Writing data into file from URL address

Question

Hi!
I need to download file from certain url address and write it to file on my local disk. The file being downloaded is a image file and therefore
I cannot make sure what encoding should I use. When I save file manually on disk and compare it with the file written programmatically, then
the bytes in both files are not equal. Any smart advises are welcome.
The code being used is:
import java.net.*;
import java.io.*;
public class UrlParser {
     public static void main(String[] args) {
          String data;
          try{
               // Construct a URL object
               URL url = new URL("http://stockcharts.com/c-sc/sc?s=qqqq&p=D&b=3&g=0&i=t74934638175&r=4028");
               // Open a connection to the URL object
               String encoding = "UTF8";
               BufferedReader html = new BufferedReader(new InputStreamReader(url.openStream(),encoding));      
               Writer img_out = new OutputStreamWriter(new FileOutputStream("sc.gif"), encoding);
               while((data = html.readLine()) != null) {
                    img_out.write( data );
               img_out.close();
          } catch(MalformedURLException e) {
               System.out.println(e);
          } catch(IOException e) {
               System.out.println(e);
}

Answer 1

Use InputStream and OutputStream classes, not Readers/Writers. The latter are for "text" I/O, not "binary".