Composition vs. Inheritance

Question

Hello again world.
I finally got around to buying Bruce Eckel's book Thinking in Java. After reading the chapter "Reusing Classes", I tried to write a program using both techniques just to see if it would compile:class  Building
   protected  boolean  isBrick;
   protected  boolean  isRoofPitched;
class  Window
   public  void  setTinted(boolean  isTinted) {}
class  Door
   public  void  open() {}
   public  void  close() {}
   protected  Window  window = new  Window();
public  class  House  extends  Building
   private  Window  windows[] = new  Window[12];
   private  Door  frontDoor;
   public  House()
      isBrick = false;
      isRoofPitched = true;
      frontDoor = new  Door();
      frontDoor.window.setTinted(true);
      windows[0] = new  Window();
      windows[0].setTinted(false);
      for (int  x = 0 ; x < 12 ; x++)
         windows[x] = new  Window();
   public  static  void  main(String[]  params)
      House  house = new  House();
      house.frontDoor.open();
      System.out.println("Welcome to your new home.");
      System.out.println("You may want to install some plumbing.");
}I would appreciate any comments or criticisms on how demonstrative my logic is.
Thank you one and all.
Ciao for now.

Answer 1

I think you have used inheritance and composition in a correct way. For example a House IS-A Building but a House HAS-A Window and it HAS-A Door etcetera.