SOLID design principles focus on creating code that is more understandable, maintainable, reusable, testable, and flexible. SOLID is an acronym that represents five separate software design principles:
- Single Responsibility Principle (SRP)
- Open/Closed Principle (OCP)
- Liskov Substitution Principle (LSP)
- Interface Segregation Principle (ISP)
- Dependency Inversion Principle (DIP)
Software architects should be familiar with SOLID principles and apply them in their designs and implementations. They should realize, though, that the principles are guidelines, and while you should strive to follow them, you may not always be able to accomplish that fully. Use your judgement as to when, and to what degree, these principles should be followed.
Now, let's explore the five design principles that make up SOLID in more detail.
