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Object Modelling (CHAPTER 6) (object modeling with the unified language…
Object Modelling (CHAPTER 6)
Object-oriented Analysis
Method
Methods determine the behavior of a class. They are nothing more than an action that an object can perform.
Mesages
A message is a function or procedure call from one object to another. They are information sent to objects to trigger methods. Essentially, a message is a function or procedure call from one object to another.
Type of message
Black Box
Encapsulation
Polymorphism
.Attributes
describe information about the object
Classes
A class encapsulates the data and its behavior. Objects with similar meaning and purpose grouped together as class.
object-oriented terms and concepts
Methods
Attributes
Message
Class
Unified Modeling Language(UML)
Instance
Relationship Among Objects and Classes
Inheritance,child and parent
Object Relationship Diagram
Objects
An object is an encapsulation of data together with procedures that manipulate the data and functions that return information about the data. The procedures and functions are both called methods.
object modeling with the unified language
Unified Modeling Language (UML) is a general purpose modelling language. The main aim of UML is to define a standard way to visualize the way a system has been designed.
Use Case Modeling
Use Case Diagrams
Class Diagrams
class diagram in the class diagram in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, operations (or methods), and the relationships among objects.
sequence diagram
Sequence Diagrams are interaction diagrams that detail how operations are carried out. They capture the interaction between objects in the context of a collaboration. Sequence Diagrams are time focus and they show the order of the interaction visually by using the vertical axis of the diagram to represent time what messages are sent and when.
State Transition Diagram
State-transition diagrams describe all of the states that an object can have, the events under which an object changes state (transitions), the conditions that must be fulfilled before the transition will occur (guards), and the activities undertaken during the life of an object (actions)
Activity Diagrams
Activity Diagrams is use to illustrate the flow of control in a system and refer to the steps involved in the execution of a use case.
