Upgrading Java on Raspberry pi

I required a later version on Java that the one that came with Raspbian.  This was required for OpenHAB.  So how do you upgrade your version of Java?  Run the following commands:

sudo su 
echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main" | tee /etc/apt/sources.list.d/webupd8team-java.list
echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main" | tee -a /etc/apt/sources.list.d/webupd8team-java.list 
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EEA14886 
apt-get update 
apt-get install oracle-java8-installer 
Exit

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