rachana rachana - 2 months ago 17
Java Question

update-alternatives: warning: /etc/alternatives/java is dangling

I am facing the problem while running the java program from command line.
I have openjdk-6-jdk installed in my linux system and still shows the error relates with the openjdk-7-jdk.

Initially i have jdk 7 installed in my system but ater i have removes it but still facing problem while running the application.

after running the cammand

sudo update-alternatives --config java


it shows warning as follows

update-alternatives:
warning: /etc/alternatives/java is dangling,
it will be updated with best choice.

There is only one alternative in link group java:
/usr/lib/jvm/java-7-openjdk/jre/bin/java

Nothing to configure.

what should I do?

Answer

Assuming you installed the OpenJDK6 with:

sudo apt-get install openjdk-6-jdk

In Ubuntu 64 bit, make sure the paths are valid for your installation (change if using 32bit version):

/usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java

/usr/lib/jvm/java-6-openjdk-amd64/bin/javac

Setup update-alternatives:

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/java-6-openjdk-amd64/bin/javac" 1

sudo update-alternatives --set java /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java
sudo update-alternatives --set javac /usr/lib/jvm/java-6-openjdk-amd64/bin/javac

Alternatively, make sure the correct version is checked for both Java and compiler:

sudo update-alternatives --config java
sudo update-alternatives --config javac

List the installed Java alternatives with:

sudo update-alternatives --list java
sudo update-alternatives --list javac
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