The execution time of init() and start().

Hi everybody,
I am reading The Complete Reference Java 2 (1999).
It says "Whereas init() is called once -- the first time an applet is loaded -- start() is called each time an applet's HTML document is displayed onscreen. So, if a user leaves a web page and comes back, the applet resumes execution at start()"
According to the above words, I think an applet is initialized at the point of starting the HTML file containing the applet for the first time, i.e., init() is called. At the same time, start() is called following init(). Then if input a URL to start another HTML file and press "Back" button of the browser, start() should be called once more. Implicitly, only one instance of that applet is created and it exists until the user closes the browser.
I tried to test it using the code as bellow. In init(), String msg is initialized using current time. Instance variable i is defined with default value 1 and increased by 1 in start(). I supposed the time contained in msg remained constant and variable i increased one by one while going to a different URL and coming back repeatly.
Unfortunately, the time changed each time when coming back from another URL and i did not increase. It seems that a new instance (object) is created at that point. If so, differenciating init() and start() makes no sense. I am confused with it . Can anybody give me some further information? Thank you very much.
Source Code:
<code>
import java.awt.*;
import java.applet.*;
import java.util.*;
<applet code="TestApplet" width=500 height=50>
</applet>
public class TestApplet extends Applet {
String msg;
int i = 1;
// Set colors and initialize thread.
public void init() {
setBackground(Color.cyan);
setForeground(Color.red);
msg = " A Simple Moving Banner." + Calendar.getInstance().getTime();
// Start thread
public void start() {
msg = msg + " [" + i + "]";
i ++;
repaint();
// Display the banner.
public void paint(Graphics g) {
g.drawString(msg, 50, 30);
</code>
HTML Sample:
<code>
<html>
<body>
<applet code="TestApplet" width=500 height=50>
</applet>
</body>
</html>
</code>

try this :
public class TestApplet extends Applet {
String msg;
static int i = 1;

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