Java in Neovim

Current State of Java + Neovim

Available:

• Treesitter highlighting
• Goto definition
• Goto references
• Formatting
• Diagnostics
• Hover
• Refactor/Rename
• Search files (FZF)
• Search text (FZF)
• Quickfix
• Lombok
• Configuration in coc-settings.json

Difficult to Implement:

• Debugging

* This can be done but in my opinion it's difficult to get setup, if you'd like to look further into it checkout the following:

• nvim-dap
• vimspector

Note

You will need to have CoC installed I have a blog post and video for installing CoC here:

YouTube Video

Blog Post

Install

Treesitter

You will need Neovim>=0.5

• Install with VimPlug

Plug 'nvim-treesitter/nvim-treesitter'

Add this to your init.vim

require'nvim-treesitter.configs'.setup { ensure_installed = "maintained", -- one of "all", "maintained" (parsers with maintainers), or a list of languages highlight = { enable = true, -- false will disable the whole extension }, }

coc-java

:CocInstall coc-java

Lombok

sudo mkdir /usr/local/share/lombok sudo wget https://projectlombok.org/downloads/lombok.jar -O /usr/local/share/lombok/lombok.jar

Commands

Here are a bunch of commands to get the behavior of this video:

<Plug>(coc-codeaction) " line action <Plug>(coc-definition) " definition <Plug>(coc-references) " references <Plug>(coc-type-definition) " type definition <Plug>(coc-rename) " rename <Plug>(coc-declaration) " declaration <Plug>(coc-implementation) " implementation <Plug>(coc-format) " format <Plug>(coc-fix-current) " quickfix <Plug>(coc-codelens-action) " code lens <Plug>(coc-diagnostic-next) " next diagnostic <Plug>(coc-diagnostic-next-error) " next error :CocList diagnostics " diagnostics :CocList outline " search outline :CocList -I symbols " references :CocUpdate " update CoC :CocDisable " disable CoC :CocEnable " enable CoC

Configuration

• coc-settings.json

// codelens "codeLens.enable": true, "java.referencesCodeLens.enabled": true, "java.jdt.ls.vmargs": "-javaagent:/usr/local/share/lombok/lombok.jar", // "java.jdt.ls.vmargs": "-javaagent:/usr/local/share/lombok/lombok.jar -Xbootclasspath/a:/usr/local/share/lombok/lombok.jar", // for older versions of Java

Repo Links

coc-java treesitter