ReflectionUtils.doWithFields()

Spring has a nice Utility class ReflectionUtils that does just that: it defines a method to loop over all fields of all super classes with a callback: ReflectionUtils.doWithFields()

Documentation:

Invoke the given callback on all fields in the target class, going up the class hierarchy to get all declared fields.

Parameters:
- clazz - the target class to analyze

- fc - the callback to invoke for each field

- ff - the filter that determines the fields to apply the callback to

Sample Code:

Output:

Found field private int java.util.ArrayList.size in type class java.util.ArrayList