Answer / raghuveer

update(Observable o,Object arg)
This method is called whenever the observed object is
changed. An application calls an Observable object's
notifyObservers method to have all the object's observers
notified of the change.
where:
o - the observable object.
arg - an argument passed to the notifyObservers method

Answer / mayank

The update() method is defined by the AWT and is
called when your applet has requested that a
portion of its window be redrawn. The problem is
that the default version of update() first fills
an applet with the default background colour and
then calls paint(). You can override the update()
method. The paint() in this case will simply call
update().

public void update(Graphic g) {
//Redisplay your window here.
}

public void paint(Graphics g) {
update(g); // call to the update()method.
}

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