File Not Found after throws IOException

Question

I get this exception when I try to read from a file:

ERROR:
Exception in thread "main" java.io.FileNotFoundException: newfile.txt (No such file or directory)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:138)
    at java.util.Scanner.<init>(Scanner.java:611)
    at Postal.main(Postal.java:19)

import java.util.Scanner;
import java.io.*;

public class Postal   { 

    public static void main(String[] args) throws Exception   {
        /*** Local Variables ***/
        String line;
        Scanner filescan;
        File file = new File("newfile.txt");
        filescan = new Scanner(file);
        userInfo book = new userInfo();

        /*** Loop through newfile.txt ***/
        while (filescan.hasNext())   {
          line = filescan.nextLine();
          book.addNew(line);
        }

        book.print(0);
    }

}

You are getting a runtime exception and not a compiler error. Reason for the exception, file is not found on class path. — Juned Ahsan, Jan 21 '15 at 00:42
@JunedAsan )1) yes (2) no, it is not available *in the current directory.* — user207421, Jan 30 '15 at 00:24

score 0 · Answer 1 · answered Jan 21 '15 at 00:44

0

The class Scanner uses a FileInputStream to read the content of the file. But it can't find the file so a exception is thrown. You are using a relative path to the file, try out an absolute one.

answered Jan 21 '15 at 00:44

Crigges

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score 0 · Answer 2 · answered Jan 21 '15 at 00:47

0

Use this instead:

File file = new File(getClass().getResource("newfile.txt"));

answered Jan 21 '15 at 00:47

Malik Brahimi

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You can load the file this way or handle errors with `file.exists()`. – Malik Brahimi Jan 21 '15 at 00:52
It won't compile, as getClass().getResource() requires a URL, a string cannot be used. – gangwerz Jan 21 '15 at 01:59
Try this then: `File file = new File(getClass().getResource(new URL("newfile.txt")));` – Malik Brahimi Jan 21 '15 at 02:02
This will only work if the file is in the same package as the current class, which isn't stated anywhere. – user207421 Jan 30 '15 at 00:28

score -1 · Accepted Answer · answered Jan 21 '15 at 00:45

-1

Provide an absolute path the location where you want to create the file. And check that user has rights to create file there. One way to find the path is:

File f = new File("NewFile.txt");
if (!f.exists()) {
    throw new FileNotFoundException("Failed to find file: " + 
        f.getAbsolutePath());
}

Try this to open file:

File f = new File("/path-to-file/NewFile.txt");

answered Jan 21 '15 at 00:45

spooky

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You don't need the `exists()` check. Opening the file already does that. – user207421 Jan 30 '15 at 00:25
@EJP you should try that and see what happens. I would love to see output. – spooky Jan 30 '15 at 00:59

File Not Found after throws IOException

3 Answers3