Question

I searched for examples which may answer my question, but can’t find any useful or complete ones.

Answer 1

No, you don’t.

The following lines give you all the annotation information for a Class. Similarly you can use it for Method and Field objects

Annotation[] annotations = someObject.getClass().getAnnotations();
YourAnnotation annotation = 
     someObject.getClass().getAnnotation(YourAnnotation.class);
boolean annotationPresent = 
     someObject.getClass().isAnnotationPresent(YourAnnotation.class);