ProgressBar

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Toolkit;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JProgressBar;

import javax.swing.JWindow;

import javax.swing.UIManager;

/**
 * 
 */
private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JLabel jLabel = null;
private JProgressBar jProgressBar = null;


/**
 * This is the default constructor
 */
public Progress() {
	super();
	initialize();	
}

/**
Método Construtor
 */
private void initialize() {
	this.setSize(349, 282);
	
	UIManager.put("ProgressBar.selectionBackground", Color.black);
	UIManager.put("ProgressBar.selectionForeground", Color.white);
	UIManager.put("ProgressBar.foreground", new Color(8,32,128));
	UIManager.put("ProgressBar.cellLength", new Integer(5));
	UIManager.put("ProgressBar.cellSpacing", new Integer(1));
	
	Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
	Dimension size = getSize();
	
	if (size.width > screenSize.width)
		size.width = screenSize.width;
	
	if (size.height > screenSize.height)
		size.height = screenSize.height;
	
	this.setLocation((screenSize.width - size.width) / 2, (screenSize.height - size.height) / 2);
	
	this.setContentPane(getJContentPane());
}

/**
Inicializa a Label
 */
private JPanel getJContentPane() {
	if (jContentPane == null) {
		jLabel = new JLabel();
		jLabel.setSize(new java.awt.Dimension(349,262));
		jLabel.setLocation(new java.awt.Point(0,0));
		jContentPane = new JPanel();
		jContentPane.setLayout(null);
		jContentPane.add(jLabel, null);
		jContentPane.add(getJProgressBar(), null);
	}
	return jContentPane;
}

/**
 Inicializa a ProgressBar
 */
private JProgressBar getJProgressBar() {
	if (jProgressBar == null) {
		jProgressBar = new JProgressBar();
		jProgressBar.setBounds(new java.awt.Rectangle(0,262,349,20));		
		jProgressBar.setMinimum(0);
		jProgressBar.setMaximum(100);
		jProgressBar.setStringPainted(true);
		
	}
	return jProgressBar;
}

/**
 * @version 1.00 1999-07-17
 * @author Cay Horstmann
 */

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

public class ProgressBarTest {  
   public static void main(String[] args)
   {  JFrame frame = new ProgressBarFrame();
      frame.show();
   }
}

class ProgressBarFrame extends JFrame
{  public ProgressBarFrame()
   {  setTitle("ProgressBarTest");
      setSize(300, 200);
      addWindowListener(new WindowAdapter()
         {  public void windowClosing(WindowEvent e)
            {  System.exit(0);
            }
         } );

      Container contentPane = getContentPane();

      // this text area holds the activity output
      textArea = new JTextArea();

      // set up panel with button and progress bar

      JPanel panel = new JPanel();
      startButton = new JButton("Start");
      progressBar = new JProgressBar();
      progressBar.setStringPainted(true);
      panel.add(startButton);
      panel.add(progressBar);
      contentPane.add(new JScrollPane(textArea), "Center");
      contentPane.add(panel, "South");

      // set up the button action

      startButton.addActionListener(
         new ActionListener()
            {  public void actionPerformed(ActionEvent event)
               {  progressBar.setMaximum(1000);
                  activity = new SimulatedActivity(1000);
                  activity.start();
                  activityMonitor.start();
                  startButton.setEnabled(false);
               }
            });


      // set up the timer action

      activityMonitor = new javax.swing.Timer(500,
         new ActionListener()
            {  public void actionPerformed(ActionEvent event)
               {  int current = activity.getCurrent();

                  // show progress
                  textArea.append(current + "\n");
                  progressBar.setValue(current);

                  // check if task is completed
                  if (current == activity.getTarget())
                  {  activityMonitor.stop();
                     startButton.setEnabled(true);
                  }
               }
            });
   }

   private javax.swing.Timer activityMonitor;
   private JButton startButton;
   private JProgressBar progressBar;
   private JTextArea textArea;
   private SimulatedActivity activity;
}

class SimulatedActivity extends Thread
{  public SimulatedActivity(int t)
   {  current = 0;
      target = t;
   }

   public int getTarget()
   {  return target;
   }

   public int getCurrent()
   {  return current;
   }

   public void run()
   {  while (current < target && !interrupted())
      {  try
         {  sleep(100);
         }
         catch(InterruptedException e)
         {  return;
         }
         current++;
      }
   }

   private int current;
   private int target;
}