观察者模式（Observer Pattern）是行为型设计模式中最经典、应用最广泛的一种。它定义了一种一对多的依赖关系，让多个观察者对象同时监听某一个主题对象，当主题对象的状态发生变化时，会自动通知所有依赖它的观察者对象，使它们能够同步更新。 简单来说 ...

A structured set of Java exercises on the classic design patterns, grouped into the three families: Creational, Structural, and Behavioral. Each pattern pairs theory with runnable bad/good examples, ...

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Hello, I'm Jun. I run a study group for the Hokkaido MotionControl Network (#DoMCN), a community of engineers who love HoloLens and VR technology, where I promote the exchange of developer knowledge.