Design petterns

All design paterns:
https://refactoring.guru/
https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns
https://java-design-patterns.com/patterns/

Decorator pattern:
https://www.tutorialspoint.com/design_pattern/decorator_pattern.htm

Commander pattern:
https://www.youtube.com/watch?v=8gE-icd93WA

Solid principles
 S — Single Responsibility Principle
 O — Open/Closed Principle
 L — Liskov Substitution Principle
 I — Interface Segregation Principle
 D — Dependency Inversion Principle