UNIT1_OOAD

ZIONI YENEPOYA (DEEMED TO BE UNIVERSITY) YENEPOYA Online.

[Audio] IntroductiontoObjectOrientation Modeling Unit1.

[Audio] Introduction: The process of planning and defining how the model's code would appear is known as object oriented modelling. The modelling approaches are implemented during the building or programming phases using a language that supports the object-oriented programming model. Used extensively in software engineering and system design..

[Audio] Object Oriented Modeling OOM is a three-phase process that involves gradually building object representations: Analysis, Design and Implementation. The model produced is . As the model develops, the focus moves from knowing how the system will be built to understanding how it should work..

[Audio] Object-Oriented Development An object-oriented system is designed for cooperating interconnected objects that keep track of their own state and perform actions on it. The state's representation is private and cannot be accessed thus object publicly. Objects are formed based on the definition of an object class. Both object type specification and a template for forming objects are included in an object class declaration. It contains declarations of all of the properties and operations that related to the class object..

[Audio] Object-Oriented Development Cont.. Object-oriented design methods entail the creation of object classes as well as the relationships between them. The objects as well as their relationship are well-defined by these classes..

[Audio] Object-Oriented Development Cont.. Object-oriented analysis: In object-oriented analysis, the system requirements are analysed and fixed. Also, the classes are recognised and the relationships among them are also recognised. Object-oriented design: In object-oriented design, the object-oriented model of a software system is developed to implement the recognised system requirements. Object-oriented programming: In object-oriented programming, the object-oriented programming language, such as java and C++ are used to design a software..

[Audio] Object-Oriented Development Cont.. System Design: The development teams come up with ahigh-level strategy for tackling the application challenge called the System Architecture. The system designer must identify which performance characteristics to improve, develop a problem-solving approach and establish preliminary resource allocations. Class Design: In accordance with the system design approach, the class designer adds information to the analysis model. His main concentration is on the data structures and techniques that each class requires. Implementation: By creating models, the analyst scrutinises and thoroughly restates the requirements from the system idea. The analysis model is a succinct, accurate representation of what the intended system must do, rather than how it will be accomplished..

[Audio] History of Object-Oriented Modeling 1960s: Introduction of Simula, the first object-oriented language. 1970s–1980s: Popularization with Smalltalk and C++. 1990s: UML (Unified Modeling Language) becomes a standard. Today: OOM is a fundamental approach in software engineering..

[Audio] Object-Oriented Themes Abstraction: Focusing on essential qualities rather than specific details. Encapsulation and data hiding: Bundling data with methods. Combining data and behavior: By merging data attributes and behavioural features of an object, the issue of calling code for data execution and operations independently can be reduced. Sharing: Object-oriented technology encourage collaboration on a variety of levels. Subclasses can share this code by inheriting data structure as well as behavior..

[Audio] Object-Oriented Themes Emphasis on the essence of object: Object-oriented technology focuses on the characteristics of an object rather than how the object will be used. Synergy: Object Oriented languages are characterized by their identity, classification, polymorphism, and inheritance Modularity: Dividing the system into smaller manageable parts. Hierarchy: Organizing objects in a structure (inheritance)..

[Audio] MODELING AS DESIGN TECHNIQUE Modeling: Creating a representation of a system to understand and design it. Why Modeling? Helps visualize system structure and behavior. Reduces misunderstandings between developers and stakeholders. Example: Creating a UML class diagram for an E-Commerce System..