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From: Martin Gregorie <martin@address-in-sig.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: A "current directory" concept for Java...
Date: Sat, 23 Aug 2014 14:24:33 +0000 (UTC)
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On Fri, 22 Aug 2014 23:38:43 +0000, Andreas Leitgeb wrote:

> I'll need to emulate some kind of current directory,
>
If you haven't already done so, take a look at File.listFiles() and its 
filter-equipped siblings. Those are what I've used when I've needed the 
equivalent of C's directory reading functions. The File[] array they 
return isn't in any particular order, but then neither are the files that 
repeated calls to the readdir() function returns.
 
> and will need to
> manually join user-provided relative paths (typically bare filenames)
> to that current directory for various uses (open,remove,rename,...).
>
>
easy enough using a recursive method with a File argument. Something like 
this does the trick if you want to walk a directory tree looking at all 
the files in it:

void processDirectory(File dir)
{
   File flist[] = f.listFiles();
   for (int i = 0; i < flist.length; i++
   {
      if (flist[i].isDirectory())
         processDirectory(new File(dir, flist[i].getName()));
      else
      { /* Deal with the files in the list. */ }
   }
}

> Eventually I need to spawn processes, which then need that emulated
> current directory to be their initial real current directory.
>
Do these have to be Java processes?


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