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谁家玉笛暗飞声，散入春风满洛城。

The Factory Method is a creational design pattern that provides an interface for creating objects but allows subclasses to alter the type of objects that will be created.

朝辞白帝彩云间，千里江陵一日还。

Consider, you are building a house and you need doors.

天门中断楚江开，碧水东流至此回。

of related objects.

越人语天姥，云霞明灭或可睹。

The **Template Method** design pattern is a **behavioral pattern** that defines the skeleton of an algorithm in a base class and lets subclasses override specific steps of the algorithm without changing its structure.

李白乘舟将欲行，忽闻岸上踏歌声。

draw.