problem with a JprogressBar

[kal]

hi i have a problem with my interface,i want to I want when I hit the button, the progress bar goes off, so I have not found where is the problem in my code is that any one can help me and thank you.

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JProgressBar;
public class acceuil1_1 extends javax.swing.JFrame implements ActionListener {
JProgressBar current = new JProgressBar(0, 2000);
int num = 0;

/** Creates new form acceuil1 */
public acceuil1_1() {

initComponents();
current.setValue(0);
}

// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

jProgressBar1 = new javax.swing.JProgressBar();
jButton1 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

jButton1.setText("start");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});

jLabel2.setIcon(new javax.swing.ImageIcon("C:\\Documents and Settings\\USER\\Bureau\\images_projet\\images (3).jpg")); // NOI18N

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(38, 38, 3
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 377, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(49, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(117, Short.MAX_VALUE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 238, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(109, 109, 109))
.addGroup(layout.createSequentialGroup()
.addGap(193, 193, 193)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 66, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(205, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(130, Short.MAX_VALUE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 221, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(113, 113, 113))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(26, Short.MAX_VALUE)
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 70, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(11, 11, 11)
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 1
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 29, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(40, 40, 40))
);

pack();
}// </editor-fold>




private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
while (num < 2000) {
current.setValue(num);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
num += 95;
}

}

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(acceuil1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(acceuil1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(acceuil1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(acceuil1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>

/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {
new acceuil1().setVisible(true);
}
});
}


// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JProgressBar jProgressBar1;
// End of variables declaration

@Override
public void actionPerformed(ActionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}



}

[bolsover]

Hi kal

You have quite a few problems here...

1 The JProgressBar actually displayed is 'jProgressBar1' NOT 'current' which is not displayed at all and is referenced in your jButton1ActionPerformed method.

2 The code in your jButton1ActionPerformed does not work correctly because Swing components should only be accessed from the Event Dispatch Thread (you need to do some reading up on this).

3 Your class is named 'acceuil1_1' but you have references to 'acceuil1' elsewhere in the code. This issue will not stop the the program from running (if acceuil1 exists) but does not help with debugging!!

4 As a matter of style, class names should ALWAYS start with an uppercase letter 'Accuil1' - but again this will not stop the program from running.


To get this working, try the following... It is not particulary good code - but works!
You will need to add an import for javax.swing.SwingWorker; and I suggest you read up the Java Docs for that class - very useful when programming Java Swing.

[kal]

thanks bolsover,now it works