[Debian7] Install Oracle Java

$ su -

# echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu precise main" | tee -a /etc/apt/sources.list

# echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu precise main" | tee -a /etc/apt/sources.list

# apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886

# apt-get update

# apt-get install oracle-java7-installer