Install directory of our version of java: /usr/lib/jvm/jdk1.8.0_20

Create a file .java-1.8.0.20-oracle.jinfo with the following content:

alias=java-8-oracle
priority=100
section=non-free



jre ControlPanel /usr/lib/jvm/jdk1.8.0_20/jre/bin/ControlPanel
jre java /usr/lib/jvm/jdk1.8.0_20/jre/bin/java
jre javaws /usr/lib/jvm/jdk1.8.0_20/jre/bin/javaws
jre jcontrol /usr/lib/jvm/jdk1.8.0_20/jre/bin/jcontrol
jre jjs /usr/lib/jvm/jdk1.8.0_20/jre/bin/jjs
jre keytool /usr/lib/jvm/jdk1.8.0_20/jre/bin/keytool
jre orbd /usr/lib/jvm/jdk1.8.0_20/jre/bin/orbd
jre pack200 /usr/lib/jvm/jdk1.8.0_20/jre/bin/pack200
jre policytool /usr/lib/jvm/jdk1.8.0_20/jre/bin/policytool
jre rmid /usr/lib/jvm/jdk1.8.0_20/jre/bin/rmid
jre rmiregistry /usr/lib/jvm/jdk1.8.0_20/jre/bin/rmiregistry
jre servertool /usr/lib/jvm/jdk1.8.0_20/jre/bin/servertool
jre tnameserv /usr/lib/jvm/jdk1.8.0_20/jre/bin/tnameserv
jre unpack200 /usr/lib/jvm/jdk1.8.0_20/jre/bin/unpack200
jdk appletviewer /usr/lib/jvm/jdk1.8.0_20/bin/appletviewer
jdk ControlPanel /usr/lib/jvm/jdk1.8.0_20/bin/ControlPanel
jdk extcheck /usr/lib/jvm/jdk1.8.0_20/bin/extcheck
jdk idlj /usr/lib/jvm/jdk1.8.0_20/bin/idlj
jdk jar /usr/lib/jvm/jdk1.8.0_20/bin/jar
jdk jarsigner /usr/lib/jvm/jdk1.8.0_20/bin/jarsigner
jdk java /usr/lib/jvm/jdk1.8.0_20/bin/java
jdk javac /usr/lib/jvm/jdk1.8.0_20/bin/javac
jdk javadoc /usr/lib/jvm/jdk1.8.0_20/bin/javadoc
jdk javafxpackager /usr/lib/jvm/jdk1.8.0_20/bin/javafxpackager
jdk javah /usr/lib/jvm/jdk1.8.0_20/bin/javah
jdk javap /usr/lib/jvm/jdk1.8.0_20/bin/javap
jdk javapackager /usr/lib/jvm/jdk1.8.0_20/bin/javapackager
jdk java-rmi.cgi /usr/lib/jvm/jdk1.8.0_20/bin/java-rmi.cgi
jdk javaws /usr/lib/jvm/jdk1.8.0_20/bin/javaws
jdk jcmd /usr/lib/jvm/jdk1.8.0_20/bin/jcmd
jdk jconsole /usr/lib/jvm/jdk1.8.0_20/bin/jconsole
jdk jcontrol /usr/lib/jvm/jdk1.8.0_20/bin/jcontrol
jdk jdb /usr/lib/jvm/jdk1.8.0_20/bin/jdb
jdk jdeps /usr/lib/jvm/jdk1.8.0_20/bin/jdeps
jdk jhat /usr/lib/jvm/jdk1.8.0_20/bin/jhat
jdk jinfo /usr/lib/jvm/jdk1.8.0_20/bin/jinfo
jdk jjs /usr/lib/jvm/jdk1.8.0_20/bin/jjs
jdk jmap /usr/lib/jvm/jdk1.8.0_20/bin/jmap
jdk jmc /usr/lib/jvm/jdk1.8.0_20/bin/jmc
jdk jmc.ini /usr/lib/jvm/jdk1.8.0_20/bin/jmc.ini
jdk jps /usr/lib/jvm/jdk1.8.0_20/bin/jps
jdk jrunscript /usr/lib/jvm/jdk1.8.0_20/bin/jrunscript
jdk jsadebugd /usr/lib/jvm/jdk1.8.0_20/bin/jsadebugd
jdk jstack /usr/lib/jvm/jdk1.8.0_20/bin/jstack
jdk jstat /usr/lib/jvm/jdk1.8.0_20/bin/jstat
jdk jstatd /usr/lib/jvm/jdk1.8.0_20/bin/jstatd
jdk jvisualvm /usr/lib/jvm/jdk1.8.0_20/bin/jvisualvm
jdk keytool /usr/lib/jvm/jdk1.8.0_20/bin/keytool
jdk native2ascii /usr/lib/jvm/jdk1.8.0_20/bin/native2ascii
jdk orbd /usr/lib/jvm/jdk1.8.0_20/bin/orbd
jdk pack200 /usr/lib/jvm/jdk1.8.0_20/bin/pack200
jdk policytool /usr/lib/jvm/jdk1.8.0_20/bin/policytool
jdk rmic /usr/lib/jvm/jdk1.8.0_20/bin/rmic
jdk rmid /usr/lib/jvm/jdk1.8.0_20/bin/rmid
jdk rmiregistry /usr/lib/jvm/jdk1.8.0_20/bin/rmiregistry
jdk schemagen /usr/lib/jvm/jdk1.8.0_20/bin/schemagen
jdk serialver /usr/lib/jvm/jdk1.8.0_20/bin/serialver
jdk servertool /usr/lib/jvm/jdk1.8.0_20/bin/servertool
jdk tnameserv /usr/lib/jvm/jdk1.8.0_20/bin/tnameserv
jdk unpack200 /usr/lib/jvm/jdk1.8.0_20/bin/unpack200
jdk wsgen /usr/lib/jvm/jdk1.8.0_20/bin/wsgen
jdk wsimport /usr/lib/jvm/jdk1.8.0_20/bin/wsimport
jdk xjc /usr/lib/jvm/jdk1.8.0_20/bin/xjc

plugin xulrunner-1.9-javaplugin.so /usr/lib/jvm/jdk1.8.0_20/jre/lib/amd64/libnpjp2.so
plugin mozilla-javaplugin.so /usr/lib/jvm/jdk1.8.0_20/jre/lib/amd64/libnpjp2.so

The commands for update alternatives:

update-alternatives --quiet --install /usr/bin/policytool policytool /usr/lib/jvm/jdk1.8.0_20/jre/bin/policytool 100
update-alternatives --quiet --install /usr/bin/rmid rmid /usr/lib/jvm/jdk1.8.0_20/jre/bin/rmid 100
update-alternatives --quiet --install /usr/bin/unpack200 unpack200 /usr/lib/jvm/jdk1.8.0_20/jre/bin/unpack200 100
update-alternatives --quiet --install /usr/bin/appletviewer appletviewer /usr/lib/jvm/jdk1.8.0_20/bin/appletviewer 100
update-alternatives --quiet --install /usr/bin/ControlPanel ControlPanel /usr/lib/jvm/jdk1.8.0_20/bin/ControlPanel 100
update-alternatives --quiet --install /usr/bin/extcheck extcheck /usr/lib/jvm/jdk1.8.0_20/bin/extcheck 100
update-alternatives --quiet --install /usr/bin/idlj idlj /usr/lib/jvm/jdk1.8.0_20/bin/idlj 100
update-alternatives --quiet --install /usr/bin/jar jar /usr/lib/jvm/jdk1.8.0_20/bin/jar 100
update-alternatives --quiet --install /usr/bin/jarsigner jarsigner /usr/lib/jvm/jdk1.8.0_20/bin/jarsigner 100
update-alternatives --quiet --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0_20/bin/java 100
update-alternatives --quiet --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8.0_20/bin/javac 100
update-alternatives --quiet --install /usr/bin/javadoc javadoc /usr/lib/jvm/jdk1.8.0_20/bin/javadoc 100
update-alternatives --quiet --install /usr/bin/javafxpackager javafxpackager /usr/lib/jvm/jdk1.8.0_20/bin/javafxpackager 100
update-alternatives --quiet --install /usr/bin/javah javah /usr/lib/jvm/jdk1.8.0_20/bin/javah 100
update-alternatives --quiet --install /usr/bin/javap javap /usr/lib/jvm/jdk1.8.0_20/bin/javap 100
update-alternatives --quiet --install /usr/bin/javapackager javapackager /usr/lib/jvm/jdk1.8.0_20/bin/javapackager 100
update-alternatives --quiet --install /usr/bin/java-rmi.cgi java-rmi.cgi /usr/lib/jvm/jdk1.8.0_20/bin/java-rmi.cgi 100
update-alternatives --quiet --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.8.0_20/bin/javaws 100
update-alternatives --quiet --install /usr/bin/jcmd jcmd /usr/lib/jvm/jdk1.8.0_20/bin/jcmd 100
update-alternatives --quiet --install /usr/bin/jconsole jconsole /usr/lib/jvm/jdk1.8.0_20/bin/jconsole 100
update-alternatives --quiet --install /usr/bin/jcontrol jcontrol /usr/lib/jvm/jdk1.8.0_20/bin/jcontrol 100
update-alternatives --quiet --install /usr/bin/jdb jdb /usr/lib/jvm/jdk1.8.0_20/bin/jdb 100
update-alternatives --quiet --install /usr/bin/jdeps jdeps /usr/lib/jvm/jdk1.8.0_20/bin/jdeps 100
update-alternatives --quiet --install /usr/bin/jhat jhat /usr/lib/jvm/jdk1.8.0_20/bin/jhat 100
update-alternatives --quiet --install /usr/bin/jinfo jinfo /usr/lib/jvm/jdk1.8.0_20/bin/jinfo 100
update-alternatives --quiet --install /usr/bin/jjs jjs /usr/lib/jvm/jdk1.8.0_20/bin/jjs 100
update-alternatives --quiet --install /usr/bin/jmap jmap /usr/lib/jvm/jdk1.8.0_20/bin/jmap 100
update-alternatives --quiet --install /usr/bin/jmc jmc /usr/lib/jvm/jdk1.8.0_20/bin/jmc 100
update-alternatives --quiet --install /usr/bin/jps jps /usr/lib/jvm/jdk1.8.0_20/bin/jps 100
update-alternatives --quiet --install /usr/bin/jrunscript jrunscript /usr/lib/jvm/jdk1.8.0_20/bin/jrunscript 100
update-alternatives --quiet --install /usr/bin/jsadebugd jsadebugd /usr/lib/jvm/jdk1.8.0_20/bin/jsadebugd 100
update-alternatives --quiet --install /usr/bin/jstack jstack /usr/lib/jvm/jdk1.8.0_20/bin/jstack 100
update-alternatives --quiet --install /usr/bin/jstat jstat /usr/lib/jvm/jdk1.8.0_20/bin/jstat 100
update-alternatives --quiet --install /usr/bin/jstatd jstatd /usr/lib/jvm/jdk1.8.0_20/bin/jstatd 100
update-alternatives --quiet --install /usr/bin/jvisualvm jvisualvm /usr/lib/jvm/jdk1.8.0_20/bin/jvisualvm 100
update-alternatives --quiet --install /usr/bin/keytool keytool /usr/lib/jvm/jdk1.8.0_20/bin/keytool 100
update-alternatives --quiet --install /usr/bin/native2ascii native2ascii /usr/lib/jvm/jdk1.8.0_20/bin/native2ascii 100
update-alternatives --quiet --install /usr/bin/orbd orbd /usr/lib/jvm/jdk1.8.0_20/bin/orbd 100
update-alternatives --quiet --install /usr/bin/pack200 pack200 /usr/lib/jvm/jdk1.8.0_20/bin/pack200 100
update-alternatives --quiet --install /usr/bin/policytool policytool /usr/lib/jvm/jdk1.8.0_20/bin/policytool 100
update-alternatives --quiet --install /usr/bin/rmic rmic /usr/lib/jvm/jdk1.8.0_20/bin/rmic 100
update-alternatives --quiet --install /usr/bin/rmid rmid /usr/lib/jvm/jdk1.8.0_20/bin/rmid 100
update-alternatives --quiet --install /usr/bin/rmiregistry rmiregistry /usr/lib/jvm/jdk1.8.0_20/bin/rmiregistry 100
update-alternatives --quiet --install /usr/bin/schemagen schemagen /usr/lib/jvm/jdk1.8.0_20/bin/schemagen 100
update-alternatives --quiet --install /usr/bin/serialver serialver /usr/lib/jvm/jdk1.8.0_20/bin/serialver 100
update-alternatives --quiet --install /usr/bin/servertool servertool /usr/lib/jvm/jdk1.8.0_20/bin/servertool 100
update-alternatives --quiet --install /usr/bin/tnameserv tnameserv /usr/lib/jvm/jdk1.8.0_20/bin/tnameserv 100
update-alternatives --quiet --install /usr/bin/unpack200 unpack200 /usr/lib/jvm/jdk1.8.0_20/bin/unpack200 100
update-alternatives --quiet --install /usr/bin/wsgen wsgen /usr/lib/jvm/jdk1.8.0_20/bin/wsgen 100
update-alternatives --quiet --install /usr/bin/wsimport wsimport /usr/lib/jvm/jdk1.8.0_20/bin/wsimport 100
update-alternatives --quiet --install /usr/bin/xjc xjc /usr/lib/jvm/jdk1.8.0_20/bin/xjc 100

and don't forget the alljava.csh and alljava.sh (see java7onlinux)