Install OpenJDK on Ubuntu 20.04

OpenJDK (Open Java Development Kit) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE).

Before you begin, let’s update the apt package index:

sudo apt update

Now let’s install it (it can take a few minutes as there is almost 1GB to download)

sudo apt install default-jdk

And let’s test it…

java --version