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fix typo

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HuYe 2021-06-08 21:39:04 +08:00 committed by GitHub
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docs/java/new-features/java8-common-new-features.md
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@ -537,7 +537,7 @@ if(zoo != null){
}
```
层层判断对象分空，有人说这种方式很丑陋不优雅，我并不这么认为。反而觉得很整洁，易读，易懂。你们觉得呢？
层层判断对象非空，有人说这种方式很丑陋不优雅，我并不这么认为。反而觉得很整洁，易读，易懂。你们觉得呢？
`Optional` 是这样的实现的：