Aprendendo a usar JProgressBar

Programação Java
#1

Oi,
estou aprendendo a utilizar a JProgressBar…

estou com uma duvida, não estou conseguindo colocar o titulo Carregando… logo acima dela, e tipo… gostaria que ela ficasse aberta em um tempo determinado fixo por mim… tipo 10 segundos.

Eu fiz um método assim:

[code]
public
void createProgressPanel()
{

io_pb_progress			=	new JProgressBar(JProgressBar.HORIZONTAL, 0) 
{
	public Dimension getPreferredSize() 
	{ 
		return new Dimension(300, super.getPreferredSize().height); 
	}
};
	
io_pb_progress.setString("Carregando..");
io_pb_progress.setIndeterminate(true);
io_pb_progress.setBounds(200,100,200,200);		
io_pb_progress.setSize(200,20);
	
//
// Adiciona ao container.
//
io_ct.add(io_pb_progress);

}[/code]

Tchauzin!

#2

import java.awt.;
import java.awt.event.;
import javax.swing.;
import java.beans.;
import java.util.Random;

public class ProgressMonitorDemo extends JPanel
implements ActionListener,
PropertyChangeListener {

private ProgressMonitor progressMonitor;
private JButton startButton;
private JTextArea taskOutput;
private Task task;

class Task extends SwingWorker<Void, Void> {
    @Override
    public Void doInBackground() {
        Random random = new Random();
        int progress = 0;
        setProgress(0);
        try {
            Thread.sleep(1000);
            while (progress < 100 && !isCancelled()) {
                //Sleep for up to one second.
                Thread.sleep(random.nextInt(1000));
                //Make random progress.
                progress += random.nextInt(10);
                setProgress(Math.min(progress, 100));
            }
        } catch (InterruptedException ignore) {}
        return null;
    }

    @Override
    public void done() {
        Toolkit.getDefaultToolkit().beep();
        startButton.setEnabled(true);
        progressMonitor.setProgress(0);
    }
}

public ProgressMonitorDemo() {
    super(new BorderLayout());

    //Create the demo's UI.
    startButton = new JButton("Start");
    startButton.setActionCommand("start");
    startButton.addActionListener(this);

    taskOutput = new JTextArea(5, 20);
    taskOutput.setMargin(new Insets(5,5,5,5));
    taskOutput.setEditable(false);

    add(startButton, BorderLayout.PAGE_START);
    add(new JScrollPane(taskOutput), BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

}


/**
 * Invoked when the user presses the start button.
 */
public void actionPerformed(ActionEvent evt) {
    progressMonitor = new ProgressMonitor(ProgressMonitorDemo.this,
                              "Running a Long Task",
                              "", 0, 100);
    progressMonitor.setProgress(0);
    task = new Task();
    task.addPropertyChangeListener(this);
    task.execute();
    startButton.setEnabled(false);
}

/**
 * Invoked when task's progress property changes.
 */
public void propertyChange(PropertyChangeEvent evt) {
    if ("progress" == evt.getPropertyName() ) {
        int progress = (Integer) evt.getNewValue();
        progressMonitor.setProgress(progress);
        String message =
            String.format("Completed %d%%.\n", progress);
        progressMonitor.setNote(message);
        taskOutput.append(message);
        if (progressMonitor.isCanceled() || task.isDone()) {
            Toolkit.getDefaultToolkit().beep();
            if (progressMonitor.isCanceled()) {
                task.cancel(true);
                taskOutput.append("Task canceled.\n");
            } else {
                taskOutput.append("Task completed.\n");
            }
            startButton.setEnabled(true);
        }
    }

}

/**
 * Create the GUI and show it.  For thread safety,
 * this method should be invoked from the
 * event-dispatching thread.
 */
private static void createAndShowGUI() {
    //Create and set up the window.
    JFrame frame = new JFrame("ProgressMonitorDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Create and set up the content pane.
    JComponent newContentPane = new ProgressMonitorDemo();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);

    //Display the window.
    frame.pack();
    frame.setVisible(true);
}

public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            createAndShowGUI();
        }
    });
}

}

#3

Rogério.

Use a tag code!

Por favor, leia o tópico:
http://www.guj.com.br/posts/list/50115.java

#4

Só pra gelera visualizar melhor ae!


import java.awt.*;
import java.awt.event.*;
  import javax.swing.*;
import java.beans.*;
   import java.util.Random;

public class ProgressMonitorDemo extends JPanel
implements ActionListener,
PropertyChangeListener {

    private ProgressMonitor progressMonitor;
    private JButton startButton;
    private JTextArea taskOutput;
    private Task task;

class Task extends SwingWorker<Void, Void> {
@Override
public Void doInBackground() {
   Random random = new Random();
   int progress = 0;
    setProgress(0);
try {
    Thread.sleep(1000);
    while (progress < 100 && !isCancelled()) {
//Sleep for up to one second.
        Thread.sleep(random.nextInt(1000));
//Make random progress.
        progress += random.nextInt(10);
        setProgress(Math.min(progress, 100));
    }
} catch (InterruptedException ignore) {}
     return null;
}

@Override
public void done() {
     Toolkit.getDefaultToolkit().beep();
     startButton.setEnabled(true);
    progressMonitor.setProgress(0);
}
}

public ProgressMonitorDemo() {
super(new BorderLayout());

//Create the demo's UI.
    startButton = new JButton("Start");
    startButton.setActionCommand("start");
    startButton.addActionListener(this);

     taskOutput = new JTextArea(5, 20);
     taskOutput.setMargin(new Insets(5,5,5,5));
     taskOutput.setEditable(false);

     add(startButton, BorderLayout.PAGE_START);
     add(new JScrollPane(taskOutput), BorderLayout.CENTER);
     setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

}


/**
* Invoked when the user presses the start button.
*/
public void actionPerformed(ActionEvent evt) {
progressMonitor = new ProgressMonitor(ProgressMonitorDemo.this,
"Running a Long Task",
"", 0, 100);
progressMonitor.setProgress(0);
task = new Task();
task.addPropertyChangeListener(this);
task.execute();
startButton.setEnabled(false);
}

/**
* Invoked when task's progress property changes.
*/
public void propertyChange(PropertyChangeEvent evt) {
if ("progress" == evt.getPropertyName() ) {
int progress = (Integer) evt.getNewValue();
progressMonitor.setProgress(progress);
String message =
String.format("Completed %d%%.\n", progress);
progressMonitor.setNote(message);
taskOutput.append(message);
if (progressMonitor.isCanceled() || task.isDone()) {
Toolkit.getDefaultToolkit().beep();
if (progressMonitor.isCanceled()) {
task.cancel(true);
taskOutput.append("Task canceled.\n");
} else {
taskOutput.append("Task completed.\n");
}
startButton.setEnabled(true);
}
}

}

/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("ProgressMonitorDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//Create and set up the content pane.
JComponent newContentPane = new ProgressMonitorDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);

//Display the window.
      frame.pack();
      frame.setVisible(true);
}

public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
    createAndShowGUI();
}
});
}
}
#5

Desculpe,
mais eu queria alguma coisa relacionada ao meu código…
e no exemplo você usou o ProgressMonitor, não encontrei exemplos dele
aqui no guj, seu código esta em Java 5 provavelmente…

alguem poderia me dar algum exemplo?

Muito obrigada tá?! valeu mesmo Rogerio…

#6