Re: How to detect End-of-File?

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 02 Apr 2007 15:35:58 -0700

Message-ID:

<gzfQh.170277$ia7.110007@newsfe14.lga>

newbie_at_sendmail wrote:

Hi,

I'm quite new to java and I have huge problems doing something as simple as reading a file (up to end-of-file).
Can anybody please tell me what I'm doing wrong/is missing? I can't figure it out.

Thanks in advance.

package end_of_file;

import java.lang.String;
import java.io.File;
import java.util.Scanner;
import java.io.IOException;
import java.io.EOFException;
import static java.lang.System.out;

public class this_will_never_work
{
  public static void main(String args[]) throws IOException
  {
    Scanner myScanner =
        new Scanner(new File("c:\\temp\\this_will_never_work.txt"));
    while (true)
    {
      try
      {
        String regel = myScanner.nextLine();
        out.println("Gelezen regel= "+regel);
        throw EOFException;
      } catch (EOFException e) {out.println("Laatste regel gelezen");}
    }
  }
}

I'm not sure that Scanner is the most convenient class or practical
class to use to get data from a random text file. If the file is some
sort of structured data then it does make some sense. What type of data
is the file and what are you going to do with it?

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

public class test {
     public static void main(String[] args) throws Exception {
         Scanner s = new Scanner(new File("test.java"));
         while (s.hasNext())
             System.out.println(s.next());
     }
}

--

Knute Johnson
email s/nospam/knute/