I just updated my OH2 to snapshot #808 from #798 and just got this message within the update:
Oracle JDK 8 installed
#####Important########
To set Oracle JDK8 as default, install the "oracle-java8-set-default" package.
E.g.: sudo apt install oracle-java8-set-default
On Ubuntu systems, oracle-java8-set-default is most probably installed
automatically with this package.
######################
I am running oracle JDK8 already?
[08:25:03] pi@openHABian2:~$ java -version
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) Client VM (build 25.121-b13, mixed mode)
[08:28:03] pi@openHABian2:~$ dpkg -l
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=========================================-=========================-=========================-========================================================================================
(...)
ii oracle-java8-installer 8u121-1~webupd8~1 all Oracle Java(TM) Development Kit (JDK) 8
ii oracle-java8-jdk 8u65 armhf Java™ Platform, Standard Edition 8 Development Kit
ii oracle-java8-set-default 8u121-1~webupd8~1 all Set Oracle JDK 8 as default Java
(...)
So I guess, it’s just a default-message?