A UML class diagram is used to represent, explain, and document the parts (classes) of an online shopping cart. It can also be a reference or way to create executable software code.
Class diagrams provide an overview of the shopping cart’s classes, functions, and relationships.
Project Overview
| Name: | Online Shopping Cart Class Diagram |
| UML Diagram: | Class Diagram |
| Users: | Online Sellers, Admin, and Online Customers. |
| Tools Used: | Any Diagram tools that provide use case diagram symbols. |
| Designer: | ITSourceCode.com |
What is Online Shopping Cart?
The online shopping cart is a function present in e-commerce or online shopping. It allows online shoppers to store their wanted products in the cart and order them if they want. This shopping cart works just like carts that we use when shopping physically.
Additionally, an online shopping cart gives convenience to the customers. It also enables them to have their wishlist and order them when they need the item or they want to. In conclusion, the shopping cart is a very useful function.
What is a Class Diagram?
The UML class diagram for shopping cart is crucial and useful for its development. This is because these are very effective in showing the shopping cart’s structure in detail, including the structures of each class. This works best with other Online Shopping Cart UML Diagrams.
Additionally, the class diagram blueprints show how things in the system work and are related. It also shows the system’s activities and the services it provides. Therefore, a class diagram defines the physical components of an online shopping cart and can directly relate to object-oriented languages.
Online Shopping Cart Class Diagram
This simple class diagram gives you the exact details about the shopping cart’s class characteristics and methods. It also clarifies the connections of classes in the function.
Here, I will be showing you the sample constructed class diagram provided with its attributes and methods. This is constructed with the simple idea derived from the common function of online shopping.
The illustration shows a simple idea of how the class diagram works. It resembles a flowchart in which classes are in boxes with three rectangles in each. The top rectangle has the class’s name; the middle holds the class’s properties, and the bottom contains the class’s methods.
The classes identified for Online Shopping Cart were the admin, seller, customer, users, transactions, payment, and delivery. Their roles are in the middle part and called their attributes. The function of each class is in its’ methods.
You can edit this diagram and it is up to you how will you create your class diagram. However, you need to be precise with your information and consider the decisions included.
Downloadable Pdf File
How to Draw a Class Diagram?
Time needed: 5 minutes
Steps in creating Class Diagram for Online Shopping Cart.
- Step 1: Familiarize Class Diagram Components
Class Diagram Components are used to create class diagrams. They should be familiarized before you build the class diagram.
To plot the class diagram you will need the class name, its attributes, methods, and their access (visibility). You will base the diagram on the evaluated information to have the exact Class Diagram.
- Step 2: Determine the targeted users
Classes are the main part of the diagram and it is presented in a box with three main partitions. It should be declared properly because it could be converted to codes.
- Step 3: Analyze the activities included
Attributes of a class should be placed in the middle part of a class. They were then assigned visibility symbols. This visibility has something to do with the codes.
The operations will be placed at the bottom of a class and represent the functions of a class within the shopping cart.
- Step 4: Plot the Class Diagram
To map the relationship between the classes, you also need to know the meaning of the symbols at the end of each line that connects them. The ends represent different meanings and relations between two or more classes.
Conclusion
The class diagram is a modeled diagram that explains shopping cart’s classes and relationships. It can depict the names and attributes of classes, as well as their links and methods that make up the software.
Moreover, the class diagram is the most essential type of UML diagram and is critical in software development. It is an approach to showing the shopping cart’s structure in detail and part by part.
Related Article:
- Online Shopping Cart UML Diagram | UML Diagrams
- Class Diagram for Online Shopping System
- Deployment Diagram for Online Shopping Cart | UML
- Sequence Diagram for Online Shopping Cart
- Use Case Diagram for Online Shopping Cart
- Component Diagram for Online Shopping Cart
- Shopping Cart ER Diagram | Entity Relationship Diagram
Inquiries:
If you have inquiries or suggestions about the Class Diagram discussion, just leave us your comments below. We would be glad to hear to concerns and be part of your learning.
How to read a class diagram
A class diagram has three components in each class box: name (top), attributes (middle), operations/methods (bottom). Relationships between classes are shown as lines with different symbols.
- Association. Plain line means two classes know about each other.
- Inheritance / Generalization. Line with a hollow arrowhead pointing to the parent class.
- Realization. Dashed line with hollow arrowhead pointing to an interface.
- Aggregation. Line with a hollow diamond at the whole end (e.g., Department has Employees).
- Composition. Filled diamond at the whole end (e.g., House is composed of Rooms).
- Dependency. Dashed arrow: one class uses another temporarily.
Cardinality notation
- 1. Exactly one
- 0..1. Zero or one (optional)
- 1..*. One or more (mandatory + many)
- 0..* or *. Zero or more (any number)
- 1..5. Between 1 and 5
Common capstone mistakes to avoid
- Missing cardinality. Every association must have numbers on both ends.
- Getters/setters listed as separate methods. Show only meaningful business methods.
- No visibility modifiers. Use + (public), – (private), # (protected).
- Confusing aggregation vs composition. Composition means the part cannot exist without the whole.
Where the class diagram fits in Chapter 3
- Section 3.2 (Object-Oriented Analysis and Design).
- Reference from the ER diagram. Show how database tables map to classes.
- Reference from the use case diagram. Each use case triggers operations on one or more classes.
- Include a legend. Explain the notation for panel members.
Official documentation
Working source code for this system
Download the actual implementation of this system in your preferred language. Each project includes source code, database, and setup instructions for BSIT capstone use.
Frequently asked questions
What is a class diagram used for in BSIT capstone?
A class diagram shows the static structure of the system: classes, attributes, methods, and relationships (inheritance, association, aggregation, composition). It goes in Chapter 3 of the capstone documentation and communicates the object-oriented design of the system.
What tool should I use to draw the class diagram?
Free options: draw.io (browser-based, saves to Google Drive), Lucidchart free tier, PlantUML (text-based, version-controllable), StarUML (30-day trial then reduced feature set), Visual Paradigm Community Edition. Paid options: Microsoft Visio, Lucidchart pro, Enterprise Architect. For BSIT capstones, draw.io is the most commonly used free tool.
How detailed does the class diagram need to be for capstone defense?
Panel members expect the diagram to match the actual system implementation. Include every major class/use case/entity relevant to the system. Omit trivial helper classes. Every diagram element should have a clear justification. Aim for 1-2 diagrams that fully cover the system, not many partial ones.
Should I use black-and-white or colored diagrams?
Black-and-white is standard for capstone documentation to match the thesis format. Use color only if it improves clarity (e.g., grouping subsystems). Ensure text is readable at printed size (10pt minimum for labels).
Where does this diagram go in the capstone documentation?
Chapter 3 (System Design and Methodology) typically holds all UML diagrams. Introduce each diagram with a 1-paragraph description explaining what it shows and how to read it. Reference specific elements in the surrounding text so panel members can follow the design rationale.
Mary Grace G. Patulada
Programmer & Technical Writer at PIES IT Solution
Mary Grace G. Patulada (pen name ‘Nym’) is a programmer and writer at PIES IT Solution with a BSIT background from Carlos Hilado Memorial State College, Binalbagan Campus. Authored 370+ UML diagram tutorials and capstone documentation guides at itsourcecode.com. Specializes in UML (class, use case, activity, sequence, component, deployment), DFD, and ER diagrams for BSIT capstone projects.
Expertise: UML Diagrams · DFD · ER Diagrams · Use Case Diagrams · Activity Diagrams · Capstone Documentation · PHP
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