Convert Jar - To Vxp New

Let’s walk through a real example using the most reliable 2024 method:

Prerequisites:

Step 1: Clone the updated toolset

git clone https://github.com/brew-legacy/jar2vxp-modern.git
cd jar2vxp-modern

Step 2: Open config.ini – set OUTPUT_VXP_TYPE = BREW_31

Step 3: Place your snake.jar in ./input/ convert jar to vxp new

Step 4: Run the Python wrapper (replaces the old .exe)

python3 jar2vxp.py --jar snake.jar --name "Snake Classic"

Step 5: Output files – snake.vxp + snake.sig

Step 6: Transfer snake.vxp to phone via QPST or BitPim into brew/mod/ folder.
Step 7: On your phone, dial ##33284 (field test mode) → App Manager → Install new app → Select snake.vxp.

Result: The original J2ME Snake (2003) now runs natively as a BREW VXP on a Samsung SCH-A950. Let’s walk through a real example using the

The most famous tool historically was JarToVXP.exe, part of a hobbyist SDK. It worked by embedding the JAR inside a BREW shell that included a minimal Java VM. Unfortunately, the original tool is 32-bit and expects Java 1.3.

Not all JARs work. The app must:

Test with: java -jar mygame.jar (should show "MIDlet suite" info).

Short answer: Not 100%, but partially yes. Step 1: Clone the updated toolset git clone

There is no magical software that will take any JAR and output a working VXP. However, for simple J2ME games (no complex Java APIs like JSR-75 file access or Bluetooth), you can use a wrapper or recompile the source code.

The "new" approach in 2024 focuses on two real-world methods:

For most users, Method 1 is the only viable option.

New tools in 2024:

Example docker command:

docker run -v $PWD:/project brew-sdk:latest make -f brew_jar_conv.mk

This yields a native VXP comparable to commercial BREW games from 2007.