Thread: progress bar problem

Hi.. I'm new to java, I'm making application to append binary codes.
Whenever I press the execute, the program seems like stopped but it doesn't. That's why I want to make progress bar for it.

My code is

/*
 * BinergabungView.java
 */
 
package binergabung;
 
import java.awt.Color;
import org.jdesktop.application.Action;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JTextField;
import java.io.FileNotFoundException;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.File;
 
import java.awt.Toolkit;
import java.awt.Image;
import java.awt.Cursor;
 
import javax.swing.ProgressMonitor;
 
/**
 * The application's main frame.
 */
public class BinergabungView extends FrameView {
 
    public BinergabungView(SingleFrameApplication app) {
        super(app);
        initComponents();      
 
        Image icon = Toolkit.getDefaultToolkit().getImage("icon.gif");
        //Image icon = Toolkit.getDefaultToolkit().getImage(this.getFrame().getClass().getResource("/icon.gif"));
        this.getFrame().setIconImage(icon);
 
        this.getFrame().setResizable(false);
        this.getFrame().setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
 
    int counter = 0;
 
    class ProgressMonitor implements Runnable{
        public void run() {
            //run untill 100% complete
            while(counter < 100){
                //update the progressbar
                progress.setValue(++counter);
                try {
                    //Sleep for .25 second
                    Thread.sleep(10);
                } catch (InterruptedException ex) {}
            }
            System.out.println("We're done!");
        }
    }
 
 
    @Action
    public void gabung()
    {
        //create a new thread running a ProgressMonitor and start it
        new Thread(new ProgressMonitor()).start();
 
 
        String input1, input2, hasil;
        JFrame mainFrame = BinergabungApp.getApplication().getMainFrame();
 
        input1 = teks1.getText();
        input2 = teks2.getText();
        hasil = teks3.getText();
 
        if (input1.isEmpty())
        {
            status.setForeground(Color.RED);
            status.setText("Error : Please choose image file");
        }
 
        else if (input2.isEmpty())
        {
            status.setForeground(Color.RED);
            status.setText("Error : Please choose archive file");
        }
 
        else if (hasil.isEmpty())
        {
            status.setForeground(Color.RED);
            status.setText("Error : Please choose saved file");
        }
 
        else
        {
            status.setForeground(Color.BLUE);
            status.setText("Status : Processing..");
            mainFrame.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
 
            try
            {
                FileInputStream fstream1 = new FileInputStream(input1);
                FileInputStream fstream2 = new FileInputStream(input2);
 
                DataInputStream in1 = new DataInputStream(fstream1);
                DataInputStream in2 = new DataInputStream(fstream2);
 
                FileOutputStream fos = new FileOutputStream(hasil, false);
 
                while (in1.available() !=0)
                {
                    fos.write(in1.readByte());
                }
 
                status.setForeground(Color.BLUE);
                status.setText("Status : 50% Done");
 
                while (in2.available() !=0)
                {
                    fos.write(in2.readByte());
                }
 
                fos.close();
                in1.close();
                in2.close();
 
                status.setForeground(Color.BLUE);
                status.setText("Status : Completed");
            }
            catch(FileNotFoundException ex)
            {
                System.out.println("FileNotFoundException : " + ex);
                status.setForeground(Color.RED);
                status.setText("Error : File not found");
            }
            catch(IOException ioe)
            {
                System.out.println("IOException : " + ioe);
                status.setForeground(Color.RED);
                status.setText("Error : IO error");
            }
 
            mainFrame.setCursor(Cursor.getDefaultCursor());
        }
    }
 
    @Action
    public void browsefile(JTextField kotak, String status)
    {
        int pilih = bokspilih.showDialog(bokspilih, status);
 
        if (pilih == bokspilih.APPROVE_OPTION)
        {
            File file = bokspilih.getSelectedFile();
 
            try
            {
                kotak.setText(file.getAbsolutePath());
 
                if (!teks1.getText().isEmpty() && !teks2.getText().isEmpty() && !status.equalsIgnoreCase("save"))
                {
                    String namafile, ekstensi;
 
                    namafile = teks1.getText();
                    namafile = namafile.trim();
 
                    int posisi = namafile.lastIndexOf(".");
                    ekstensi = namafile.substring(posisi);
 
                    if (0 < posisi && posisi <= namafile.length() - 2 )
                    namafile = namafile.substring(0, posisi);
 
                    namafile = namafile.concat("-muxed").concat(ekstensi);
                    teks3.setText(namafile);
                }
            }
            catch(Exception e)
            {
                System.out.println(e.getMessage());
            }
 
        }
    }
 
    @Action
    public void showAboutBox() {
        if (aboutBox == null) {
            JFrame mainFrame = BinergabungApp.getApplication().getMainFrame();
            aboutBox = new BinergabungAboutBox(mainFrame);
            aboutBox.setLocationRelativeTo(mainFrame);
        }
        BinergabungApp.getApplication().show(aboutBox);
    }
 
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
 
        mainPanel = new javax.swing.JPanel();
        teks1 = new javax.swing.JTextField();
        teks2 = new javax.swing.JTextField();
        teks3 = new javax.swing.JTextField();
        tombol = new javax.swing.JButton();
        browse1 = new javax.swing.JButton();
        browse2 = new javax.swing.JButton();
        browse3 = new javax.swing.JButton();
        status = new javax.swing.JFormattedTextField();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        statusPanel = new javax.swing.JPanel();
        progress = new javax.swing.JProgressBar();
        menuBar = new javax.swing.JMenuBar();
        javax.swing.JMenu fileMenu = new javax.swing.JMenu();
        javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
        javax.swing.JMenu helpMenu = new javax.swing.JMenu();
        javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
        bokspilih = new javax.swing.JFileChooser();
 
        mainPanel.setName("mainPanel"); // NOI18N
 
        teks1.setEditable(false);
        org.jdesktop.application.ResourceMap resourceMap = org.jdesktop.application.Application.getInstance(binergabung.BinergabungApp.class).getContext().getResourceMap(BinergabungView.class);
        teks1.setText(resourceMap.getString("teks1.text")); // NOI18N
        teks1.setName("teks1"); // NOI18N
 
        teks2.setEditable(false);
        teks2.setText(resourceMap.getString("teks2.text")); // NOI18N
        teks2.setName("teks2"); // NOI18N
 
        teks3.setEditable(false);
        teks3.setText(resourceMap.getString("teks3.text")); // NOI18N
        teks3.setName("teks3"); // NOI18N
 
        javax.swing.ActionMap actionMap = org.jdesktop.application.Application.getInstance(binergabung.BinergabungApp.class).getContext().getActionMap(BinergabungView.class, this);
        tombol.setAction(actionMap.get("gabung")); // NOI18N
        tombol.setText(resourceMap.getString("tombol.text")); // NOI18N
        tombol.setName("tombol"); // NOI18N
 
        browse1.setText(resourceMap.getString("browse1.text")); // NOI18N
        browse1.setActionCommand(resourceMap.getString("browse1.actionCommand")); // NOI18N
        browse1.setName("browse1"); // NOI18N
        browse1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                browse1ActionPerformed(evt);
            }
        });
 
        browse2.setText(resourceMap.getString("browse2.text")); // NOI18N
        browse2.setName("browse2"); // NOI18N
        browse2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                browse2ActionPerformed(evt);
            }
        });
 
        browse3.setText(resourceMap.getString("browse3.text")); // NOI18N
        browse3.setName("browse3"); // NOI18N
        browse3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                browse3ActionPerformed(evt);
            }
        });
 
        status.setBorder(javax.swing.BorderFactory.createCompoundBorder(javax.swing.BorderFactory.createCompoundBorder(), javax.swing.BorderFactory.createEtchedBorder()));
        status.setEditable(false);
        status.setForeground(resourceMap.getColor("status.foreground")); // NOI18N
        status.setText(resourceMap.getString("status.text")); // NOI18N
        status.setName("status"); // NOI18N
 
        jLabel1.setFont(resourceMap.getFont("jLabel1.font")); // NOI18N
        jLabel1.setText(resourceMap.getString("jLabel1.text")); // NOI18N
        jLabel1.setName("jLabel1"); // NOI18N
 
        jLabel2.setFont(resourceMap.getFont("jLabel2.font")); // NOI18N
        jLabel2.setText(resourceMap.getString("jLabel2.text")); // NOI18N
        jLabel2.setName("jLabel2"); // NOI18N
 
        jLabel3.setFont(resourceMap.getFont("jLabel3.font")); // NOI18N
        jLabel3.setText(resourceMap.getString("jLabel3.text")); // NOI18N
        jLabel3.setName("jLabel3"); // NOI18N
 
        jLabel4.setFont(resourceMap.getFont("jLabel4.font")); // NOI18N
        jLabel4.setText(resourceMap.getString("jLabel4.text")); // NOI18N
        jLabel4.setName("jLabel4"); // NOI18N
 
        statusPanel.setBackground(resourceMap.getColor("statusPanel.background")); // NOI18N
        statusPanel.setName("statusPanel"); // NOI18N
 
        javax.swing.GroupLayout statusPanelLayout = new javax.swing.GroupLayout(statusPanel);
        statusPanel.setLayout(statusPanelLayout);
        statusPanelLayout.setHorizontalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 387, Short.MAX_VALUE)
        );
        statusPanelLayout.setVerticalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 13, Short.MAX_VALUE)
        );
 
        progress.setName("progress"); // NOI18N
 
        javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
        mainPanel.setLayout(mainPanelLayout);
        mainPanelLayout.setHorizontalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(mainPanelLayout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addGroup(mainPanelLayout.createSequentialGroup()
                                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jLabel2)
                                    .addComponent(jLabel3)
                                    .addComponent(jLabel1))
                                .addGap(13, 13, 13))
                            .addGroup(mainPanelLayout.createSequentialGroup()
                                .addComponent(jLabel4)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)))
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addGroup(mainPanelLayout.createSequentialGroup()
                                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(teks2)
                                    .addComponent(teks1, javax.swing.GroupLayout.DEFAULT_SIZE, 218, Short.MAX_VALUE))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED))
                            .addGroup(javax.swing.GroupLayout.Alignment.LEADING, mainPanelLayout.createSequentialGroup()
                                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                    .addComponent(status)
                                    .addComponent(teks3, javax.swing.GroupLayout.DEFAULT_SIZE, 218, Short.MAX_VALUE))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)))
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(browse3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(browse1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(browse2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                    .addGroup(mainPanelLayout.createSequentialGroup()
                        .addGap(78, 78, 78)
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(progress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(tombol))))
                .addContainerGap(13, Short.MAX_VALUE))
            .addComponent(statusPanel, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        mainPanelLayout.setVerticalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addGroup(mainPanelLayout.createSequentialGroup()
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(teks1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(browse1))
                        .addGap(26, 26, 26))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, mainPanelLayout.createSequentialGroup()
                        .addComponent(jLabel1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jLabel4)
                        .addGap(18, 18, 18)))
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(teks2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(browse2, javax.swing.GroupLayout.PREFERRED_SIZE, 20, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel2))
                .addGap(34, 34, 34)
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(teks3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(browse3)
                    .addComponent(jLabel3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(status, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(1, 1, 1)
                .addComponent(progress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(tombol)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(statusPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
 
        menuBar.setBackground(resourceMap.getColor("menuBar.background")); // NOI18N
        menuBar.setName("menuBar"); // NOI18N
 
        fileMenu.setBackground(resourceMap.getColor("fileMenu.background")); // NOI18N
        fileMenu.setForeground(resourceMap.getColor("fileMenu.foreground")); // NOI18N
        fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
        fileMenu.setName("fileMenu"); // NOI18N
 
        exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
        exitMenuItem.setName("exitMenuItem"); // NOI18N
        fileMenu.add(exitMenuItem);
 
        menuBar.add(fileMenu);
 
        helpMenu.setBackground(resourceMap.getColor("helpMenu.background")); // NOI18N
        helpMenu.setForeground(resourceMap.getColor("helpMenu.foreground")); // NOI18N
        helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
        helpMenu.setName("helpMenu"); // NOI18N
 
        aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
        aboutMenuItem.setName("aboutMenuItem"); // NOI18N
        helpMenu.add(aboutMenuItem);
 
        menuBar.add(helpMenu);
 
        bokspilih.setName("bokspilih"); // NOI18N
 
        setComponent(mainPanel);
        setMenuBar(menuBar);
        setStatusBar(statusPanel);
    }// </editor-fold>
 
    private void browse1ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        this.browsefile(teks1, "Open");
}                                       
 
    private void browse2ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        this.browsefile(teks2, "Open");
    }                                       
 
    private void browse3ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        this.browsefile(teks3, "Save");
    }                                       
 
    // Variables declaration - do not modify
    private javax.swing.JFileChooser bokspilih;
    private javax.swing.JButton browse1;
    private javax.swing.JButton browse2;
    private javax.swing.JButton browse3;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel mainPanel;
    private javax.swing.JMenuBar menuBar;
    private javax.swing.JProgressBar progress;
    private javax.swing.JFormattedTextField status;
    private javax.swing.JPanel statusPanel;
    private javax.swing.JTextField teks1;
    private javax.swing.JTextField teks2;
    private javax.swing.JTextField teks3;
    private javax.swing.JButton tombol;
    // End of variables declaration
 
    private JDialog aboutBox;
}

The problem is the progress bar is not working, I've read about making new progress monitor thread in java-forums.org/new-java/19903-trying-use-progress-bar-first-time.html but it's not working also.

What I mean not working is, the progress bar not started when I press the execute button. But after the execution finished, the progress monitor already full.

As you can see I'm using setText to change the status to 'processing'

status.setText("Status : Processing..");

But the status never come out..

After that status I set wait cursor to it

mainFrame.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));

And it's working..

Why setting cursor working but not with the text and progress bar?

I'm using netbeans 6.7.1

Hope you can help thanks..

Lesson: Concurrency in Swing (The Java™ Tutorials > Creating a GUI With JFC/Swing)
Lesson: Concurrency (The Java™ Tutorials > Essential Classes)

First, if your browseFile function takes a long time you should do it in a different thread so the GUI doesn't lock up. Right now it is in the Event Dispatch thread (EDT), which is why the text isn't updating, and probably why the progress bar isn't updating. Second, you shouldn't make calls to swing gui components from threads that are not the EDT - eg your progress bar updating (unless the API says they are thread safe) - these calls should be sent to the EDT using SwingUtilities (or you can use the SwingWorker class).

Originally Posted by copeg

Lesson: Concurrency in Swing (The Java™ Tutorials > Creating a GUI With JFC/Swing)
Lesson: Concurrency (The Java™ Tutorials > Essential Classes)

First, if your browseFile function takes a long time you should do it in a different thread so the GUI doesn't lock up. Right now it is in the Event Dispatch thread (EDT), which is why the text isn't updating, and probably why the progress bar isn't updating. Second, you shouldn't make calls to swing gui components from threads that are not the EDT - eg your progress bar updating (unless the API says they are thread safe) - these calls should be sent to the EDT using SwingUtilities (or you can use the SwingWorker class).

Is this code not making new thread?

new Thread(new ProgressMonitor()).start();

I don't quote understand what you say about EDT.. I made the GUI using drag and drop function in netbeans.

I can make it working with this code in addition

this.getFrame().repaint();
this.getFrame().paintAll(null);

but I got errors in command line..

Exception in thread "AWT-EventQueue-0" java.lang.Error: java.lang.reflect.InvocationTargetException
        at org.jdesktop.application.ApplicationAction.actionFailed(ApplicationAction.java:859)
        at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:665)
        at org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6263)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:662)
        ... 27 more
Caused by: java.lang.NullPointerException
        at java.awt.Component.paintAll(Component.java:3038)
        at binergabung.BinergabungView.gabung(BinergabungView.java:70)
        ... 32 more

Originally Posted by copeg

Read the two lessons I linked to in my first post to understand Threads in java. Yes you are making a new thread, but all you are doing is updating the progress bar in it...all the while the event dispatch thread is clogged up with your actionPerformed method. actionPerformed is called from the EDT (and thus in your original code so is the browseFile function). Any calls from within the EDT get placed in the EDT queue and cannot run until actionPerformed (and any function within it) finish.

Yes I understand now that I need to make new thread.
I rewrite my code and it's working now, thanks a lot

I rewrite my code because I can't make it work in java desktop application(the GUI that generated by netbeans), so I make new normal java project. It's really pain designing the GUI using the normal java project..

I hope I can somehow make it working in it.. It's not working in java desktop because it conflicts with runnable and actionlistener.

Sorry I'm new to java so I don't really now what I'm talking about