PaintComponent is slow - help

Question

I have the following code for painting a image on to screen. I keep updating the image continuously. This application is slow.
I read that using active rendering/ BufferStrategy will be faster. but i am not able to find any examples for the same but i could not find any examples for the same.
If i put the same code in paint() then there is flickering ..
Appreciate your comments on how i could increase the performance of the application.
Thanks in advance.
<code>
import java.awt.*;
import javax.swing.JPanel;
public class PaintPanel extends JPanel
public PaintPanel()
setPreferredSize(new Dimension(800, 600));
revalidate();
objInsets = getInsets();
iHeight = getHeight();
iWidth = getWidth();
iPaintableWidth = iWidth - objInsets.right - objInsets.left - 1;
iPaintableHeight = iHeight - objInsets.top - objInsets.bottom -1;
boolStartImageDisplay=true;
repaint();
public void updatePicture(PictData pictData)
this.pictData = pictData;
int w = pictData.getRight() - pictData.getLeft() + 1;
int h = pictData.getBottom() - pictData.getTop() + 1;
int y = pictData.getTop();
int x = pictData.getLeft();
repaint(x,y,w,h);
public void paintComponent(Graphics g)
super.paintComponent(g);
// Start Image Display so paint the background BLACK.
if (boolStartImageDisplay == true) {
g.setColor(Color.BLUE);
g.fillRect(objInsets.left, objInsets.top, iPaintableWidth, iPaintableHeight);
boolStartImageDisplay = false;
} else if (this.pictData != null) {
if (this.pictData != null) {
this.m_image = MyUtil.getImage(this.pictData); //get the image from the pictData object.
this.pictData = null;
g.drawImage(this.m_image, objInsets.left, objInsets.top, this);
private Insets objInsets = getInsets();
private int iHeight = getHeight();
private int iWidth = getWidth();
private int iPaintableWidth = iWidth - objInsets.right - objInsets.left - 1;
private int iPaintableHeight = iHeight - objInsets.top - objInsets.bottom -1;
private PictData pictData = null;
private boolean boolStartImageDisplay=false;
private Image m_image = null;
public static void main(String args[]) {
java.awt.Frame f = new java.awt.Frame();
PaintPanel c = new PaintPanel ();
JScrollPane scroll = new JScrollPane (c);
f.add("Center", scroll );
f.setTitle("My PaintPanel");
c.setSize(800, 600);
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
f.pack();
f.show();
try {
c.repaint();
} catch (Exception e) {
e.printStackTrace();
</code>

Answer 1

"I keep updating the image continuously"What? I guess your loading images from somewhere and
then calling the repaint method on the frame. This is
most likely the slow part of your program. Look at the
MemoryImageSource object. In the javadoc there's some
code animating an image included.I get the stream of data from a different machine, from which i create a BufferedImage and use this image to drawImage(..)
in normal conditions the performance is ok but When the mouse is moved continuously the image does not get updated soon enough. I guess this is because both the (mouse event and the image updation) runs on the same thread - eventdispatcher.