Image is Flickering----Please help

Question

I have one hand image. I am drawing polygon above each finger.
Whenever the user clicks on particular finger, we are changing the color of that polygon.
We are changing the colors of the fingers(polygons) based on the database value when some functionalty is invoked. We are updating this color in PaintComponent of JPanel. The colors are flickering some time.
Please help.
Thanks in Advance.

Answer 1

For drawing your component the best of all would be using Canvas component and double buffering.
JPanel and othen Swing components using its own methods for paint and not necessarily draw components how would you like.
Example:
<code>
class MyPainter extends Canvas {
Image hand = ...;
public void update(Graphics g) {
this.paint(g);
public void paint(Graphics g) {
Dimension size = this.getSize();
Image painter = createImage(size.width, size.height);
Graphics g2 = painter.getGraphics();
g2.drawImage(hand, 0, 0, this);
g2.drawPoligon(...);
g.drawImage(g2, 0, 0, this);
</code>
If you make applet you must cleat graphics g2 and image painter.