Working with Java from Emacs within Leiningen project

Question

There's plenty of closely related questions on SO, just to name some of them:

• Java and Clojure with Leiningen
• What is the best way to do Java development in Emacs?
• Best java tools for emacs

The difference of my questions is that I want to know how to make working with Java as easy as with Clojure right from Emacs within mixed Clojure/Java Leiningen project.

What I mean is possibility to (in order of priority):

• compile Java code right from Emacs (note: it is possible to compile it from the shell with lein javac)
• use code completion for Java (tools like JDEE provide this feature, but it is separate tool that doesn't concern Leiningen project setup)
• debug Java code

Answer 1

Check out the Emacs LSP project. It provides support for Java.