Just a note that for Macs, you don’t need to install `jenv` to manage Java versions. Just install the JDKs in the usual place: `/Library/Java/JavaVirtualMachines`. Then add these two very short functions. For bash:

# .bashrc
usejava() {
  export JAVA_HOME=`/usr/libexec/java_home -v $1`
}
alias jvms='/usr/libexec/java_home -V'

Or for fish:

# ~/.config/fish/function/usejava.fish
function usejava
  set -x JAVA_HOME (/usr/libexec/java_home -v $argv[1])
end
# ~/.conda/fish/config.fish
alias jvms '/usr/libexec/java_home -V'

Then in a terminal you can show which versions of java are available using jvms and select one using just its version number like usejava 11, usejava 1.8 or even usejava 1.8_222 if you need to get specific.