Android Question Use 3rd Party Jar with class

I have an external library that i managed to utilise using javaobject. I would now like to move the code to a class for reusability but i am getting the error java.lang.ClassNotFoundException: Invalid name: null, serviceman=(main) b4a$feitianprint$main@976cc1, starter=null i think this is because the class cannot access the jar i tried adding #additional jar at the top of the class but the IDE says attribute not supported. Any help ?
 
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