Choosing a Java Version on Ubuntu
When you have got multiple versions of Java installed, you can choose which one you want to use by running the
Running this command shows a list of installed Java JDKs and JREs allowing one to be selected as the default that is used when java needs to be executed.
sudo update-alternatives --config javac
If you prefer to use a gui instead of the command line, you can execute
galternatives instead and define the default versions of software with the following dialog.
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