如果我要读取的文件与我正在使用的Java文件位于同一包中，为什么仍会收到“ FileNotFoundException”？ [英] If the file I am trying to read is in the same package as the java file I'm working with, why am I still getting a "FileNotFoundException"?

问题描述

我试图在我的Java程序中读取名为 HelloJavaTest.java
的文件，但我一直在获取 FileNotFoundException 错误。

I am trying to read a file in my java program called HelloJavaTest.java but I keep on getting a FileNotFoundException error.

我要导入的文件（ hello.txt ）与<$ c在同一软件包中$ c> HelloJavaTest.java （程序包：java_files）。

The file I'm trying to import (hello.txt) is in the same package as HelloJavaTest.java (package: java_files).

以下是我尝试编译代码时弹出的消息：

Here is the message that pops up when I try to compile the code:

Exception in thread "main" java.io.FileNotFoundException: \java_files\hello.txt (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:120)
at java.util.Scanner.<init>(Scanner.java:636)
at java_files.HelloJavaTest.main(HelloJavaTest.java:42)

这是我代码顶部的内容：

Here is what I have at the top of my code:

import java.io.*;  // for File
import java.util.Scanner;

推荐答案

注释已正确指出文件读取和导入包无关。

As the comments have correctly pointed that file reading and importing packages are not related.

此处 \java_files\hello.txt 似乎程序正在尝试查找根目录 \ 中的 java_files 目录，但找不到它。

Here \java_files\hello.txt looks like the program is trying to find java_files directory in the root directory \, but is not able to find it.

如果文件位于项目中，则不要摆弄路径。

You should not fiddle with paths if the file is located within the project.

尝试使用

URL url = Main.class.getClassLoader().getResource("test.txt");
System.out.println(url.getPath());
File f = new File(url.getPath());

使用类加载器查找资源。

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