There is one theoretical method that mimics a "converter" functionality: Emulation Wrapper . A developer could write a "Java Runner" application in C/C++ for MRE (compiled as a VXP). This runner application could be designed to read a JAR file stored on the phone's SD card and interpret the bytecode.
Not all JAR files can be converted to VXP. VXP files are designed for the platform found on low-end "dumbphones". Complex Java applications may not have the necessary libraries or hardware support (like screen resolution or memory limits) to run on these devices even after conversion. jar to vxp converter online
“Aanya,” he said, smiling. “If you’re watching this, you found the key. The crash of 2008 wasn’t a failure. It was when I bought this shop for ₹5,000. Never trust the market. Trust what you build.” There is one theoretical method that mimics a
Converting (Java Archive) files to (Maui Runtime Environment) format is primarily done to run legacy Java applications on low-end feature phones Not all JAR files can be converted to VXP
Bringing Java Apps to Your Feature Phone: The JAR to VXP Guide