Jak nainstalovat Javu v Debianu

Postup

Stáhnout Java JDK

mkdir /opt/jdk
tar -zxf jdk-8u5-linux-x64.tar.gz -C /opt/jdk
update-alternatives --install /usr/bin/java java /opt/jdk/jdk1.8.0_05/bin/java 100
update-alternatives --install /usr/bin/javac javac /opt/jdk/jdk1.8.0_05/bin/javac 100
update-alternatives --display java
update-alternatives --display javac

Aktualizace

update-alternatives --install /usr/bin/java java /opt/jdk/jdk.new.version/bin/java 110
update-alternatives --install /usr/bin/javac javac /opt/jdk/jdk.new.version/bin/javac 110
update-alternatives --remove java /opt/jdk/jdk.old.version/bin/java
update-alternatives --remove javac /opt/jdk/jdk.old.version/bin/javac
rm -rf /opt/jdk/jdk.old.version

Návod zde
https://www.digitalocean.com/community/tutorials/how-to-manually-install-oracle-java-on-a-debian-or-ubuntu-vps