A browser with JavaScript enabled is required for this page to operate properly.
Trail: Learning the Java Language
Lesson: Classes and Objects
Questions and Exercises
Home Page > Learning the Java Language > Classes and Objects

Questions and Exercises: Annotations

Questions

  1. What is wrong with the following interface?

    public interface House {
        @Deprecated
        void open();
        void openFrontDoor();
        void openBackDoor();
    }
    
  2. Consider this implementation of the House interface, shown in Question 1.

    public class MyHouse implements House {
        public void open() {}
        public void openFrontDoor() {}
        public void openBackDoor() {}
    }
    

    If you compile this program, the compiler complains that open has been deprecated (in the interface). What can you do to get rid of that warning?

Check your answers.

Problems with the examples? Try Compiling and Running the Examples: FAQs.
Complaints? Compliments? Suggestions? Give us your feedback.

Previous page: Annotations
Next page: Interfaces and Inheritance