线程“主”中的异常java.io.FileNotFoundException:错误 [英] Exception in thread "main" java.io.FileNotFoundException: Error
问题描述
我正在收到错误。
线程main中的异常java.io.FileNotFoundException:file.txt(系统找不到指定的文件)
在java.io .FileInputStream.open(Native Method)
在java.io.FileInputStream。< init>(未知源)
在java.util.Scanner。< init>(未知来源)
在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 {
扫描程序KB =新扫描程序file.txt的));
while(KB.hasNext()){
String line = KB.nextLine();
System.out.println(line);
}
}
}
File.txt
我在项目中的同一个文件夹中创建了file.txt。
您的文件应该直接位于项目文件夹下,而不在任何其他子文件夹中。
所以,如果你的项目文件夹是 MyProject
,它的文件夹结构(不完整)应该是: -
MyProject + - src +
| |
| + - 您的源文件
+ - file.txt
不应该是在src
文件夹下。
或者,您可以给出以下路径相对到项目文件夹以在 src文件夹中搜索文件
: -
新建文件(src / file.txt);
I am using Eclipse to compile and run my java codes.
Here is Error I am getting.
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)
Here is my Code
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);
}
}
}
File.txt
I have created file.txt in same folder in my project.
Your file should directly be under the project folder, and not inside any other sub-folder.
So, if your project folder is MyProject
, it's folder structure(not complete though) should be like: -
MyProject +- src +
| |
| +-- Your source file
+- file.txt
It should not be under src
folder.
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");
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