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Stay up to date with this informative article. - পিসি হেল্পলাইন বিডি (বাংলাদেশ)

পিসি হেল্পলাইন বিডি (বাংলাদেশ) নিজে জানুন, অন্যকে জানান

Pogress Bar
Its an important feature in todays sofware development..
The following program is a java program,its a simple progress bar demo..you just need to do the following to run it by your own..
1)You must have java pre installed on your pc or you can download it
https://netbeans.org/downloads/start.html?platform=windows&lang=en&option=all
2)open NetBeans IDE 7.1.3 with Project name ProgressBarDemo2
3)copy the below code & paste it there
4)Right Click on the code & click on RUN
your application will start immediately.....

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

public class ProgressBarDemo2 extends JPanel
implements ActionListener,
PropertyChangeListener {

private JProgressBar progressBar;
private JButton startButton;
private JTextArea taskOutput;
private Task task;

class Task extends SwingWorker {
/*
* Main task. Executed in background thread.
*/

public Void doInBackground() {
Random random = new Random();
int progress = 0;
//Initialize progress property.
setProgress(0);
//Sleep for at least one second to simulate "startup".
try {
Thread.sleep(1000 + random.nextInt(2000));
} catch (InterruptedException ignore) {}
while (progress < 100) {
//Sleep for up to one second.
try {
Thread.sleep(random.nextInt(1000));
} catch (InterruptedException ignore) {}
//Make random progress.
progress += random.nextInt(10);
setProgress(Math.min(progress, 100));
}
return null;
}

/*
* Executed in event dispatch thread
*/
public void done() {
Toolkit.getDefaultToolkit().beep();
startButton.setEnabled(true);
taskOutput.append("Done!\n");
}
}

public ProgressBarDemo2() {
super(new BorderLayout());

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

progressBar = new JProgressBar(0, 100);
progressBar.setValue(0);

//Call setStringPainted now so that the progress bar height
//stays the same whether or not the string is shown.
progressBar.setStringPainted(true);

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

JPanel panel = new JPanel();
panel.add(startButton);
panel.add(progressBar);

add(panel, 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) {
progressBar.setIndeterminate(true);
startButton.setEnabled(false);
//Instances of javax.swing.SwingWorker are not reusuable, so
//we create new instances as needed.
task = new Task();
task.addPropertyChangeListener(this);
task.execute();
}

/*
* Invoked when task's progress property changes.
*/
public void propertyChange(PropertyChangeEvent evt) {
if ("progress" == evt.getPropertyName()) {
int progress = (Integer) evt.getNewValue();
progressBar.setIndeterminate(false);
progressBar.setValue(progress);
taskOutput.append(String.format(
"Completed %d%% of task.\n", progress));
}
}

/*
* Create the GUI and show it. As with all GUI code, this must
run
* on the event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("ProgressBarDemo2");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//Create and set up the content pane.
JComponent newContentPane = new ProgressBarDemo2();
newContentPane.setOpaque(true);
//newContentPane.setForeground(Color.red);
//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();
}
});
}
}

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