These are the code samples used in the "Solid Design Principles in Java" course published for Udemy
Udemy course link: https://www.udemy.com/course/basics-of-software-architecture-design-in-java/
S — Single Responsibility Principle
A class should have only a single responsibility. Only one potential change in the software’s specification should be able to affect the specification of the class.
O — Open/Closed Principle
Software entities should be open for EXTENSION, but closed for MODIFICATION. Allow behavior to be extended without modifying the source-code.
L — Liskov Substitution Principle
Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
I — Interface Segregation Principle
Many client-specific interfaces are better than one general-purpose interface. No client should be forced to depend on methods it does not use.
D — Dependency Inversion Principle
One should depend upon abstractions, not concretions.
- High-level modules should not depend on low-level modules. Both should depend on abstractions.
- Abstractions should not depend on details. Details should depend on abstractions.
The plug doesn’t care which type of wire it uses, it just needs wires that conduct electricity.