Java layer

• Support for the following backends:
  • LSP Java client/server (default)
  • Meghanada client/server
• Auto-completion using company
• Linting using flycheck integration
• Maven integration
• Interactive debugger using dap-mode

To use this configuration layer, add it to your ~/.spacemacs. You will need to add java to the existing dotspacemacs-configuration-layers list in this file.

To choose a default backend set the layer variable java-backend:

(java :variables java-backend 'meghanada)

Alternatively the lsp backend will be automatically chosen if the layer lsp is used and you did not specify any value for java-backend.

Backend can be chosen on a per project basis using directory local variables (files named .dir-locals.el at the root of a project), an example to use the lsp backend:

;;; Directory Local Variables
;;; For more information see (info "(emacs) Directory Variables")

((java-mode (java-backend . lsp)))

Note: you can easily add a directory local variable with SPC f v d.

LSP Java is the Java adapter for LSP Mode which is the Emacs client for Language Server Protocol.

It integrates with company and flycheck. In addition it also provides full graphical debugging support via DAP mode.

LSP is the default backend used by this layer, see Choosing a backend in order to learn how to select a different backend.

Meghanada is composed of a lightweight server and an Emacs minor mode. It is unintrusive and integrates with company and flycheck.

Both Gradle and Maven projects are compatible with Meghanada.