nvim-jdtls VS nvim-cmp

I recommend that you do not configure jdtls like the other language servers, it is better to use the nvim-jdtls plugin.

Java is actually pretty good with Neovim, jdtls and this plugin. One of the best language servers and I'm using it on a regular base with medium to large projects, mostly spring-based. No Android though.

-- See `:help vim.lsp.start_client` for an overview of the supported `config` options. local config = { -- The command that starts the language server -- See: https://github.com/eclipse/eclipse.jdt.ls#running-from-the-command-line cmd = { -- 💀 'java', -- or '/path/to/java17_or_newer/bin/java' -- depends on if `java` is in your $PATH env variable and if it points to the right version. '-Declipse.application=org.eclipse.jdt.ls.core.id1', '-Dosgi.bundles.defaultStartLevel=4', '-Declipse.product=org.eclipse.jdt.ls.core.product', '-Dlog.protocol=true', '-Dlog.level=ALL', '-Xmx1g', '--add-modules=ALL-SYSTEM', '--add-opens', 'java.base/java.util=ALL-UNNAMED', '--add-opens', 'java.base/java.lang=ALL-UNNAMED', -- 💀 '-jar', '~/.local/share/nvim/mason/packages/jdtls/plugins/org.eclipse.equinox.launcher_1.6.500.v20230717-2134.jar', -- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^ -- Must point to the Change this to -- eclipse.jdt.ls installation the actual version -- 💀 '-configuration', '~/.local/share/nvim/mason/packages/jdtls/config_linux', -- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^ -- Must point to the Change to one of `linux`, `win` or `mac` -- eclipse.jdt.ls installation Depending on your system. -- 💀 -- See `data directory configuration` section in the README '-data', '/path/to/unique/per/project/workspace/folder' }, -- 💀 -- This is the default if not provided, you can remove it. Or adjust as needed. -- One dedicated LSP server & client will be started per unique root_dir root_dir = require('jdtls.setup').find_root({'.git', 'mvnw', 'gradlew'}), -- Here you can configure eclipse.jdt.ls specific settings -- See https://github.com/eclipse/eclipse.jdt.ls/wiki/Running-the-JAVA-LS-server-from-the-command-line#initialize-request -- for a list of options settings = { java = { } }, -- Language server `initializationOptions` -- You need to extend the `bundles` with paths to jar files -- if you want to use additional eclipse.jdt.ls plugins. -- -- See https://github.com/mfussenegger/nvim-jdtls#java-debug-installation -- -- If you don't plan on using the debugger or other eclipse.jdt.ls plugins you can remove this init_options = { bundles = {} }, } -- This starts a new client & server, -- or attaches to an existing client & server depending on the `root_dir`. require('jdtls').start_or_attach(config)

I can get by with https://github.com/mfussenegger/nvim-jdtls

This and this provided no viable solutions for me

I tried to configure jdtls for my NeoVim I followed https://github.com/mfussenegger/nvim-jdtls install instruction. and I faced this error does anyone successfully configured jdtls ? help T ^ T

Am I adding it to the wrong configuration option? Some places I see it added as a referencedLibary - https://github.com/mfussenegger/nvim-jdtls

Sure. Any server that lspconfig supports will work. But for java development is better if you use nvim-jdtls. The documentation in lsp-zero has a guide on how to setup nvim-jdtls.

Here' my java.lua for nvim-jdtls which solves the nil issue and add more features.

vim.api.nvim_set_hl(0, "PmenuSel", { bg = c.background_light, fg = "NONE" }) vim.api.nvim_set_hl(0, "Pmenu", { fg = c.foreground, bg = c.background_light }) vim.api.nvim_set_hl(0, "CmpItemAbbrDeprecated", { fg = c.foreground_light, bg = "NONE", strikethrough = true }) vim.api.nvim_set_hl(0, "CmpItemAbbrMatch", { fg = c.blue , bg = "NONE", bold = true }) vim.api.nvim_set_hl(0, "CmpItemAbbrMatchFuzzy", { fg = c.blue, bg = "NONE", bold = true }) vim.api.nvim_set_hl(0, "CmpItemMenu", { fg = c.purple, bg = "NONE", italic = true }) vim.api.nvim_set_hl(0, "CmpItemKindField", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindProperty", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindEvent", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindText", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindEnum", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindKeyword", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindConstant", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindConstructor", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindReference", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindFunction", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindStruct", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindClass", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindModule", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindOperator", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindVariable", { fg = c.foreground }) vim.api.nvim_set_hl(0, "CmpItemKindFile", { fg = c.foreground }) vim.api.nvim_set_hl(0, "CmpItemKindUnit", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindSnippet", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindFolder", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindMethod", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindValue", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindEnumMember", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindInterface", { fg = c.aqua }) vim.api.nvim_set_hl(0, "CmpItemKindColor", { fg = c.aqua }) vim.api.nvim_set_hl(0, "CmpItemKindTypeParameter", { fg = c.aqua }) -- https://github.com/hrsh7th/nvim-cmp/pull/1689 vim.api.nvim_set_hl(0, 'FloatBorder', { fg = c.background_light, bg = c.background_light })

Doing a fast scan on the commit history this is probably related to https://github.com/hrsh7th/nvim-cmp/pull/1689 . Hope it helps.

https://github.com/hrsh7th/nvim-cmp This is an autocompletion engine https://github.com/nvim-treesitter/nvim-treesitter This allows NeoVim to install parsing scripts so NeoVim can do things like code highlighting. https://github.com/williamboman/mason.nvim Not strictly necessary, but allows you to access a repo of LSP, install them, and configure them for without you actively messing about in config files. https://github.com/neovim/nvim-lspconfig Also not strictly necessary, but vastly simplifies LSP setup. https://github.com/williamboman/mason-lspconfig.nvim This lets the above two plugins talk to each other more easily.

Edit: Solved I only had to do this

toggling sources by Treesitter context

But today I'm a different person, and I'm sure that this is the right decision. I already gave a spiel on the cmp PR, but lemme copy-paste my response for those that weren't following the issue or don't check their GitHub notifications:

EDIT: I was able to reproduce the issue with a simplified nvim-cmp init.vim - posted here: https://github.com/hrsh7th/nvim-cmp/issues/1728

You need to add nvim-cmp and cmp-nvim-lsp

one thing that always annoyed me is how the autocomplete window behaves. when the space below your current line isn't sufficient it just teleports above the line. i know you can set a custom menu direction but i'd much rather have it pop up in a consistent place that is below the current line. the other behavior i dislike is the sizing. it's as big as the longest function in the list which can make the window enormous, to the point where there's almost no place left for the docs window. there aren't really any docs in the example below but i imagine with the little space that is left it'll get troublesome for more verbose docs such as with rust. i'd like to somehow tell nvim-cmp to always pop up below the current line, no matter how long the list is and possibly limit the horizontal size. is that at all possible? i've looked through the nvim-cmp wiki but haven't found an adequate solution. does this go beyond nvim-cmp?

Update: This isn't currently supported by nvim-cmp (and in fact it has been a feature request for a bit) and so I did my best and opened a PR that implements it :)