You can get Oracle Java via standard package management on Ubuntu through the webupd8 repos. I’ve had good luck using their repositories so far (info about their PPA’s here):
http://www.webupd8.org/p/ubuntu-ppas-by-webupd8.html
You can get it installed pretty easily via the steps below:
# Add the PPA for the Repository
sudo apt-add-repository ppa:webupd8team/java
# Update Package Cache
sudo apt-get update
# Trigger install of Java 8
sudo apt-get install oracle-java8-installer
It isn’t affiliated with Oracle (their repo doesn’t include the JRE/JDK binaries, the download and installation of those is simply coordinated by their package), but like I said, I’ve had good luck with them for a long time on my Ubuntu installs.