24.6. Built-in Java Annotations

Try these first

1. 1.

   What does the @Override annotation do?

   Hint

   Think about method inheritance.

2. 2.

   What is the use of @Deprecated?

   Hint

   Consider methods that should not be used anymore.

3. 3.

   What does the @Override annotation indicate?

   • It marks a method as deprecated.
   • It signifies a method overrides a superclass method.
   • It suppresses warnings.

   Hint

   Think about what happens during method inheritance.

4. 4.

   Is the @Deprecated annotation used to mark methods that shouldn’t be used anymore?

   • True
   • False

   Hint

   Consider methods that have been replaced.

5. 5.

   Given a class with multiple methods marked as @Deprecated, how would you approach refactoring the code to avoid using those methods?

   Hint

   Look for documentation on preferred methods.

6. 6.

   Implement a functional interface using @FunctionalInterface and demonstrate its usage with a lambda expression.

   Hint

   Remember the rules of lambda syntax.