A: Possibly, but VR VXP files use 3D acceleration (OpenGL ES). J2ME jars do not have 3D code. The conversion will crash.
Web-based converters are useful for quick tasks without installing software, though success rates vary based on application complexity. Convert .jar To .vxp
Converting a is typically done to run Java applications on older feature phones or "dumbphones" that use the Mobile Runtime Environment (MRE) or Mediatek platforms. Google Groups Summary of Methods A: Possibly, but VR VXP files use 3D
If you must proceed, search GitHub for "VXPacker" or visit the Chinese Mobile Development Forum (需要翻墙). Good luck, and may your legacy apps live on. Convert .jar To .vxp