Can Not Install Jdk11 Using Update-Alternatives --Install
To Try out the New Features of Jdk11 I Installed It into /Opt/ and Want to Use It Using Update-Alternatives, Like So: Sudo Update-Alternatives --Install...
to try out the new features of jdk11 I installed it into /opt/ and want to use it using update-alternatives, like so:
sudo update-alternatives --install /etc/alternatives/java OpenJDK-11 /opt/jdk-11/bin/java 1102
which returns:
update-alternatives: using /opt/jdk-11/bin/javac to provide /etc/alternatives/java (OpenJDK-11) in auto mode
However, when I do
$ sudo update-alternatives --config java
I don't see the jdk I just installed. Instead I get a warning and the already existing choices:
update-alternatives: warning: /etc/alternatives/java has been changed (manually or by a script); switching to manual updates only
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1101 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1101 manual mode
2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode
What does the warning mean, and why is it in fact showing both auto and manual mode entries? And why is my jdk11 not in there?
1 Answer
Your first command was wrong, I think; it should have been:
sudo update-alternatives /usr/bin/java java /opt/jdk-11/bin/java 1102
and the same for all the others executables of the jdk.
how to do it
Install jdk-11
First install jdk-11 inside a directory in /usr/lib/jvm. We will use openjdk-11+28-amd64 here
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