Object Oriented Design

Relationships between Classes

When designing a program, it is useful to document the relationships between classes.
- For classes with common behavior, you can save effort by placing the common behavior in a base class.
- For classes that are not related to each other, you can assign different programers to implement each of them.
The inheritance relationship is a very important relationship between classes.
The relationship is often described as the is-a relationship.
- Every truck is a vehicle.
- Every savings account is a bank account.