Where I work, I am kind of the Linux guy, installing our software for clients who wish to run it on Ubuntu machines.
The problem is that our software runs on Java, and some of the people either don't know how to install Java or have it installed in a weird way.
I was asked what was the easiest way to install Java, and here you go:
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer
(agree to the two prompts)
(wait for download to finish)
The first 2 commands installs the webupd8team Java repository and updates apt-get so you can install from there.
The next command actually installs it, with a license agreement and a download.
The last command just confirms that you have Java installed.