hello,
I need help for my code, I created an interface that contains a button and a JProgressBar with the netbeans interface, but I do not know how to change the color of the JProgressBar, I tried the method setBackground (Color.color), click right on the JProgressBar proprties Does not change the color Can Any One please help me and thanks.

well, for variables in an interface, you can only declare Constants, so I don't think you should declare a JProgressbar there. could you show us your code, so we can see a bit more of what you are doing?

ok,this is my code,my interface is a boutton "start" with a Jprogressbar,i want to change the color progress of the JprogressBar to the blue,
thanks a lot for your help

import java.awt.Color;
import java.awt.event.*;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;
import javax.swing.Timer;
import javax.swing.UIManager;
import java.awt.Color;
import org.jdesktop.beansbinding.BindingGroup;
public class acceuil1_1_1 extends javax.swing.JFrame implements ActionListener {
private BindingGroup bindingGroup;
public acceuil1_1_1() {
initComponents();
jProgressBar1.setBackground(Color.BLUE);
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
SwingWorker worker = new SwingWorker() { 
            private Color Color;
           
            @Override 
            protected Object doInBackground() throws Exception { 
                for (int i = 0; i < 100; i++) { 
                    try { 
                        Thread.sleep(10); 
                    } catch (InterruptedException e) { 
                    } 
                    jProgressBar1.setValue(i); 
                } 
                return null; 
            } 

            @Override 
            protected void done() { 
           
           jProgressBar1.setValue(0); 
            } 
        }; 
        
        worker.execute(); 
    }
   
    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 [url]http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html[/url] 
         */
        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_1().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.");
    }

 
    
    }

Edited 4 Years Ago by Ezzaral: Fixed code tags.

how can I resolve this problem please help me,I'am a biginner in java

1) again not easy jog, nor for beginer

2) I'm lazy that wrote that for myself, there are must exist examples for Nimbus Painter,

3) how can I resolve this problem please help me,I'am a biginner in java == use Nimbus as without any modifications,

4) I'am a biginner in java == modifications in Look & Feel, changes for Colors, Skins ...., required deepest knowledges about Swing and very good from Java, no way

5) Nimbus is too Buggy, oudated, non_user_friendy, nor easy settable, use some of todays Look and Feels,

Edited 4 Years Ago by mKorbel: n/a

sure that's contraproductive

import java.awt.BorderLayout;
import java.awt.event.*;
import java.beans.*;
import java.util.LinkedList;
import java.util.Queue;
import javax.swing.*;
import javax.swing.UIManager.LookAndFeelInfo;

public class MVC_ProgressBarThread {

    private MVC_ProgressBarThread() {
        MVC_View view = new MVC_View();
        MVC_Model model = new MVC_Model();
        MVC_Control control = new MVC_Control(view, model);
        view.setControl(control);
        JFrame frame = new JFrame("MVC_ProgressBarThread");
        frame.getContentPane().add(view);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        try {
            for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
                System.out.println(info.getName());
                if ("Nimbus".equals(info.getName())) {
                    UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (UnsupportedLookAndFeelException e) {
            // handle exception
        } catch (ClassNotFoundException e) {
            // handle exception
        } catch (InstantiationException e) {
            // handle exception
        } catch (IllegalAccessException e) {
            // handle exception
        }
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                MVC_ProgressBarThread mVC_ProgressBarThread = new MVC_ProgressBarThread();
            }
        });
    }
}

class MVC_View extends JPanel {

    private static final long serialVersionUID = 1L;
    private MVC_Control control;
    private JProgressBar progressBar = new JProgressBar();
    private JButton startActionButton = new JButton("Press Me and Run this Madness");
    private JLabel myLabel = new JLabel("Nothing Special");

    public MVC_View() {
        startActionButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                buttonActionPerformed();
            }
        });
        JPanel buttonPanel = new JPanel();
        startActionButton.setFocusPainted(false);
        buttonPanel.add(startActionButton);
        setLayout(new BorderLayout(10, 10));
        add(buttonPanel, BorderLayout.NORTH);
        progressBar.setStringPainted(true);
        add(progressBar, BorderLayout.CENTER);
        myLabel.setIcon(UIManager.getIcon("OptionPane.questionIcon"));
        myLabel.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        add(myLabel, BorderLayout.SOUTH);
    }

    public void setControl(MVC_Control control) {
        this.control = control;
    }

    private void buttonActionPerformed() {
        if (control != null) {
            control.doButtonAction();
        }
    }

    public void setProgress(int progress) {
        progressBar.setValue(progress);
    }

    public void setProgressLabel(String label) {
        progressBar.setString(label);
    }

    public void setIconLabel(Icon icon) {
        myLabel.setIcon(icon);
    }

    public void start() {
        startActionButton.setEnabled(false);
    }

    public void done() {
        startActionButton.setEnabled(true);
        setProgress(100);
        setProgressLabel("   Done !!!   ");
        setIconLabel(null);
    }
}

class MVC_Control {

    private MVC_View view;
    private MVC_Model model;

    public MVC_Control(final MVC_View view, final MVC_Model model) {
        this.view = view;
        this.model = model;
        model.addPropertyChangeListener(new PropertyChangeListener() {

            public void propertyChange(PropertyChangeEvent pce) {
                if (MVC_Model.PROGRESS.equals(pce.getPropertyName())) {
                    view.setProgress((Integer) pce.getNewValue());
                }
                if (MVC_Model.PROGRESS1.equals(pce.getPropertyName())) {
                    view.setProgressLabel((String) pce.getNewValue());
                }
                if (MVC_Model.PROGRESS2.equals(pce.getPropertyName())) {
                    view.setIconLabel((Icon) pce.getNewValue());
                }
            }
        });
    }

    public void doButtonAction() {
        view.start();
        SwingWorker<Void, Void> swingworker = new SwingWorker<Void, Void>() {

            @Override
            protected Void doInBackground() throws Exception {
                model.reset();
                model.startSearch();
                return null;
            }

            @Override
            protected void done() {
                view.done();
            }
        };
        swingworker.execute();
    }
}

class MVC_Model {

    public static final String PROGRESS = "progress";
    public static final String PROGRESS1 = "progress1";
    public static final String PROGRESS2 = "progress2";
    private static final int MAX = 11;
    private static final long SLEEP_DELAY = 1000;
    private int progress = 0;
    private String label = "Start";
    private PropertyChangeSupport pcs = new PropertyChangeSupport(this);
    private PropertyChangeSupport pcs1 = new PropertyChangeSupport(this);
    private PropertyChangeSupport pcs2 = new PropertyChangeSupport(this);
    private final String[] petStrings = {"Bird", "Cat", "Dog",
        "Rabbit", "Pig", "Fish", "Horse", "Cow", "Bee", "Skunk"};
    private int index = 1;
    private Queue<Icon> iconQueue = new LinkedList<Icon>();
    private Icon icon = (UIManager.getIcon("OptionPane.questionIcon"));

    public void setProgress(int progress) {
        int oldProgress = this.progress;
        this.progress = progress;
        PropertyChangeEvent evt = new PropertyChangeEvent(this, PROGRESS, oldProgress, progress);
        pcs.firePropertyChange(evt);
    }

    public void setProgressLabel(String label) {
        String oldString = this.label;
        this.label = label;
        PropertyChangeEvent evt = new PropertyChangeEvent(this, PROGRESS1, oldString, label);
        pcs1.firePropertyChange(evt);
    }

    public void setIconLabel(Icon icon) {
        Icon oldIcon = this.icon;
        this.icon = icon;
        PropertyChangeEvent evt = new PropertyChangeEvent(this, PROGRESS2, oldIcon, icon);
        pcs2.firePropertyChange(evt);
    }

    public void reset() {
        setProgress(0);
    }

    public void addPropertyChangeListener(PropertyChangeListener listener) {
        pcs.addPropertyChangeListener(listener);
        pcs1.addPropertyChangeListener(listener);
        pcs2.addPropertyChangeListener(listener);
    }

    public void startSearch() {
        iconQueue.add(UIManager.getIcon("OptionPane.errorIcon"));
        iconQueue.add(UIManager.getIcon("OptionPane.informationIcon"));
        iconQueue.add(UIManager.getIcon("OptionPane.warningIcon"));
        iconQueue.add(UIManager.getIcon("OptionPane.questionIcon"));
        for (int i = 0; i < MAX; i++) {
            int newValue = (100 * i) / MAX;
            setProgress(newValue);
            setProgressLabel(petStrings[index]);
            index = (index + 1) % petStrings.length;
            setIconLabel(nextIcon());
            try {
                Thread.sleep(SLEEP_DELAY);
            } catch (InterruptedException e) {
            }
        }
    }

    private Icon nextIcon() {
        Icon icon1 = iconQueue.peek();
        iconQueue.add(iconQueue.remove());
        return icon1;
    }
}

Edited 4 Years Ago by mKorbel: n/a

A quick question for mKorbel:
why three different PropertyChangeSupport objects, isn't the property name enough to distinguish the events? thanks.

@JamesCherrill

1) let's imagine that there are three Models

2) let's imagine that there are three SwingWorkers (Executor.execu...)

3) SwingWorker required strictly naming of each thread, otherwise you can get only Got Exception

4) that's most confortable naming that (there are only these three threads, then there are only these three areas that can returns exception) before as multiplaying XxxProperty(Xxx),

- maybe wrong habbits, but code is readable and simple for visual refractoring, and in debug mode returs me real statuses, sure that same as creating Object for every methods, that's my decision, habbits and on 1st place layzness

- but true is that I codding only Linear way and if I returns any Object that this Object doesn't required any additional whatever, Object is before anything properly named, validated and formatted,

how can I resolve this problem please help me,I'am a biginner in java

Did you try setForeground(someColor) like I suggested?

thanks for all my problem was resolved and mKorbel thanks for the example

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