Java reflection: how to get field value from an object, not knowing its class

Question

Say, I have a method that returns a custom List with some objects. They are returned as Object to me. I need to get value of a certain field from t

Answer 1

I strongly recommend using Java generics to specify what type of object is in that List, ie. List. If you have Cars and Trucks you can use a common superclass/interface like this List.

However, you can use Spring's ReflectionUtils to make fields accessible, even if they are private like the below runnable example:

List