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6
notes/设计模式 - 观察者.md
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@ -6,7 +6,7 @@
主题（Subject）是被观察的对象，而其所有依赖者（Observer）称为观察者。
<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/7a3c6a30-c735-4edb-8115-337288a4f0f2.jpg" width="600"/> </div><br>
<div align="center"> <img src="pics/7a3c6a30-c735-4edb-8115-337288a4f0f2.jpg" width="600"/> </div><br>
### Class Diagram
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观察者（Observer）的注册功能需要调用主题的 registerObserver() 方法。
<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/a8c8f894-a712-447c-9906-5caef6a016e3.png"/> </div><br>
<div align="center"> <img src="pics/a8c8f894-a712-447c-9906-5caef6a016e3.png"/> </div><br>
### Implementation
天气数据布告板会在天气信息发生改变时更新其内容，布告板有多个，并且在将来会继续增加。
<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/b1df9732-86ce-4d69-9f06-fba1db7b3b5a.jpg"/> </div><br>
<div align="center"> <img src="pics/b1df9732-86ce-4d69-9f06-fba1db7b3b5a.jpg"/> </div><br>
```java
public interface Subject {