remove java 8 from ubuntu code example

Example 1: linux remove java 11

sudo apt remove openjdk-11*
sudo apt remove icedtea*

Example 2: how to uninstall openjdk in linux

sudo apt-get autoremove openjdk-11-jre

Example 3: uninstall java 11 linux

sudo update-alternatives --remove "java" "/usr/lib/jvm/jdk[version]/bin/java"