import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MatcherGroupCountExample {
public static void main(String args[]) {
Pattern p = Pattern.compile("B(ond)");
String candidateString = "My name is Bond. James Bond.";
Matcher matcher = p.matcher(candidateString);
int numberOfGroups = matcher.groupCount();
System.out.println("numberOfGroups =" + numberOfGroups);
}
}