installing java 11 on ubuntu 20.04 code example
Example 1: how to install java 8 on ubuntu 20.04
sudo apt update
sudo apt install openjdk-11-jdk
sudo apt update
sudo apt install openjdk-8-jdk
Example 2: install java on ubuntu 20.04
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EA8CACC073C3DB2A