La solicitud
“Create an observer-pattern UML class diagram where Stock implements Subject and Investor and PriceDisplay implement Observer for stock price updates.”
Entonces pruebaAdd a NewsDisplay observer.Add a volume field to Stock.
Qué hay en este dibujo
Lee las decisiones que hay detrás.
01
Modeled Subject and Observer as interfaces for extensibility.
02
Used aggregation to show the subject holds a collection of observers.
03
Added directed associations from observers back to the subject for state retrieval.
When designing systems requiring one-to-many dependencies and automatic notifications, such as event handling, monitoring, or publish-subscribe mechanisms.