類別圖：三隻小豬 （原型模式）

Example: 三隻小豬

---

@startuml Example-Three-Little-Pigs-Prototype-Pattern

class Wall
{
  + material: string

  + __construct(string material)
}

class Building
{
  + name: string
  + wall: Wall

  + __construct(Wall wall, string name)
}

class Program
{
  + run()
}

Building->Wall
Program-->Building
Program-->Wall

@enduml

ʕ •ᴥ•ʔ：若不熟悉 UML 類別圖，可參考UML類別圖說明。