Just for myself.
http://www.liberiangeek.net/2012/04/install-oracle-java-jdk-7-in-ubuntu-12-04-precise-pangolin/
Fast installation documentation:
wget ... tar xzf jdk-7u7-linux-i586.tar.gz sudo mkdir -p /usr/lib/jvm/jdk1.7.0 sudo mv ../jdk1.7.0_07/* /usr/lib/jvm/jdk1.7.0/ sudo chown root.root -R /usr/lib/jvm/jdk1.7.0/ sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0/bin/java" 1 sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0/bin/javac" 1 sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.7.0/bin/javaws" 1 mkdir -p ~/.mozilla/plugins/ ln -s /usr/lib/jvm/jdk1.7.0/jre/lib/i386/libnpjp2.so ~/.mozilla/plugins/