JavaCard OS

Hi everyone! I want to use native java method in java card. I was also told that it's impossible. There isn't any feasible methods to implement this, is there?

You can't do that. If you have to implement this function, tell your card VM provider, he can implement the native function, and provide the API to call the native function.

AIK, native methods for javacards can't be written by javacard users, only by the Card OS manufacturer.