feat(java): Force formatting with null-ls (clang-format) for java projects

lua/plugins/languages/java.lua

@@ -18,6 +18,18 @@ return {
 			callback = function(ev)
 				if (ev.match == "java") then
 					require("jdtls").start_or_attach(opts)
+
+					local handler = function()
+						vim.lsp.buf.format({
+							async = true,
+							filter = function(client)
+								return client.name == "null-ls"
+							end,
+						})
+						vim.notify("Formatted with null-ls")
+					end
+
+					vim.keymap.set("n", "<leader>f", handler, { buffer = ev.buf })
 				end
 			end,
 		})