/**
* BufferedReader 缓存读取流
* trim 清除空格
* filter 过滤
* e->e Lambda表达式
* lines 是流,只能调用一次
*/
public class File6 {
public static void main(String[] args) throws FileNotFoundException {
String path = "E:\byshop\src\main\java\cn\by\dao\GoodsDao.java";
BufferedReader br = new BufferedReader(new FileReader(path));
System.out.println(br.lines().filter(e->e.trim().length()>0).count());
}
}