Regex Problem from Kathy & Sierra Book

[Srinivas Katta]

Hi All,

I have the below Code from Chapter 6 of K&B Book

import java.util.regex.*;
class Regex2 {
public static void main(String[] args) {
Pattern p = Pattern.compile(args[0]);
Matcher m = p.matcher(args[1]);
boolean b = false;
while(b = m.find()) {
System.out.print(m.start() + m.group());
}
}
}
And the command line:
java Regex2 "\d*" ab34ef

As per my understanding the Result should be 0123445 but as per the book the result is 01234456

I don't Understand from where the 6 has come as source "ab34ef" is of 6 characters with index position upto 5 only

Please explain me if anybody understand this well

Thanks
Srinivas

[Ulf Dittmer]

That's a FAQ; check the ScjpFaq for an explanation.

[Srinivas Katta]

Hello Ulf Dittmer,

Thanks for Quick response but this won't clarify my Query. I posted this Question after referring all available documentation. If you can understand thr problem please explain

Thanks
Srinivas

[Ulf Dittmer]

I think you need to read the ScjpFaq a bit more carefully. You apparently missed that it has a lengthy writeup about exactly this question. So comprehensive, in fact, that it even contains a graphic that explains what's going on. If you have actually seen that, please tell us what you still don't understand, so that we can improve that FAQ entry.