java lox scanner implementation

java/flake.nix

@@ -0,0 +1,29 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    {
+      nixpkgs,
+      flake-utils,
+      ...
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        buildInputs = with pkgs; [
+          jdk21
+          jdt-language-server
+          maven
+        ];
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = buildInputs;
+        };
+      }
+    );
+}