The Object Paradigm Classes – Templates for creating objects Includes Behaviors (methods) Includes Data (attributes) Object Paradigm

The Object Paradigm Objects – Instances of a class Defined from a class template Consumes memory Identified with a object reference Has a finite lifespan Object Paradigm

The Object Paradigm Encapsulation – How an object performs its duties is hidden from the outside world Methods can be used without the knowledge of the inner workings Inner workings can be modified without impacting use (as long as the interface is unchanged) Object Paradigm

The Object Paradigm Association – Relationship between two classes

The Object Paradigm Composition – Supports a “part-of” relationship

The Object Paradigm Aggregation – Whole/part relationship where the lifetimes of the whole and part are not necessarily bound together Composition – Whole/part relationship where the lifetimes of the whole and part are bound together Object Paradigm

The Object Paradigm Inheritance – Defines a “kind-of” relationship. Supports reusing common attributes and methods from a base class to derived classes. “Specialization” Object Paradigm

The Object Paradigm Abstract Classes Do not include implementation code sufficient to instantiate an object Used to define the common data and behavior of the derived classes Very powerful design & maintenance concept Object Paradigm

The Object Paradigm Interface – 100% abstract methods Derived classes must define behavior A class can inherit from many interfaces (pseudo multiple inheritance). Object Paradigm

The Object Paradigm Polymorphism – The ability of objects with the same inheritance to perform any given behavior differently Object Paradigm