RFE: document how to set JAVA_HOME

[langdon]

JAVA_HOME does not appear to be set by the rpm package installation of java-11-openjdk-devel. I can set it by hand but I think it would be great if the java page could recommend the best way (in particular, accounting for the alternatives setup).

PS: If I knew the best way, I would file a PR :(

[pvalena]

@SMadani, @msrb any ideas / notes here?

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You mean something equivalent to what we have in Go page, right?

$ echo 'export GOPATH=$HOME/go' >> $HOME/.bashrc
$ source $HOME/.bashrc

It would be good to be consisten with this across the all pages. IMO would be best to set ENVs in .bash_profile instead(corresponding issue).

[SMadani]

I think the safest recommendation is as @pvalena suggests:

$ echo 'export JAVA_HOME=/usr/lib/jvm/java' >> ~/.bashrc
$ source ~/.bashrc

and if the user doesn't set alternatives, then the above should be java-11 instead of java.