public FileURLConnection(URL url) throws MalformedURLException, IOException 
{
      super(url);
      file = new File(url.getPath().replace('/", File.separatorChar).replace('|", ':"));
      doOutput = false;
}

 public  void connect() throws IOException 
{
      if (connected)
         return;
      if (!file.exists())
      {
         throw new FileNotFoundException(file.getPath());
      }
      connected = true;
}

Checks if the underlying file for this connection exists.

 public File getFile() 
{
      return file;
}

Returns the underlying file for this connection.

 public String getHeaderField(String name) 
{
      String headerField = null;
      if (name.equalsIgnoreCase("last-modified"))
         headerField = String.valueOf(getLastModified());
      else if (name.equalsIgnoreCase("content-length"))
         headerField = String.valueOf(file.length());
      else if (name.equalsIgnoreCase("content-type"))
         headerField = getFileNameMap().getContentTypeFor(file.getName());
      else if (name.equalsIgnoreCase("date"))
         headerField = String.valueOf(file.lastModified());
      else
      {
         // This always returns null currently
         headerField = super.getHeaderField(name);
      }
      return headerField;
}

Provides support for returning the value for the last-modified header.

 public InputStream getInputStream() throws IOException 
{
      if (!connected)
         connect();
      return new FileInputStream(file);
}

 public long getLastModified() 
{
      return file.lastModified();
}

Returns the last modified time of the underlying file.

 public OutputStream getOutputStream() throws IOException 
{
      if (!connected)
         connect();
      return new FileOutputStream(file);
}

 public Permission getPermission() throws IOException 
{
      return new FilePermission(file.getPath(), "read,write");
}

Return a permission for both read & write since both input and output streams are supported.