Why a method isn't implemented?

Question

Compiler complains that getName() isn't implemented by F1 and F2.
interface I {
     String getName();
     int getValue();
abstract class Abstract {
     String name;
     Abstract(String name) { this.name = name; }
class Final extends Abstract {
     Final(String name) { super(name); }
     class F1 implements I {
          public int getValue() { return 1; }
                // actuall F1 contains getName()
          String get() { return getName(); }
     class F2 implements I {
          public int getValue() { return 2; }
}The F1 class actually implements getName() method. Is it compiler's bug?

Answer 1

Thanks,
Now I've realized the problem but if I extend both F1 and F2 with Fianl I'll get different names. If I'm correct, I must use delegation in Java:
interface I {
     String getName();
     int getValue();
class Final {
     String name;
     public String getName() { return name; }
     Final(String name) { this.name = name; }
     class F1 implements I {
          public int getValue() { return 1; }
          public String getName() { return Final.this.getName(); }
     private final I f1 = new F1();
}Orthogonality is curious statement, but nested classes are junktion points, aren't they? getName() method is in the scope of all nested classes and their descedants and I thought that it could be accessed without any delegation.