Set Java version with update-alternatives

less than 1 minute read

Java runtime version can be switched without sudo as follows.

  1. (one-time) Setup your Bash shell to use ~/.local/bin instead of system-wide /usr
    mkdir ~/.local/bin
    

    Edit ~/.bashrc, adding the line:

    export PATH="$HOME/.local/bin:$PATH"
    
  2. (one-time setup) enable switching Java version, for example
    update-alternatives --install $HOME/.local/bin/java java /usr/lib/jvm/java-11-openjdk-amd64/bin/java*
     20
    update-alternatives --install $HOME/.local/bin/java java /usr/lib/jvm/java-10-openjdk-amd64/bin/java*
     10
    
  3. At any time, switch Java version:
    update-alternatives --config java
    

Leave a comment