流是一组具有起点和终点的有序字节。它是数据传输的总称或摘要。也就是说，两个设备之间的数据传输称为流。流的本质是数据传输。根据数据传输的特点，将流抽象为各种类别，以便于更直观的数据操作。
[En]
A stream is a set of ordered bytes with a starting point and an end point. It is the general name or abstract of data transmission. That is, the transmission of data between two devices is called a stream. The essence of the stream is data transmission. According to the data transmission characteristics, the stream is abstracted into various categories to facilitate more intuitive data operations.
1.流的创建(Stream)
这里的流是在：
import java.util.stream.Stream;可详看https://www.cnblogs.com/andywithu/p/7404101.html
使用Collection接口中的stream方法将任意集合装换为一个流。
```
public class mian {
public static void main(String[] args) throws IOException {
String contents=new String(Files.readAllBytes(Paths.get("D:\eqe.txt")), StandardCharsets.UTF_8);
List list=Arrays.asList(contents.split("\PL+"));//正则表达式按非字母分割
//普通的循环计算
int count=0;
for (String w: list) {