线程“main"中的异常java.io.FileNotFoundException:错误 [英] Exception in thread "main" java.io.FileNotFoundException: Error

问题描述

我正在使用 Eclipse 来编译和运行我的 Java 代码.

I am using Eclipse to compile and run my java codes.

这是我遇到的错误.

Exception in thread "main" java.io.FileNotFoundException: file.txt (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.util.Scanner.<init>(Unknown Source)
    at helloworld.main(helloworld.java:9)

这是我的代码

import java.io.File;
import java.io.IOException;
import java.util.Scanner;


public class helloworld {

    public static void main(String[] args) throws IOException {
        Scanner KB = new Scanner(new File("file.txt"));
        while (KB.hasNext()) {
            String line = KB.nextLine();
            System.out.println(line);
        }

    }
}

文件.txt
我在项目的同一文件夹中创建了 file.txt.

File.txt
I have created file.txt in same folder in my project.

推荐答案

你的文件应该直接在项目文件夹下，而不是在任何其他子文件夹内.

Your file should directly be under the project folder, and not inside any other sub-folder.

所以，如果你的项目文件夹是MyProject，它的文件夹结构(虽然不完整)应该是这样的:-

So, if your project folder is MyProject, it's folder structure(not complete though) should be like: -

MyProject +- src +
          |      |
          |      +-- Your source file
          +- file.txt

它不应该在 src 文件夹下.

It should not be under src folder.

或者，您可以给出以下相对于项目文件夹的路径来搜索src文件夹中的文件:-

Or, you can give the following path relative to the project folder to search for file in the src folder: -

new File("src/file.txt");

这篇关于线程“main"中的异常java.io.FileNotFoundException:错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！