HOW TO SHOW JLABEL IN JDIALOG WHILE MAIN CLASS IS SLEEPING? (CODE EDITED)

Question

I have done a code below and it is working but the only problem is when the main program start to sleep by use Thread.sleep(10000) for 10 secs and it will prompt out a JDialog contain JLabel inside it with message "Please wait.... program is sleeping.". And when the thread ends the JDialog will auto disappear and it back to the main program.
I am using TimerTask to run the JDialog while the main class is sleeping.
The problem is:
When the JDialog appear, it doesn't show the component so I only be able to view the JDialog window without contain any component. I already use container to add the component into JDialog but it still doesn't show. I only be able to see the JDialog window contain empty component when the main window is sleeping.
How to make the components also appear in the JDialog when the main program is sleeping?
Below is the code pls have a try:
public class testThread extends JFrame
public static void main(String args[])
new testThread();
public testThread()
* other code not related is here
// WHEN USER PRESS startThreadBtn it will make the application sleep for 15 secs and pop out JDialog window contain JLabel msg wrote "Please wait... program is sleeping"
JButton startThreadBtn = new JButton("Start Thread");
startThreadBtn.addActionListener
( new ActionListener()
public void actionPerformed(ActionEvent e)
try{
doTask a = new doTask();
java.util.Timer thisTimer = new java.util.Timer();
thisTimer.schedule(a, 0); // when this code executed, will pop out a JDialog containing JLabel message --> refer to class doTask
Thread.sleep(10000);
a.terminate()
thisTimer.cancel();
catch(InterruptedException ie)
ie.printStackTrace();
public class doTask extends TimerTask
JDialog infoDialog;
public void run()
infoDialog = new JDialog(true);
infoDialog.setTitle("Please Wait!!!");
Container c = infoDialog.getContentPane();
c.setLayout(new BorderLayout());
JLabel infoLbl = new JLabel("Please Wait... Program is sleeping!!!", JLabel.CENTER);
c.add(infoLbl, BorderLayout.CENTER);
infoDialog.setVisible(true);
public void terminate()
infoDialog.setVisible(false);
infoDialog.dispose();
Why I can not show the JLabel inside the JDialog? The JDialog window is opened but it contain empty component.
PLEASE HELP ME .... THIS IS VERY URGENT

Answer 1

I have the complete code and it is working. I can posted it here but it will be longer thats the reason why i shortened the code in here and displaying the important information.
The problem is the JDialog only will display the JLabel after the thread woke up. Thats mean it is too late for me to display the information. I need the JLabel containing the information to be displayed when the thread is sleeping....
Below is the complete code:
you can have a try to recompile it and u will understand what i mean. It is working and the only problem is JLabel component did not displayed in the JDialog.
Just copy the whole code into the txt file and save as testThread.java and recompile it. Inside the code has one inner class extends TimerTask call "doTask"
THE CODE START BELOW:
import java.util.*;
import java.lang.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class testThread extends JFrame
public static java.util.Timer thisTimer;
public static doTask a;
public static testThread tT;
public Container cMain;
public Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
public JButton exitBtn;
public JButton startThreadBtn;
/** Creates a new instance of testThread */
public static void main(String args[])
new testThread();
public testThread()
//System.out.println("Start to call JDialog");
tT = this;
int realW = (int)screenSize.getWidth();
int realH = (int)screenSize.getHeight();
int mainW = 500;
int mainH = 300;
exitBtn = new JButton("EXIT");
exitBtn.setBounds((int)((500-100)/2), (int)((300-50)/5), 100, 50);
exitBtn.addActionListener
new ActionListener()
public void actionPerformed(ActionEvent e)
System.exit(0);
startThreadBtn = new JButton("Start Thread");
startThreadBtn.setBounds((int)((500-200)/2), (int)((300-50)/5*4), 200, 50);
startThreadBtn.addActionListener
new ActionListener()
public void actionPerformed(ActionEvent e)
try
System.out.println("Start to call JDialog");
a = new doTask();
thisTimer = new java.util.Timer();
thisTimer.schedule(a, 0);
System.out.println("Thread start to sleep first 10 secs");
Thread.sleep(10000);
System.out.println("Thread start to sleep second 5 secs");
Thread.sleep(5000);
System.out.println("Thread Wake Up");
a.terminate();
thisTimer.cancel();
catch(InterruptedException ie)
ie.printStackTrace();
cMain = this.getContentPane();
cMain.setLayout(null);
cMain.add(exitBtn);
cMain.add(startThreadBtn);
setBounds((int)((realW-mainW)/2), (int)((realH-mainH)/2), mainW, mainH);
setVisible(true);
public class doTask extends TimerTask
JDialog infoDialog;
public void run()
System.out.println("TASK IS RUNNING");
int screenWidth = (int)screenSize.getWidth();
int screenHeight = (int)screenSize.getHeight();
int w = 300;
int h = 200;
infoDialog = new JDialog(tT, true);
infoDialog.setTitle("Please Wait!!!");
Container c = infoDialog.getContentPane();
c.setLayout(new BorderLayout());
JLabel infoLbl = new JLabel("Please Wait... Program is sleeping!!!", JLabel.CENTER);
c.add(infoLbl, BorderLayout.CENTER);
infoDialog.setBounds((int)((screenWidth-w)/2), (int)((screenHeight-h)/2), w, h);
infoDialog.setVisible(true);
public void terminate()
infoDialog.setVisible(false);
infoDialog.dispose();
this.cancel();
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