How to switch between different Java (JVM) in Ubuntu and Debian GNU Linux

Sometimes its hard to avoid installing multiple Java Virtual Machines (JVM) on your computer because it has something to do with application compatibility or software development purposes.

This creates an annoyance when you just want to run one of the JVM instead of another for a specific task, then having to switch to another JVM for other tasks.

Here’s an easy way to setup a default JVM (Java interpreter and javac) and switch between several JVM in Ubuntu / Debian based distribution.

From the console execute

[code]
sudo update-alternatives --config java
[/code]

Then you’ll be presented with this menu,

jvmtn.jpg

Select the Java distribution which best suits you and press enter. You’re done. You can always change the default JVM for your Ubuntu/Debian distribution by repeating this steps.

[tags]java,jdk,j2sdk,ubuntu,debian,linux,jvm,vm,javac[/tags]

6 thoughts on “How to switch between different Java (JVM) in Ubuntu and Debian GNU Linux

  1. In fact that would only change the interpreter, not the compiler, creating a symlink from ¿/etc/alternatives/java? to the executable you selected.

    For the compiler you’d have to write:
    sudo update-alternatives –config javac

  2. Thank you! I am doing my first programming course and everything is windows orientated. ARGH! I have be having trouble practicing a home because they wanted me to use Textpad etc and it doesn’t seem to work in Wine. Now, I’m on my way! (yes, my program worked!

  3. Thank you that helped me a lot.

    But what is weird that launching the same eclipse version (which I copied from an other HDD) worked when beeing started on the original HDD in my current environment.

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