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

2. 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

3. 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

4. The Object Paradigm Association – Relationship between two classes

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

6. 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

7. 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

8. 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

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

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