Introduction to Software engineering Sixth chapter

Object-Oriented Fundamentals

The software biologist gives a formula: Object-oriented = object + Class + inherit + + + Communication If a software system uses these concepts to build a model and implement it, then he is an object-oriented one.

The basic object-oriented concept has 1 Objects 2 Class 3 package 4 inherit 5 message 6 correlate 7 aggregation 8 polymorphism. The basic concepts of software modeling are systems, models, and views. And the importance of software modeling.

Unified Modeling Language UML, he is composed of views, diagrams, model elements, public mechanisms and other components of UML to develop a series of semantic rules for building semantic consistency, good coordination with other models of good model

The main names, scopes, visibility, completeness, enforceability, etc. also introduce common UML diagrams, such as use case diagram, class diagram, sequence diagram, state diagram, etc., where the main relationship of use case diagram includes, expands, generalizes, class

The main relationships of graphs are related, aggregation, generalization, dependency and so on. Sequence diagrams are composed of objects, lifelines, control focus, messages, and so on. A state diagram is an extension of a state machine to describe an object's

The sequence of response events that are made to an external event.

Introduction to Software engineering Sixth chapter