The @Override annotation behaviour

Question

Hello!
Why does the @Override annotation work with abstract methods and doesn's work with interface methods?
For example:
public abstract class Base {
  abstract public void foo();
public class Child extends Base {
  @Override public void foo() { } // OK
public interface Interface {
  void foo();
public class Implementation implements Interface {
  @Override public void foo() { } // ERROR: method does not override a method from its superclass
}Thanks you!

Answer 1

I am not sure what you mean by doesn't work, but ...
In the J2SE 1.5.0 documentation
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Override.html
Indicates that a method declaration is intended to override a method declaration in a
superclass. If a method is annotated with this annotation type but does not override a
superclass method, compilers are required to generate an error message.This specifically states that this is used to require the compiler to generate an error message when the annotated method does not override a superclass method.
Interfaces are not superclasses. In your example, the superclass of class Implementation is Object, not Interface.
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