Why do I get “object is not an instance of declaring class” when invoking a method using reflection?

Question

public class Shared {

    public static void main(String arg[]) throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, I         


        

Answer 1

 testParamMethod.invoke("", obj); ///// here getting error

The first parameter to invoke must be the object to invoke it on:

 testParamMethod.invoke(s1, "", obj);