many major version of OpenJDK available. Simply search for openjdk to see what major versions you can install. The default proposed by the distribution is named
default-jre. To install it type:
|sudo apt install default-jre|
OpenJDK 11 is the default on Ubuntu Disco Dango.
Search to see what other versions are available:
|sudo apt-cache search openjdk|
This will list a lot of versions. If you want a newer version like OpenJDK 13 or an older version like OpenJDK 8 you can simply specify the
-version-number and add
-jre. To get 13 you would ask for:
|sudo apt install openjdk-13-jre|
You can check what, if any, Java version is installed by running java with -version as an option:
Java programs are generally distributed as .jar files. You can run them with
|java -jar Myprogram.jar|