I used Eclim (https://github.com/emacs-eclim/emacs-eclim https://github.com/emacs-eclim/emacs-eclim) for a bit, but I'm guessing, like the sibling comment said,

I used Eclim (https://github.com/emacs-eclim/emacs-eclim https://github.com/emacs-eclim/emacs-eclim) for a bit, but I'm guessing, like the sibling comment said, that the current preferred solution would be to use LSP.