Converting a JAR file to a VXP format is primarily done to allow Java-based apps or games to run on older feature phones (often called "dumbphones") that use the MRE (Maui Runtime Environment) platform . How to Convert JAR to VXP
However, you can achieve this using specialized developer tools or manual patching: 1. The Patching Method (For Running on Devices) convert jar to vxp link
To get a VXP file from a JAR, you must run the JAR through a MIDP (Mobile Information Device Profile) to BREW bridge. The only reliable tool for this is the legacy combined with a custom script. Converting a JAR file to a VXP format