🚀 go-pugleaf

In article <934885178.20129.0.nnrp-14.c3add604@news.demon.co.uk>,
  "Ben Starr" <BenS@compurp.org.uk> wrote:
> Is there a way to find out the absolute path of the .class file a
Class was
> loaded from? I want a class to reference a text file on the disk
stored in
> the same directory as its .class file without having to hard-code the
path.

I don't know of any - but if you use the classloader.getResource, you
can access files (data or image etc) on the classpath.

Here's 2 methods;

   public static Reader getFile(String filenameIn)
   {
      URL url = getResource(filenameIn);
      if (url != null)
      {
         try {
            return new InputStreamReader(url.openStream());
         } catch (IOException err)
         {
            err.printStackTrace();
         }
      }
      return null;
   }

   private static URL getResource(String resource)
   {
      URL url = null;
      ClassLoader clr = ImageHelper.class.getClassLoader();
      if (clr == null)
      {
         //no current class, class loader - so use system one
         url = ClassLoader.getSystemResource(resource);
      } else
      {//use current class's class loader
         url = clr.getResource(resource);
      }
      return url;
   }

This works for files located with the class files, or in the same jar
file - even if loaded via an applet.

The filenameIn need to specify the full path, using url type naming -
eg your class is in package com.abc.pkge. The data file is in the same
directory, then filenameIn should be "com/abc/pkge/data.file"

Hope this helps,
Chris


Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.