UML HelloWorld

[cyril vidal]

Hi,
I'm sorry this question doesn't deal directly with UML, but is extracted from UML book though, more exactly: the unified modeling language user gide from G.Booch, J.Rumbaugh, I.Jacobson.
Chapter 3 aims to present merely UML diagrams of the following HelloWorld applet:

import java.applet.Applet;
import java.awt.Graphics;
public class HelloWorldApplet extends Applet {
public void paint (Graphics g) {
g.drawString("Hello, World!", 10, 10);
}
}
  

For the sequence diagram, it's said that

Toolkit object calls one of its own operation (callbackLoop), which then calls the ComponentPeer's handleExpose operation.

I just wanted to make this sure, and then have the idea to use -Xprof command-line option with an application equivalent to above applet:

import java.awt.*;
import javax.swing.*;
public class HelloWorld extends JFrame {
  public static void main (String[] args){
      JFrame frame = new JFrame();
      frame.getContentPane().add(new Affichage());
      frame.setSize(30,40);
      frame.setVisible(true);
  }
 }
     
class Affichage extends Canvas {
public void paint(Graphics g) {
g.drawString("Hello, World!", 10, 10);
  }
}
  

There are many very interesting informations pounded on the output, but nothing about the callbackLoop or handleexpose methods.
How may i check these are effectly called during the process?
Thanks for your response,
CYril.