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Update Java8Tutorial.md

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Liu Guangming 2019-05-09 12:46:34 +08:00
parent 37c44a26c4
commit 6f4c5d45b4
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docs/java/What's New in JDK8/Java8Tutorial.md
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@ -442,15 +442,15 @@ optional.ifPresent((s) -> System.out.println(s.charAt(0))); // "b"
首先看看Stream是怎么用，首先创建实例代码的用到的数据List：
```java
List<String> stringCollection = new ArrayList<>();
stringCollection.add("ddd2");
stringCollection.add("aaa2");
stringCollection.add("bbb1");
stringCollection.add("aaa1");
stringCollection.add("bbb3");
stringCollection.add("ccc");
stringCollection.add("bbb2");
stringCollection.add("ddd1");
List<String> stringList = new ArrayList<>();
stringList.add("ddd2");
stringList.add("aaa2");
stringList.add("bbb1");
stringList.add("aaa1");
stringList.add("bbb3");
stringList.add("ccc");
stringList.add("bbb2");
stringList.add("ddd1");
```
Java 8扩展了集合类，可以通过 Collection.stream() 或者 Collection.parallelStream() 来创建一个Stream。下面几节将详细解释常用的Stream操作：