[Design mode] policy mode-overall situation of encapsulated Behavior

OO Basics

Abstraction

Encapsulation

Polymorphism

Inheritance

 

OO principles

Encapsulation changes

Multi-Purpose Combination and less inheritance

For interface programming, not for implementation programming

OO Mode

Rule mode: defines algorithm families, which are encapsulated separately so that they can be replaced with each other. This mode allows algorithm changes to be independent of algorithm customers.

1. Knowing the OO basics is not enough for you to design a good OO system.

2. Good OO design must be reusable, extensible, and maintainable.

3. The model allows us to build a system with good OO design quality.

4. The pattern is considered as proven OO design experience.

5. The pattern is not code, but a general solution to the design problem. You can apply them to specific applications.

6. The pattern is not invented, but discovered.

7. Most models and principles focus on the subject of software changes.

8. Most of the modes allow local system changes to be independent of other components.

9. We often extract the changed part of the system and encapsulate it.

10. The mode allows developers to share languages and maximize the value of communication.

Design Mode: Rule mode-overall situation of encapsulated behavior