Problems with java and reading data from a CD drive in linux

Question

I have been trying to write a simple audio ripper that i can use to learn how diffrent CODEC's work but i have got stuck on the first step, i cant get my program to read from the CD, the folowing code is what i have been trying to use

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


public class learning 
{
    public static void main(String[] args) throws IOException 
    {   
        File cd = new File( "/dev/sr0" );
        RandomAccessFile rawAccess = new RandomAccessFile( cd, "r" );
        byte[] content = new byte[20];
        rawAccess.seek(19613);
        rawAccess.readFully(content);

        System.out.println(content);
    }

}

but it gives me the folowing error

Exception in thread "main" java.io.IOException: Input/output error
    at java.io.RandomAccessFile.readBytes(Native Method)
    at java.io.RandomAccessFile.read(RandomAccessFile.java:355)
    at java.io.RandomAccessFile.readFully(RandomAccessFile.java:414)
    at java.io.RandomAccessFile.readFully(RandomAccessFile.java:394)
    at learning.main(learning.java:21)

and i cant figure out why i get this, i though maby RandomFileAccess wasn't the right class to use but the only thing i could find said this should work

Any help on how to read CD's from java would be much appreciated.

Cheers Daniel

Answer 1

First of all you should mount on a directory which the user logged in the OS Linux have access. E.g. : /mnt/cdrom or /media/cdrom

After that open your mp3 file or audio file :

File cd = new File( "/dev/sr0/track1.mp3" );

or

File cd = new File( "/dev/sr0/track1.dat" );

(don't forget the extension of the Audio or Mp3 file).