Java 8ストリーム処理

レコードJava 8ストリーム処理

/*
*author:cst
*       
*/

FlatMap()

Stream.flatMap(Function super String, ? extends Stream extends String>> mapper)

api:
Returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream is null an empty stream is used, instead.) 

     ，                        。                       。（       null，             ）

 ：
List list = Arrays.asList(3,5,6,9,23,69,6,3,8,63);

Stream s = list.stream().flatMap(e->filteInteger(e));
s.forEach(e->System.out.println(e));

private static Stream filteInteger(Integer i)
	{
		List l = new LinkedList();
		if(i.intValue()>10)
		{
			l.add(1);l.add(2);
		}
		return l.stream();
	}
	
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