Trail: Learning the Java Language
Lesson: Classes and Objects
Questions and Exercises
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Questions and Exercises: Annotations


  1. What is wrong with the following interface?

    public interface House {
        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?

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