Hi, I'm new here. Need help bad!

Now I am developing an embeded jar file to make a special game client for a java game on my website.

Ok Here is what I have in my NetBeans IDE. (This is just a segment of one class of many, I transfered it to my NetBeans for quick testing purposes).

The point is, it has to fetch the game files from my server and download them to the client's computer. I already programmed in downloading, and an updating system. It functions flawlessly. What I am working on now is a loading bar. The loading bar isn't swing for the client, it is UI inside the client. I am just using swing because I'm testing in NetBeans.

::::MY PROBLEM::::
I can calculate how many bytes have been transferred so far, but I do not know how to find the total size of the value before it is all transferred over.
I labeled where in the code box as "///////HERE///////////".

Can someone tell me what I must do to get the total bytes of the file before it downloads so I can make an accurate loading bar?

Code :

 public static final File loadcache(String s1, JProgressBar progressbar)
    {
        progressbar.setIndeterminate(true);
        progressbar.setString("Analyzing " + s1);
        File file = new File((new StringBuilder()).append(System.getProperty("user.home")).append(File.separator).append("FlameScape_Cache").append(File.separator).append(s1).toString());
        System.out.print(file.length());
        if(!file.isFile())
        {
            System.out.println((new StringBuilder()).append("Data file not found locally: ").append(s1).toString());
            boolean flag = false;
            ArrayList arraylist = new ArrayList();
            String as1[] = dB;
            int i1 = as1.length;
            for(int j1 = 0; j1 < i1;)
            {
                String s2 = as1[j1];
                String s3 = (new StringBuilder()).append(s2).append(File.separator).append(s1).toString();
                System.out.print((new StringBuilder()).append("\tTrying ").append(s3).append(" => ").toString());
                try
                {
                    HttpURLConnection httpurlconnection = (HttpURLConnection)(new URL(s3)).openConnection();
                    if(httpurlconnection.getResponseCode() != 200)
                    {
                        System.out.println("Unable to obtain file. (" + httpurlconnection.getResponseCode() + ")");
                        continue;
                    }
                    System.out.print("Downloading.. ");
                    InputStream inputstream = httpurlconnection.getInputStream();
                    file.createNewFile();
                    FileOutputStream fileoutputstream = new FileOutputStream(file);
                    int Total = ///////HERE///////////;
                    progressbar.setIndeterminate(false);
                    byte abyte1[] = new byte[1024];
                    int Progress = 0;
                    for(int k1 = 0; (k1 = inputstream.read(abyte1)) != -1;) {
                        Progress = Progress + abyte1.length;
                        fileoutputstream.write(abyte1, 0, k1);
                        progressbar.setValue(Math.round((Progress/Total)*100));
                        progressbar.setString(Math.round((Progress/Total)*100)) + "%");
 
                    }
                    inputstream.close();
                    fileoutputstream.close();
                    System.out.println("Done.");
                    break;
                }
                catch(Exception exception1)
                {
                    System.out.println("Unable to obtain file.");
                    arraylist.add(exception1);
                    j1++;
                }
            }
 
            if(arraylist.size() == dB.length)
            {
                System.out.println((new StringBuilder()).append("Downloading data file ").append(s1).append(" failed.\nPlease report the error, and include the following exception data:").toString());
                Exception exception;
                for(Iterator iterator = arraylist.iterator(); iterator.hasNext(); exception.printStackTrace())
                    exception = (Exception)iterator.next();
 
                System.exit(1);
            }
        } else {
            System.out.println("The file: " + s1 + " has been found locally.");
            System.out.print((new StringBuilder()).append("\tTesing Checksum (").append(s1).append(")").append(" => ").toString());
            String CHECKSUM1 = "";
            String CHECKSUM2 = "";
            try {
                 CHECKSUM1 = MD5Checksum.getMD5Checksum(file.getPath());
                 URL CheckServ = new URL("//LINK TO DATA DIRECTORY//remotechecksum.php?file=" + s1);
                 URLConnection yc = CheckServ.openConnection();
                 BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));
                 String inputLine;
                 while ((inputLine = in.readLine()) != null) {
                     CHECKSUM2 = inputLine;
                     break;
                 }
                 in.close();
            } catch (Exception e) {
                 e.printStackTrace();
            }
            System.out.print("(1)" + CHECKSUM1 + ".. (2)" + CHECKSUM2 + "..");
            if(CHECKSUM1.equalsIgnoreCase(CHECKSUM2)) {
                System.out.print("\tChecksum success.  Matching strings.");
            } else {
                System.out.println((new StringBuilder()).append("\tChecksum failed.  Nonmatching strings.").append(s1).toString());
               //DOWNLOAD CODE REPEATED//
            }
 
        }
        s1 = file.getAbsolutePath();
        return file;
    }