Relationship Between Classes - Detail Explaination

So far you have learned about classes and how to represent them in the Class Diagram, which is one of the two main constituents of the class diagram. Now you will start with the other main constituent of the class diagram, the relationship between classes. In the next video, you will learn about different types of relationships that can exist between classes.

In the previous video, you learnt that classes have to interact with each other for your system to work as desired. These interactions are represented as relationship between different classes. There are essentially four different types of relationships that can exist between classes:

1. Association
2. Generalisation
3. Aggregation
4. Composition

Video Transcript

The classes in a system can interact with each other to achieve a functionality, so interactions can be viewed as different relationships. For example, an admin could interact with an inventory manager to manage the inventory. An inventory manager could interact the supplier to place an order. These are all different relationships between different classes. Largely, the relationship between classes can be categorized into one of these four types, namely association, generalization, aggregation and composition

Transcript Summary

• Classes in a system interact with each other to achieve functionality, creating different relationships.

• Examples of relationships include an admin managing inventory with an inventory manager, and an inventory manager placing orders with a supplier.

• Relationships between classes can be categorized into four types: association, generalization, aggregation, and composition.

• Understanding these relationships is key to designing and implementing effective software systems.

• To summarize, different classes in a system interact with each other in different ways, which can be categorized as association, generalization, aggregation, and composition.