Ubuntu Java

Ubuntu.Java.sh

# You can use the WebUpd8 Java PPA, so you get updates automatically through the package manager.

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
sudo update-java-alternatives -s java-7-oracle
# Are PPA's safe to add to my system and what are some "red flags" to watch out for?
# If you need the latest Oracle Java 6, you install it too:

sudo apt-get install oracle-java6-installer
# If you need the latest Oracle Java 8, you install it too:

sudo apt-get install oracle-java8-installer
# If you want test Oracle Java 9 early access builds, you can install it too:

sudo apt-get install oracle-java9-installer
# To switch between different Java versions, you could use the following terminal command:

sudo update-alternatives --config java