How to find out if a field is instanceof a type via reflection?

Question

I want to find out via reflection if a field is an instance of some type T.

Lets say I have an object o. Now I want to know if it has any

Answer 1

In case of NullPointerException, you can use org.springframework.util.TypeUtils#isAssignable(java.lang.reflect.Type, java.lang.reflect.Type) instead of java.lang.Class#isAssignableFrom