/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
	final String regex = "[#]\\w*\\d*\\W\\s*";
final String string = "oi tudo bem como vai #01?";
 
final Pattern pattern = Pattern.compile(regex);
final Matcher matcher = pattern.matcher(string);
 
while (matcher.find()) {
    System.out.println("Full match: " + matcher.group(0));
    for (int i = 1; i <= matcher.groupCount(); i++) {
        System.out.println("Group " + i + ": " + matcher.group(i));
    }
}
	}
}

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