未找到Scanner类java文件 [英] Scanner class java file not found

问题描述

扫描程序类无法找到文件
我使用NetBeansIDE，而test.txt位于文件夹路径中：D：\ netbeans project works \ReadFile \src \readfile \ test.txt

Scanner Class couldnt find the file I use NetBeansIDE, and the test.txt is in the folder path: D:\netbeans project works\ReadFile\src\readfile\test.txt

在readfile.java存在的同一文件夹中。
代码如下。
生成未找到的文件。

in the same folder the readfile.java exsist. the code is as below. It generates file not found.

package readfile;

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


public class ReadFile {

    public static void main(String[] args) throws IOException , FileNotFoundException 
    {  
        Scanner scanner = new Scanner(new File("test.txt"));  

        while (scanner.hasNextLine())  
            System.out.println(scanner.nextLine());  
    }  
}

输出： -

run:
Exception in thread "main" java.io.FileNotFoundException: test.txt (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:106)
    at java.util.Scanner.<init>(Scanner.java:636)
    at readfile.ReadFile.main(ReadFile.java:14)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

推荐答案

在创建扫描仪 class：

System.out.println(new File("test.txt").getAbsolutePath());

它将显示JVM期望找到该文件的位置以及它是否是您期望的文件夹。

It will show you where JVM expects to find the file and whether it is the folder you expect as well.

同时检查文件权限。但很可能这是默认JVM目录的问题。

Also check file permissions. But most likely it is a problem with default JVM directory.

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