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

Question

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 openjd

Answer 1

If you install openjdk 8 in docker. Maybe you need to install "software-properties-common"

apt-get update && apt-get install apt-file -y && apt-file update && apt-get install software-properties-common

And then you install openjdk 8 and setup update-alternatives with end number = 3

sudo apt-get install openjdk-8-jdk
export JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"

update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java" 3
update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/java-8-openjdk-amd64/bin/javac" 3