统计一个文件中的行数

/**
 * 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());
    }
}