Get autocomplete working, fix telescope settings, add java language server

ftplugin/java.lua

@@ -0,0 +1,5 @@
+local config = {
+	cmd = { "/home/aselimov/.local/share/nvim/mason/bin/jdtls" },
+	root_dir = vim.fs.dirname(vim.fs.find({ "gradlew", ".git", "mvnw" }, { upward = true })[1]),
+}
+require("jdtls").start_or_attach(config)

ftplugin/java.vim

@@ -1,2 +0,0 @@
-set colorcolumn=120
-set tw=120

init.lua

@@ -255,9 +255,9 @@ require("lazy").setup({
 				-- You can put your default mappings / updates / etc. in here
 				--  All the info you're looking for is in `:help telescope.setup()`
 				--
-				defaults = {
+				defaults = vim.tbl_extend("force", require("telescope.themes").get_ivy(), {
 					path_display = { "smart" },
-				},
+				}),
 			})
 
 			pcall(require("telescope").load_extension("live_grep_args"))
@@ -377,6 +377,7 @@ require("lazy").setup({
 			local servers = {
 				clangd = {},
 				-- gopls = {},
+				jdtls = {},
 				pyright = {},
 				rust_analyzer = {
 					settings = {
@@ -467,13 +468,34 @@ require("lazy").setup({
 		"hrsh7th/nvim-cmp",
 		event = "InsertEnter",
 		dependencies = {
+			-- Snippet Engine & its associated nvim-cmp source
+			{
+				"L3MON4D3/LuaSnip",
+				build = (function()
+					-- Build Step is needed for regex support in snippets
+					-- This step is not supported in many windows environments
+					-- Remove the below condition to re-enable on windows
+					if vim.fn.has("win32") == 1 or vim.fn.executable("make") == 0 then
+						return
+					end
+					return "make install_jsregexp"
+				end)(),
+			},
+			"saadparwaiz1/cmp_luasnip",
 			"hrsh7th/cmp-nvim-lsp",
 			"hrsh7th/cmp-path",
 		},
 		config = function()
 			-- See `:help cmp`
 			local cmp = require("cmp")
+			local luasnip = require("luasnip")
+			luasnip.config.setup({})
 			cmp.setup({
+				snippet = {
+					expand = function(args)
+						luasnip.lsp_expand(args.body)
+					end,
+				},
 				completion = { completeopt = "menu,menuone,noinsert" },
 
 				-- For an understanding of why these mappings were
@@ -496,6 +518,11 @@ require("lazy").setup({
 					--  completions whenever it has completion options available.
 					["<C-Space>"] = cmp.mapping.complete({}),
 				}),
+				sources = {
+					{ name = "nvim_lsp" },
+					{ name = "luasnip" },
+					{ name = "path" },
+				},
 			})
 		end,
 	},