Install openjdk-11-jdk by entering the following commands in the terminal:
sudo apt update sudo apt install openjdk-11-jdk
Description:
OpenJDK Development Kit (JDK)
OpenJDK is a development environment for building applications, applets, and components using the Java programming language.
Homepage: http://openjdk.java.net/
Version: 10.0.1+10-3ubuntu1
Section: java