interface A
{
  char a='A';
  void showa( );
}
interface B extends A
{
  char b='B';
  void showb( );
}
interface C
{
  char c='C';
  void showc( );
}
interface D extends B,C
{
  char d='D';
  void showd( );
}
class E implements D
{
  char e='E';
  public void showa( ){System.out.println("這里是接口"+a);}
  public void showb( ){System.out.println("這里是接口"+b);}
  public void showc( ){System.out.println("這里是接口"+c);}
  public void showd( ){System.out.println("這里是接口"+d);}
  public void showe( ){System.out.println("這里是類"+e);}
}
class InterfaceTest1
{
  public static void main(String args[ ])
  {
    E e=new E( );
    e.showa( );
    e.showb( );
    e.showc( );
    e.showd( );
    e.showe( );
  }
}