Convert .jar To .vxp Upd Fixed -

Converting .JAR to .VXP: The Ultimate Guide for 2026 If you're still rocking a classic feature phone like a Nokia S30+ (Nokia 225, 220, etc.) or an Alcatel device, you’ve likely realized that standard Java files (.jar) don't always run out of the box. These devices often rely on the MRE (MAUI Runtime Environment) platform, which uses the .vxp file format.

1. Extract the JAR (optional) – Some tools require unpacked classes:

   unzip game.jar -d game_src/
   

2. Create a manifest – Add a MANIFEST.MF or vxp.xml with:

   <vxp>
     <name>MyApp</name>
     <vendor>RetroDev</vendor>
     <version>1.0</version>
     <midlet-class>com.example.MyMIDlet</midlet-class>
   </vxp>
   

3. Run the packager – Bundle classes + resources into .vxp.
4. Sign (if required) – Some devices need a signature from a specific certificate.

converter = JARToVXPConverter() def convert_thread(): self.progress.start() try: output_path = Path(self.jar_path.get()).with_suffix('.vxp') package_id = self.converter.create_vxp_package( self.jar_path.get(), str(output_path), self.create_upd.get() )

The UPD 2026 Emulator: Use VRE_Emulator_Plus (a modified Wine wrapper for Linux/WSL2). Do not use the old WinXP emulator; it has different memory limits than modern feature phones. Convert .jar To .vxp UPD

self.extract_jar_info(jar_path)