class A { 
   A  
  
  public A() { body = new BodyOfA(this); }
  protected A(int x) {   }
  
  public void f1() { body.f1(); }
  public void f2() { body.f2(); }
  public void f3() { System.out.println("A.f3"); }
  
  private A body;
  };