How to Remove Oracle Java JDK 8 Ubuntu 15.04 14.10 14.04 13.10

1)
Check which JDK packages are installed
#sudo dpkg --list | grep -i jdk



2)
Remove Oracle Java 8
#sudo apt-get purge oracle-java8-installer
OR
#sudo apt-get remove oracle-java8-installer

3)
Check that all JDK packages have been removed
#sudo dpkg --list | grep -i jdk