how to install jdk on ubuntu 18.04 code example

Example 1: instalar java ubuntu 18.04

sudo apt install default-jre

Example 2: instalar java ubuntu 18.04

OutputCommand 'java' not found, but can be installed with:

apt install default-jre            
apt install openjdk-11-jre-headless
apt install openjdk-8-jre-headless