FileInputStream如何获取File的内容？ [英] How can a FileInputStream get the content of File?

问题描述

我有一个文件 f ，我需要将它影响到 FileInputStream fs ：

 档案f =新档案（C：/dir/foo.txt）; 
 FileInputStream fs =（FileInputStream）f; 
  

但是我得到这个错误：

无法从File转换到FileInputStream 
  

fs 获取 f ？

解决方案
pre $ FileInputStream fs = new FileInputStream（f）;

I have a file f and I need to affect it into a FileInputStream fs :

File f = new File("C:/dir/foo.txt");
FileInputStream fs = (FileInputStream)f;

But i get this error :

Cannot cast from File to FileInputStream

How can fs get the content of f?

解决方案

The trick is this:

FileInputStream fs = new FileInputStream(f);

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