Re: Unable to create directory

From:
"Andrew Thompson" <u32984@uwe>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 08 Oct 2007 18:53:00 GMT
Message-ID:
<79656a773457f@uwe>
Alan wrote:

I`m trying to create a directory for each URL string read in from
a file. However, one of the directories cannot be created, but the
other can. Neither exist at the start. No exception occurs.

   Am I missing something obvious? (I have not used mkdir before.)


Your example failed to fail for me here. Both
directories were created, if I deleted them, I
could create them again.

OTOH - I could not resist tweaking your code..
It uses mkdirs() rather than mkdir(). (The 's' is
an important distinction.)

<sscce>
import java.io.*;
import java.lang.*;

public class DirectoryTree
{

   public static void main ( String[] args )
   {
      try
      {
         BufferedReader infile =
            new BufferedReader(new FileReader("URLs.txt"));

         String aURL, directory;

         while ((aURL = infile.readLine()) != null)
         {
            System.out.println(aURL);
            directory = (aURL.replace("http:",""))
               .replace("/","")
               .replace(".","/");
            String[] parts = directory.split("/");
            File f = new File("cache");
            for (int ii=parts.length-1; ii>-1; ii--)
            {
               f = new File( f, parts[ii] );
            }
            System.out.println(
               "Creating directory " + f + " . . .");
            try
            {
               // important to use makedirs for this variant!
               if ((f.mkdirs()) == false)
               {
                  System.out.println(
                     "Unable to create directory " + directory);
               }
            }
            catch (SecurityException e)
            {
               e.printStackTrace();
            }
         }
         infile.close();
      }
      catch (IOException e)
      {
         e.printStackTrace();
      }
   }
}
</sscce>

--
Andrew Thompson
http://www.athompson.info/andrew/

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