Configure Neovim for Java Development

In this video I go over how to configure Neovim for Java development using KickstartNvim, with nvim-jdtls and nvim-java (spoiler: I couldn't get this one to work for me). I also share my keymaps that you can use to organize imports and extract methods or extract variables.
Companion Article: levelup.gitconnected.com/conf...
My Neovim config: github.com/exosyphon/nvim
KickstartNvim: github.com/nvim-lua/kickstart...
java.lua config: github.com/exosyphon/nvim/blo...
Lombok issue: github.com/nvim-java/nvim-jav...
COC nvim for Java: • Setting up Neovim for ...
Install SDKMan: sdkman.io/
nvim-java: github.com/nvim-java/nvim-java
nvim-jdtls: github.com/mfussenegger/nvim-...
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⏰ Timestamps
0:00 Intro
1:22 Create example project
4:01 Install / Configure nvim-jdtls
8:21 Configure Lombok
12:34 Install / Configure nvim-java
14:54 Outro
#neovim #coding #java

[@ascourter]

I will update here once I get nvim-java working and what the fix was.

[@farzadmf]

I suggest to maybe post a follow-up video when that happens

[@ascourter]

@@JonathanMorrisMusic Oh good suggestion. Do you know offhand where the data directory is by default in nvim-java? I have been blowing away ~/.local/share/KickstartNvim but if it is outside that directory then this may be tripping me up.

[@JonathanMorrisMusic]

​@@ascourter I apparently must have been temporarily banned from posting on YT since I've been trying to reply to this message for the past day lol. Must be because I tried to post a bash command. Anyway, it's defined in the nvim-java/nvim-java-core plugin and resolves to either HOME/.cache/nvim/jdtls/workspaces/common-workspace or XDG_CACHE_HOME/nvim/jdtls/workspaces/common-workspace (removing the dollar signs from the variables in case I get flagged again somehow).

[@ascourter]

@@JonathanMorrisMusic Oh geez, I was wondering what happened to your messages when I looked for them. Crazy that you got a temporary ban. Thank you for your perseverance in posting the comment! I will check this and see if removing that cache gets this working for me. Thanks!

[@JonathanMorrisMusic]

@@ascourter No problem, sounds good!

[@jackedkarlmarx]

I had my java config already working, however it kept using 2 space indents because of format being enabled, thank you for this tutorial very helpful!

[@hyltoncarboo8303]

If you are using Google Java Format do: null_ls.builtins.formatting.google_java_format.with({ extra_args = {"-aosp"} })

[@obszczymucha1337]

This is gold. Thank you!

[@CodingWithAuryn]

Awesome video and overview, thank you :) Til now I used for Java intellij, but I prefer nvim so much So will switch also for Java now

[@ascourter]

Thanks for watching!

[@jagernet]

I love Java and Neovim so this is so nice

[@vikingthedude]

I don’t believe you

[@joels1469]

Thank god I found this!!! THANK YOU

[@antoninoadornetto6958]

Great video! Thank you

[@ivanmoya9115]

thanks, you really help fixed some issues.

[@ascourter]

Glad it helped!

[@ticler]

Does it work with project that use mapstruct or metal model generators?

[@ascourter]

Great question. I haven't tried a project with either of those yet

[@NicolasRuizX]

Hello, I'm using java 21 with springboot and I did exactly what you show for jdtls, and I get the error of "The blank final field may not have been initialized", where Intellij doesn't give me this error. Do you know something about it?

[@ascourter]

I haven't seen that one before. You might check this out: stackoverflow.com/questions/28129169/the-blank-final-field-may-not-have-been-initialized If that doesn't help then I'd open an issue on jdtls and see if someone there can help

[@NicolasRuizX]

@@ascourter Thanks, will do, because it's giving the error when injecting dependencies like this and using lombok it shouldn't happen

[@NicolasRuizX]

@@ascourter I tried nvim-java and worked like a charm, I didn't get any issues and I did exactly as you did. Thank you very much, good content :D

[@ascourter]

@@NicolasRuizX nice! I'm glad you got it working!

[@guglielmobartelloni]

did you try putting the "require" lines at the bottom of the kickstart config? For me it solved the issue

[@ascourter]

I put them right above the mason-lspconfig line, I'll try putting them at the very end and see if that gets it working. Thanks!

[@ascourter]

Ok, I placed them at the absolute end of the file but that didn't seem to work for me. :(

[@guglielmobartelloni]

@@ascourter tldr: put the require('java').setup() in the config function of nvim-java, put the require('lspconfig').jdtls.setup {} at the very bottom of the file. Edit: I posted a comment with a github link but I think it was filtered out

[@ascourter]

Thanks@@guglielmobartelloni , I'll give this a try today

[@ascourter]

@@guglielmobartelloniI updated my config but it still won't work for me. I am getting a different error. Here's the open issue I have on Github: github.com/nvim-java/nvim-java/issues/135

[@elliotalderson9517]

java-nvim works fine for me, i used it with gradle and maven

[@AndreLuisOS]

The only thing I don't know is how to update the project after adding a new dependency. Would you know?

[@elliotalderson9517]

@@AndreLuisOS i use gradle for this, i think you can do the same if you're using maven

[@cody_codes_youtube]

Yeah dude! How long you’ve been doing Java now? You seeing a lot of opportunity in the java space?

[@ascourter]

I think there's always opportunity in the Java space 😁

[@cody_codes_youtube]

@@ascourter that’s been a true statement for many decades. Haha

[@andreasmertz9677]

Im able to install Lombok as a dependency and make Neovim recognise Lombok, however I can't seem to use my Getter method

[@ascourter]

You might open an issue with the plugin and see if they can give you some guidance. Sorry it isn't working!

[@LuanLouzada]

and how do you automatically rename a file when changing a class?

[@ascourter]

I believe the LSP should handle this if you do an LSP rename (vim.lsp.buf.rename())

[@dougcarneiro]

Couldnt make jdtls recognize lombok. Followed the exact same steps from video but didnt work :/

[@ascourter]

That's no good! Try opening an issue on GitHub and see if they can get you fixed

[@dadinhoschannel4003]

Can you do it for c#?

[@ascourter]

I will add this to my list!

[@Rahim-444]

i still have a problem with having two lsp instances running at the same time one belongs mason and the other is from the lsp installed with lazy

[@ascourter]

Are you using your own config or LazyVim?

[@Rahim-444]

@@ascourter my own config

[@ascourter]

@@Rahim-444 is it two jdtls instances? You should only have one running so you'll have to drop one so you don't have collisions

[@Rahim-444]

@@ascourter how can i drop the mason one ? it has auto start on, the other one is the plugin one both are running at the same time

[@ascourter]

@@Rahim-444 if you remove it from your ensure_installed section then mason shouldn't auto install and you can uninstall it manually

[@CaptainDouchie]

i thought it was going to be the first up to date java config for neovim but it ended up not working too

[@ascourter]

Did you try getting the more manual approach working?

[@depreza68]

hello! i'm new on nvim rabbit hole, can this be done with packer?

[@ascourter]

Welcome! Of course, replace lazy.nvim with packer and the installation should be the same. I would recommend migrating to lazy.nvim though since packer is no longer maintained.

[@depreza68]

@@ascourter thx alot! been watching your videos for almost a half a week!

[@elliotalderson9517]

packer is deprecated now, even the developer of packer uses lazy, lazy is just better

[@mars_0008]

how about one neovim vid for Java's more modern and growing alternative - Kotlin?

[@ascourter]

Maybe something like this? kzbin.info/www/bejne/rGqXc2d4r6ijnrc

[@mars_0008]

@@ascourter dam my memory failed me. Thanks! I think I actually watched this. Is Flutter useable in Neovim? (Unlike Kotlin).

[@ascourter]

@@mars_0008 no worries. Hmmm I'm not sure about Flutter, I'm not sure off the top of my head.

[@KaiyuLee]

I like your kitty title bar style, can you share your config bro?

[@ascourter]

Here's my config that has my kitty conf file. The status bar you're talking about is from tmux. That config is under the tmux conf file. I went over setting up tmux in a previous video if that helps. github.com/exosyphon/dotfiles

[@KaiyuLee]

@@ascourter thanks 👍

[@123RogerioFerreira]

Maybe the issue is related to the paths used in your java.lua? Seems like you are using different share directories. Could you try changing '/.local/share/nvim' to '/.local/share/KickstartNvim'?

[@ascourter]

This is a good call-out. I believe I updated these correctly for Kickstart but will double check. Thanks!

[@medaliboulaamail6491]

the correct answer should have been sudo apt install intellij but cool vid

[@ascourter]

Ha. It would be nice if they allowed an embedded Neovim someday

[@medaliboulaamail6491]

@@ascourter it would be awesome if they open sourced there java plugin just like there rust plugin

[@errolloldham9995]

Promo_SM 😬

[@c1dk1n]

Step 1) Configure Neovim for Java Step 2) Cry, because Java still isn't fun, even in Neovim.

[@elliotalderson9517]

java is fun in neovim xd

[@c1dk1n]

@@elliotalderson9517 we all can't be masochistic

[@elliotalderson9517]

@@c1dk1n being masochist is funny i suppose

[@n3rd235]

dissapointing

[@ascourter]

Yep, still trying to figure this one out 😞

[@brianfarias7285]

Using gd does not take me to definitions I only get "[telescope.builtin.lsp_*]: server does not support definitionProvider" Also, autocomplete did not show "classUnderTest" Could somebody help?

[@ascourter]

Seems like the LSP is not connected or running. If you use :LspInfo do you see anything?

[@brianfarias7285]

@@ascourter It seems like at some point i messed up compl Here's the response i get from :LspInfo: Language client log: /home/brianvf/.local/state/nvim/lsp.log Detected filetype: java 2 client(s) attached to this buffer: Client: jdtls (id: 1, bufnr: [8]) filetypes: autostart: false root directory: /home/brianvf/coding/java cmd: /home/brianvf/.local/share/nvim/mason/bin/jdtls Client: jdtls (id: 2, bufnr: [8]) filetypes: java autostart: true root directory: /home/brianvf/coding/java cmd: /home/brianvf/.local/share/nvim/mason/bin/jdtls -configuration /home/brianvf/.cache/jdtls/config -data /home/brianvf/.cache/jdtls/workspace Configured servers list: jdtls, lua_ls, tsserver

[@brianfarias7285]

@@ascourter It shows me the following 2 client(s) attached to this buffer: Then I have jdtls twice. Guess I mesed up somehow

[@ascourter]

@@brianfarias7285 yeah, see if you can figure out why you have two instead of one

[@user-qs6js1zs9x]

Did you fix that? I have the same problem, 1 client is running