Does repaint() not call paint()?

Question

I try to create a application where pictures are switching randomly one after another. User can specific how long this randomly displaying image application run. Then when the user click "start", the image will randomly change until it is timeout. As far as I know, I have this part finish.
However, I want to add another part: when user click start a small clock display on the panel the amount of second counting down. However, when I set the timer to repaint() the application, it does not get in the paint() method. Below are my code, please help. Since my code are a bit long, I will post my entire code on a separate thread, hope that the admin and mod dont mind.
This is where I implement paint(), and I click on the button, I repaint the panel
public void paint(Graphics g)
        System.out.println("Inside Graphics");
        //Create an instance of Graphics2D
        Graphics2D g2D = (Graphics2D)g;
        g2D.setPaint(Color.RED);
        g2D.setStroke(stroke);
        DigitalNumber number = new DigitalNumber(numberX,numberY,numberSize,numberGap,Color.red, Color.white);
        //Get the time that the user input to the field
        String time = tf.getText();
        float locX = numberX;
        float locY = numberY;
        //Start drawing the number onto the panel
        for(int i=0; i<time.length(); i++){
             number.drawNumber(Integer.parseInt(Character.toString(time.charAt(i))), g2D);
             locX += numberSize + numberGap;
             number.setLocation(locX, locY);
private void createBtnPanel() {
      JButton startBtn = new JButton("Start");
      JButton stopBtn = new JButton("Stop");
      startBtn.addActionListener(new StartBtnListener() );
      stopBtn.addActionListener(new StopBtnListener());
      btnPanel.add(startBtn, BUTTON_PANEL);
      btnPanel.add(stopBtn, BUTTON_PANEL);
private class StartBtnListener implements ActionListener {
      public void actionPerformed(ActionEvent e) {
         //get the time from the user input
         String input = tf.getText();
         numberOfMilliSeconds = Integer.parseInt(input)*1000;
         //get the current time
         startTime = System.currentTimeMillis();
         java.util.Timer clockTimer = new java.util.Timer();
         java.util.TimerTask task = new java.util.TimerTask()
             public void run()
                  mainPanel.repaint();
         clockTimer.schedule(task, 0L, 1000L);
         rotatePictureTimer.start();
   }

Answer 1

I am sorry. However, even though I try to make my code self contained, it still too long to post here. It is the DigitalNumber.java that contain all the strokes for draw the number is all too long. But I can tell you that DigitalNumber.java is worked because I wrote a digital clock before, and it worked. But below is the link to my DigitalNumber.java if u guy want to look at it
http://www.vanloi-ii.com/code/code.rar
Here is my code for DisplayImage.java in self-contain format. Thank you
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.*;
public class DisplayImage{
   private static final Dimension MAIN_SIZE = new Dimension(250,250);
   private static final String BUTTON_PANEL = "Button Panel";
   private JPanel mainPanel = new JPanel();
   private JPanel btnPanel = new JPanel();
   private JPanel tfPanel = new JPanel();
   private BorderLayout borderlayout = new BorderLayout();
   private JTextField tf;
   BasicStroke stroke = new BasicStroke(5f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL);
   private float numberX = 100f;
   private float numberY = 100f;
   private float numberSize = 10f;
   private float numberGap = 2f;
   public DisplayImage() {
      mainPanel.setLayout(borderlayout);
      mainPanel.setPreferredSize(MAIN_SIZE);
      createTFPanel();
      createBtnPanel();
      mainPanel.add(tfPanel, BorderLayout.NORTH);
      mainPanel.add(btnPanel, BorderLayout.SOUTH);
   public void paint(Graphics g)
        System.out.println("Inside Graphics");
        //Create an instance of Graphics2D
        Graphics2D g2D = (Graphics2D)g;
        g2D.setPaint(Color.RED);
        g2D.setStroke(stroke);
        DigitalNumber number = new DigitalNumber(numberX,numberY,numberSize,numberGap,Color.red, Color.white);
        //Get the time that the user input to the field
        String time = tf.getText();
        float locX = numberX;
        float locY = numberY;
        //Start drawing the number onto the panel
        for(int i=0; i<time.length(); i++){
             number.drawNumber(Integer.parseInt(Character.toString(time.charAt(i))), g2D);
             locX += numberSize + numberGap;
             number.setLocation(locX, locY);
   private void createBtnPanel() {
      JButton startBtn = new JButton("Start");     
      startBtn.addActionListener(new StartBtnListener() );    
      btnPanel.add(startBtn, BUTTON_PANEL);
   private void createTFPanel() {
      JLabel l = new JLabel("Enter Number of Seconds: ");
      tf = new JTextField(3);
      tfPanel.add(l);
      tfPanel.add(tf);
   private class StartBtnListener implements ActionListener {
      public void actionPerformed(ActionEvent e) {
         //get the time from the user input
         java.util.Timer clockTimer = new java.util.Timer();
         java.util.TimerTask task = new java.util.TimerTask()
             public void run()
                  System.out.println("TimerTask");
                  mainPanel.repaint();
         clockTimer.schedule(task, 0L, 1000L);     
   private static void createAndShowUI() {
       DisplayImage displayImage = new DisplayImage();
      JFrame frame = new JFrame("Display Image");
      frame.getContentPane().add(displayImage.mainPanel);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setBackground(Color.white);
      frame.pack();
      frame.setLocationRelativeTo(null);  //center the windows
      frame.setVisible(true);
   public static void main (String args[]) {
      java.awt.EventQueue.invokeLater(new Runnable(){
         public void run() {
            createAndShowUI();
}Edited by: KingdomHeart on Feb 22, 2009 6:12 PM