What are some best object-oriented design practices? [closed]

Question

I didn't find any question that would be this general.

Please post whatever you find to be a useful rule for oject-oriented design.

Answer 1

There are many, many OOD practices (Google it!) if you had to pick over others I would go with SOLID an acronym for;

1. Single Responsibility Principal
2. Open/closed principle
3. Liskov substitution principle
4. Interface segregation principle
5. Dependency inversion principle

Answer 2

I have recommended the Head First Design Patterns book many times.

It gives you a good intro to the GoF Design Patterns (a more advanced book that you also should read), but also a good intro to sound OOP design principles.

Answer 3

Few other principles are

1. "Hollywood principle" which means lower layers should not depend on higher layers.
2. "Favor composition over inheritance" - composition allows changing/adding behavior at runtime and is more maintainable
3. "Program to an interface, not to the implementation" - always use abstraction as a way of referencing instead of direct coupling to the concrete class

I suggest you to look into "Head first - OOAD" as well..