Protected Access

• Make CompoundShape.add method protected
• Protects HouseShape: other classes can't add graffiti
• Protected features can be accessed by subclass methods...
• ...and by methods in the same package
• Bad idea to make fields protected
  protected GeneralPath path; // DON'T
  
• Ok to make methods protected
  protected void add(Shape s) // GOOD
• Protected interface separate from public interface