24.7. Custom Annotations

Try these first

1. 1.

   What is an annotation?

   Hint

   Think about how they relate to classes and methods.

2. 2.

   Name one built-in annotation in Java.

   Hint

   Consider annotations that modify method behavior.

3. 3.

   What is a custom annotation in Java?

   • A built-in feature
   • User-defined metadata
   • An outdated method

   Hint

   Think about how you can create your own annotations.

4. 4.

   True or False: Annotations can affect the semantics of the program.

   • True
   • False

   Hint

   Consider what annotations actually do in your code.

5. 5.

   Define a custom annotation @Version that can be applied to classes to indicate the version of the class. It should have a String attribute for the version number.

   Hint

   Think about where the annotation can be applied and how it should be structured.

6. 6.

   Imagine you are developing a library management system. Create an annotation @Book that can be applied to methods that need to log book borrowing activity. Include fields for the user ID and book ID.

   Hint

   Consider method-level annotations and what information needs to be captured.