Display progress of file transfer

Question

I made a app that uses tcp sockets to transfer a file im using ObjectOutputStream/ObjectInputStream. The thread that downloads the file has:
package chat;
import javax.swing.*;
import java.net.Socket;
import java.net.URL;
import java.io.*;
public class DownloadSocket extends Thread{
    Socket peer;
    ObjectInputStream obin;
    FileOutputStream fout;
    String fileName;
    String filePath;
    Thread runner;
    JFrame parent;
    public DownloadSocket(Socket peer, JFrame parent){
this.parent = parent;
     try{        obin=newObjectInputStreamnewBufferedInputStreampeer.getInputStream()));
            start();
        }catch(IOException ioe){}
    public void start(){
        runner = new Thread(this);
        runner.start();
    public void run(){
        try {
            fileName = (String)obin.readObject();
            byte[] b = (byte[])obin.readObject();
            fout = new FileOutputStream(fileName);
            fout.write(b);
            JOptionPane.showMessageDialog(parent,"Received File " + fileName,"Confirmation",JOptionPane.INFORMATION_MESSAGE);
        }catch(Exception e){ }
        finally{
            try{
                runner = null;
                fout.close();
                obin.close();
                peer.close();
            }catch(Exception e){}
    }How do I get the percentage of the transfer or how many bytes are sent at any given time so i can use it to update a JProgress bar at any given time. The max value for the progress bar ill be the number of byte to send and this class can send an update to it every second or so. This class send the whole file in one go so im not sure.
I also saw another file transfer snippet that gets the byte count sent, but i'd like to do it this way if possible. The other way was:
try{
            byte[] buf = new byte[1024];
                OutputStream os = socket.getOutputStream();
                BufferedOutputStream out = new BufferedOutputStream(os,1024);
                String file = "test.exe"
                FileInputStream in = new FileInputStream(file);
                int i;
                int bytecount=0;
                while ((i = in.read(buf,0,1024)) != -1){
                bytecount=bytecount+1024;
                out.write(buf,0,i);
                out.flush();
            in.close();
                out.close();
                System.out.println("Bytes Sent :"+bytecount);
        catch (IOException e){
            System.out.println(e);
        try {
            socket.close();
        catch (IOException e){
            System.out.println(e);

Answer 1

Have you considered using a ProgressMonitorInputStream?