Component visibility in the screen,

Question

Hi
I'm facing a problem in the visibility of the component.
My need is to identify the component is in visibility or not.
ex: In a panel, i'm trying to change the location of the label , at a stage the label gets moved to end and the label is not in the screen in display.
How could i know the label is currently showing in view or not..
is there method to identify the label in view or not ??
regards
rathinam.

Answer 1

Hi thanks for your reply.
here i pasted the sample program.
let me know the solutions.
For your information, i'm creating a stock ticker component.
package table;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class TickerTesting extends JFrame {
JFrame fTickerFrame;
JPanel fTtickerpanel;
List fArray;
public TickerTesting() {
fTickerFrame = new JFrame( "Ticker" );
fTickerFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
fTickerFrame.setSize( new Dimension( 120, 40 ) );
JPanel panel = new JPanel();
panel.add( new Ticker( ) );
fTickerFrame.getContentPane().add( panel, BorderLayout.CENTER );
fTickerFrame.pack();
fTickerFrame.setVisible( true );
private class Ticker extends JPanel { // private JPanel panel;
private boolean paused;
public Ticker() {
MouseListener listener = new MouseAdapter() {
public void mouseEntered(MouseEvent event) {
paused = true;
public void mouseExited(MouseEvent event) {
paused = false;
addMouseListener( listener );
fTtickerpanel = new JPanel();
fTtickerpanel.addMouseListener( listener );
fTtickerpanel.setPreferredSize(new Dimension(500,50));
final TickerLabel label1 = new TickerLabel();
label1.setText("1     2     3     4     5     6     7     8     9");
fTtickerpanel.add( label1 );
label1.setBackground(Color.RED);
label1.setOpaque(true);
fTtickerpanel.setLocation( 0, 0 );
fTtickerpanel.setBackground(Color.WHITE);
fTtickerpanel.setOpaque(true);
add( fTtickerpanel );
paused = false;
new Thread( new Runnable() {
public void run() {
while ( true ) {
if ( !paused ) {
     int x = label1.getX() - 1;
if ( x < -label1.getWidth() ) {
x = getWidth();
label1.setLocation( x, 0 );
try {
Thread.sleep( 20 );
} catch ( InterruptedException exception ) {
exception.printStackTrace();
} ).start();
public Dimension getPreferredSize() {
Dimension preferredSizeOfPanel = fTtickerpanel.getPreferredSize();
return new Dimension( preferredSizeOfPanel.width / 2,
preferredSizeOfPanel.height );
class TickerLabel extends JLabel {
public TickerLabel() {
setForeground( Color.BLUE );
public String toString() {
return getText();
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater( new Runnable() {
public void run() {
new TickerTesting();
}