Computer scienceFundamentalsEssentialsSoftware constructionDesign patternsStructural design patterns

Decorator pattern

Decorator diagram

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Here we have an example of a decorator pattern class diagram.

For the ComputerParts class, method addPart() prints "Adding CPU, Motherboard, PowerSupply, RAM". For wrappers, we add additional words( SSD -"SSD", GPU -"GPU", Peripherals-"Mouse and keyboard").

We need to print the text "Adding CPU, Motherboard, PowerSupply, RAM, SSD, GPU". How should we call our objects in code?

decorator pattern class diagram for computer assembling

Select one option from the list

Activity act = new GPU(new SSD(new ComputerParts()))

Activity act = new GPU()

Activity act = new SSD(new ComputerParts())

Activity act = new Peripherals(new SSD(new ComputerParts()))

Activity act = new Peripherals(new ComputerParts())

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