Problem with repaint() in JPanel

Question

Hi,
This is the problem: I cyclically call the repaint()-method but there is no effect of it.
When does it appear: The problem occurs by calling the repaint()-method of a JPanel -class.
This is what i am doing: The repaint() is called from a different class which is my GUI. I do this call in an endless loop which is done within a Thread.
I tried to add a KeyListener to the JPanel-class and there I called the repaint()-method when i press a Key. Then the Panel is repainted.
so I implemented a "callRepaint"-method in the JPanel-class that does nothing else than call repaint() (just like the keyPressed()-method does). But when i cyclically call this "callRepaint"-method from my GUI nothing happens.
Now a few codedetails:
// JPanel-class contains:
int i = 0;
public void callRepaint(){
                repaint();
public void paintComponent(Graphics g){
        super.paintComponent(g);
        g.drawLine(i++,0,200,200);
public void keyPressed(KeyEvent e) {
        repaint();                       // This is working
//GUI-class contains:
// This method is called cyclically
public void draw() {
              lnkJPanelclass.repaint();             // This calling didn't work
              // lnkJPanelclass.callRepaint();  // This calling didn't work     
Thanks for your advices in advance!
Cheers spike

Answer 1

@ARafique:
This works fine:
import java.awt.*;
import java.awt.event.*;
import java.util.Date;
import javax.swing.*;
public class Test extends JFrame implements ActionListener{
    private JTextField label;
    private Timer timer;
    private Container cont;
    public Test() {
        label = new JTextField("",0);
        timer = new Timer(1000,this);
        cont = getContentPane();
        cont.add(label);
        setSize(250,70);
        setDefaultCloseOperation(3);
        setVisible(true);
        timer.start();
    public void actionPerformed(ActionEvent e){
        label.setText(new Date(System.currentTimeMillis()).toString());
    public static void main(String[] args){
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Test();
}no repaint()/revalidate() needed