How do i know if something is primitive type after autoboxing?

How do i know if something is primitive type after autoboxing?

I know there are a lot of quesitons about reflection and primitive types
already, but i didn't really get the exact information i searched. My
Problem is following: I want to invoke methods (through reflection)
completely dynamical, that means i want to invoke them even if i dont
exactly know the types of the parameters.
public Object invoke(Object objectContainingMethod,String methodName,
Object...params) {
Object result = null;
int length = params.length;
Class<?>[] paramTypes = new Class<?>[length];
for(int i=0; i<length; i++) {
paramTypes[i] = params[i].getClass();
}
try {
Method method =
objectContainingMethod.getClass().getMethod(methodName,
paramTypes);
// not hard coded like getMethod(methodName, String.class,
int.class, double.class);
result = method.invoke(objectContainingMethod, params);
} catch (NoSuchMethodException | SecurityException |
IllegalAccessException | IllegalArgumentException |
InvocationTargetException e) {
e.printStackTrace();
}
return result;
}
(Didn't optimized anything yet so pls don't hate^^) The problem is, the
parameter for the method need to be converted in Object but when i do this
you can't really detect anymore if it is a primitive type because of auto
boxing. Which happens when i try to call the Method "charAt" from the
class String with an int parameter:
String instance = "hello";
Object result = invoke(instance,"charAt",0);
which obviously results in:
java.lang.NoSuchMethodException: java.lang.String.charAt(java.lang.Integer)
at java.lang.Class.getMethod(Unknown Source)...
He searched for Integer instead of int because of auto-boxing. So is there
a work around for what i'm trying to do here? I know how to detect
primitive types, but not when they are auto-boxed to their wrapper types.
Any help is greatly appreciated.