JProgressBarimport java.awt.*; import java.awt.event.*; import javax.swing.*; import java.beans.*; import java.util.Random;public class ProgressBarDemo extends JPanel implements ActionListener, PropertyChangeListener { private JProgressBar progressBar; private JButton startButton; private JTextArea taskOutput; private Task task; class Task extends SwingWorker<Void, Void> { /* * Main task. Executed in background thread. */ @Override public Void doInBackground() { Random random = new Random(); int progress = 0; //Initialize progress property. setProgress(0); 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 dispatching thread */ @Override public void done() { Toolkit.getDefaultToolkit().beep(); startButton.setEnabled(true); setCursor(null); //turn off the wait cursor taskOutput.append("Done!\n"); } } public ProgressBarDemo() { 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); 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) { startButton.setEnabled(false); setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR)); //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.setValue(progress); taskOutput.append(String.format( "Completed %d%% of task.\n", task.getProgress())); } } /** * 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("ProgressBarDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. JComponent newContentPane = new ProgressBarDemo(); 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(); } }); } }
import java.awt.event.*;
import javax.swing.*;
import java.beans.*;
import java.util.Random;public class ProgressBarDemo extends JPanel
implements ActionListener,
PropertyChangeListener { private JProgressBar progressBar;
private JButton startButton;
private JTextArea taskOutput;
private Task task; class Task extends SwingWorker<Void, Void> {
/*
* Main task. Executed in background thread.
*/
@Override
public Void doInBackground() {
Random random = new Random();
int progress = 0;
//Initialize progress property.
setProgress(0);
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 dispatching thread
*/
@Override
public void done() {
Toolkit.getDefaultToolkit().beep();
startButton.setEnabled(true);
setCursor(null); //turn off the wait cursor
taskOutput.append("Done!\n");
}
} public ProgressBarDemo() {
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);
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) {
startButton.setEnabled(false);
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
//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.setValue(progress);
taskOutput.append(String.format(
"Completed %d%% of task.\n", task.getProgress()));
}
}
/**
* 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("ProgressBarDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane.
JComponent newContentPane = new ProgressBarDemo();
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();
}
});
}
}
<html>
<head>
<title>渐变效果进度条</title>
<script language="javascript">
var _Hex = Array("00","01","02","03","04","05","06","07","08","09",
"0A","0B","0C","0D","0E","0F","10","11","12","13","14","15","16","17","18","19",
"1A","1B","1C","1D","1E","1F","20","21","22","23","24","25","26","27","28","29",
"2A","2B","2C","2D","2E","2F","30","31","32","33","34","35","36","37","38","39",
"3A","3B","3C","3D","3E","3F","40","41","42","43","44","45","46","47","48","49",
"4A","4B","4C","4D","4E","4F","50","51","52","53","54","55","56","57","58","59",
"5A","5B","5C","5D","5E","5F","60","61","62","63","64","65","66","67","68","69",
"6A","6B","6C","6D","6E","6F","70","71","72","73","74","75","76","77","78","79",
"7A","7B","7C","7D","7E","7F","80","81","82","83","84","85","86","87","88","89",
"8A","8B","8C","8D","8E","8F","90","91","92","93","94","95","96","97","98","99",
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"CA","CB","CC","CD","CE","CF","D0","D1","D2","D3","D4","D5","D6","D7","D8","D9",
"DA","DB","DC","DD","DE","DF","E0","E1","E2","E3","E4","E5","E6","E7","E8","E9",
"EA","EB","EC","ED","EE","EF","F0","F1","F2","F3","F4","F5","F6","F7","F8","F9",
"FA","FB","FC","FD","FE","FF");
function go()
{
setTimeout('start();',100);
}
var i=0;
function start()
{
if(i++<256)
{
ps.innerHTML += "<span style='width:1px;background-color:#FF"+_Hex[256-i]+"00;'>";
bn.innerHTML = Math.floor(i/2.56)+"%";
setTimeout('start();',10);
}
}
</script>
<style type="text/css">
#ps {
background-color:#FFFF00;
width:256px;
margin: 1px;
float:left;
}
#bn {
width:39px;
margin: 1px;
float:right;
text-align:center;
color:#FFFFFF;
font-family:Arial;
font-size:13px;
}
</style>
</head>
<body>
<div style="background-color:black;width:300px;height:20px;"><div id="ps"></div><div id="bn"></div></div><br><br>
<input type="button" value="go" onclick="go()" />
</body>
</html>
http://blog.csdn.net/wangsswei/archive/2009/01/06/3720373.aspx