Passport Status Tracking System - Class Diagram



Class Diagram

  • A class diagram is an illustration of the relationships and source code dependencies among classes in the Unified Modeling Language (UML).
  • In this context, a class defines the methods and variables in an object, which is a specific entity in a program or the unit of code representing that entity.
  • Class diagrams are useful in all forms of object-oriented programming (OOP).
  • The concept is several years old but has been refined as OOP modeling paradigms have evolved.
  • In a class diagram, the classes are arranged in groups that share common characteristics.
  • A class diagram resembles a flowchart in which classes are portrayed as boxes, each box having three rectangles inside.
  • The top rectangle contains the name of the class; the middle rectangle contains the attributes of the class; the lower rectangle contains the methods, also called operations, of the class.
  • Lines, which may have arrows at one or both ends, connect the boxes.
  • These lines define the relationships, also called associations, between the classes.
 class diagram fina year project

Class diagram

Benefits of class diagrams

  • You know exactly what you are getting.You will have lower development costs
  • Your software will behave as you expect it to Fewer surprises
  • The right decisions are made before you are given poorly written code. Less overall costs
  • We can develop more memory and processor efficient systems
  • System maintenance costs will be lower. Less relearning takes place
  • Working with a new developer will be easier.Communication with programmers and outside contractors will be more efficient

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