A. public class X {  }     public class Y extends X { }
B. public interface Shape { }     public interface Rectangle extends Shape{ }
C. public interface Color { }     public class Shape { private Color color； }
D. public interface Species { }     public class Animal { private Species species； }
E. public class Person { }    public class Employee {      public Employee（Person person） { }
F. interface Component { }     class Container implements Component {   private Component[] children； }