Progressbar FTP

[Badeendje]

I'm scripting an FTP Applet in Java and I want to have a Progressbar but it doesn't work.

My code:

ftpUpload.java

package mediaplayer;
import java.io.*;
import java.net.*;
import java.awt.*;
import javax.swing.*;

public class ftpUpload {
    protected ftpConnectie cconn;
    public final String localfile;
    public final String targetfile;

    public ftpUpload(String _host, String _user, String _password, String _localfile, String _targetfile) {
        cconn= new ftpConnectie(_host, _user, _password);
        localfile= _localfile;
        targetfile= _targetfile;
        doIt();
    }

    public ftpUpload(String _host, String _user, String _password, String _file) {
        cconn= new ftpConnectie(_host, _user, _password);
        localfile= _file;
        targetfile= _file;
        doIt();
    }

    protected void doIt() {
        try {
            progress p = new progress();
            
            int percVal = 0;
            int i = 0;
            double bytesUploaded = 0;
            int currentFileUpPercent = 0;

            File fileInfo = new File(localfile);
            OutputStream os= cconn.openUploadStream(targetfile);
            FileInputStream is=  new FileInputStream(localfile);
            byte[] buf= new byte[1024];
            int c;
            while ((i = is.read(buf)) >= 0) {
                bytesUploaded += i;
                percVal = (int) ((bytesUploaded / fileInfo.length()) * 100);
                currentFileUpPercent = percVal;
                p.vulProgress(currentFileUpPercent);

                c= is.read(buf);
                if (c<= 0)  break;
                os.write(buf, 0, c);
            }
            os.close();
            is.close();
            cconn.close();
        } catch (Exception E) {
        }
    }
}

progress.java

package mediaplayer;
import java.awt.*;
import javax.swing.*;

public class progress {
    JFrame test = new JFrame();
    JProgressBar pbProgress = new JProgressBar();
    JLabel lblNaam = new JLabel();

    public progress() {
        test.setLayout(new BorderLayout());
        lblNaam.setText("Progress: ");
        test.getContentPane().add(lblNaam, BorderLayout.NORTH);
        test.getContentPane().add(pbProgress, BorderLayout.SOUTH);
        test.setSize(300,150);
        test.setEnabled(true);
        test.setVisible(true);
    }

    public void vulProgress(int proc){
        pbProgress.setValue(proc);
    }

}

And in my main-project I have the following code under a button.

    private void btnBestandActionPerformed(java.awt.event.ActionEvent evt) {                                           
        JFileChooser fc = new JFileChooser("C:/");
        MijnFilter filter = new MijnFilter();
        filter.addExtension("mp3");
        filter.addExtension("wav");
        filter.setDescription("Muziekbestanden");
        fc.setFileFilter(filter);
        if(fc.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
            File bestand = fc.getSelectedFile();
            ftpUpload fu = new ftpUpload("*ftp-folder*","*username*,"*password*",
                    bestand.getAbsolutePath(),bestand.getName());
            txtBestandUploaden.setText(bestand.getAbsolutePath());
        }
    }

If I run the code I see an empty JFrame if I upload a file and if the file is uploaded I can see all the items in my JFrame and a half filled Progressbar.
The file uploads perfectly.
Can anyone help me with this?

[ComputerJy]

Well. First of all, you're getting a half filled progress bar, because you're reading 2 bytes in your while loop and only incrementing the progress bar by 1.

Second of all, you're not seeing anything until the whole process is complete because the EventDispatcher (ED) is waiting for your operation to finish to set the value.. In other words, you're setting the value of the progress bar, but the swing is waiting for you to finish, then it'll invoke the vulProgress.

If you want to fix this, you'll need to read about SwingUtilities

[Badeendje]

Now I'm working with a Task and that works perfectly
Thanks for replying btw!

[ComputerJy]

I was going to recommend threading, but Timers are just as good