pattern matcher problem

[shashanksworld]

import java.util.regex.*;
class test034
{
public static void main(String[] args)
{

String s="abd sduasdrnsab1dab5";
String p="\\w\\d";
Pattern pp=Pattern.compile(p);
Matcher m=pp.matcher(s);
boolean b=false;
//String ss=m.replaceAll("0");
//System.out.println(ss);
while(b=m.find())
{
System.out.println("match :"+m.group());

}

}
}
//
if I remove the comments then the the while lop does not print any thing..,,..
but the replaceAll method is not changing the original string but returning a new modified string.
please help..

[Steve11235]

Look at the API. The replaceAll() method is resetting the state of any matching. This may very well be the expected behavior.