Ask Your Question

How to obtain the value of an annotation by using reflection?

asked 2021-07-11 11:00:00 +0000

ladyg gravatar image

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

answered 2023-01-16 09:00:00 +0000

nofretete gravatar image

To obtain the value of an annotation by using reflection, follow these steps:

  1. Get the class object for the annotation type using Class.forName(String) method or the .class syntax. For example:
Class<MyAnnotation> annotationClass = MyAnnotation.class;
  1. Get the target element for which the annotation is present. This could be a class, method, field, parameter, etc. using appropriate reflection methods. For example:
Class<MyClass> targetClass = MyClass.class;
MyAnnotation annotation = targetClass.getAnnotation(MyAnnotation.class);
  1. Access the attribute value of the annotation using the appropriate method. For example:
String value = annotation.value();

Here, value() is the method defined in the MyAnnotation interface. Replace value() with the name of the appropriate method if the annotation has other attributes.

Note: If the target element is a method or a field, you may need to use additional reflection methods to get the annotations on the parameters or the generic type of the field or method.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss

Add Answer

Question Tools


Asked: 2021-07-11 11:00:00 +0000

Seen: 20 times

Last updated: Jan 16 '23