Object-oriented programming in Java

PlanI Encapsulation 1) Encpasulation 2 Objects 2.1 Instantiation 2.2 Sending messages 2.3 Building an encapsulation 3) Classes 3.1 Packaging 3.2 Concrete class 3.3 One-to-one link between classes 3.4 Varible and Class methodII Object substitution 5 Object subsitution or plolymorphism 5.1 Type/subtype relationship (one-to-one link) 5.2 Polymorphism. 6 Class hierarchy 6.1 Inheritance 6.2 Inheritance of interfaces 6.3 Inheritance between classes 6.4 Redefining instance methods 6.5 Abastraite classes 6.6 Multiple inheritance and choice of inherited members