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Update io-design-patterns.md

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@ -215,7 +215,7 @@ static final class RunnableAdapter<T> implements Callable<T> {
工厂模式用于创建对象，NIO 中大量用到了工厂模式，比如 `Files` 类的 `newInputStream` 方法用于创建 `InputStream` 对象（静态工厂）、 `Paths` 类的 `get` 方法创建 `Path` 对象（静态工厂）、`ZipFileSystem` 类（`sun.nio`包下的类，属于 `java.nio` 相关的一些内部实现）的 `getPath` 的方法创建 `Path` 对象（简单工厂）。
```java
InputStream is Files.newInputStream(Paths.get(generatorLogoPath))
InputStream is = Files.newInputStream(Paths.get(generatorLogoPath))
```
## 观察者模式
@ -318,4 +318,4 @@ class PollingWatchService
- 装饰器模式：通过剖析 Java IO 类库源码学习装饰器模式：https://time.geekbang.org/column/article/204845
- sun.nio 包是什么，是 java 代码么？ - RednaxelaFX https://www.zhihu.com/question/29237781/answer/43653953
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