import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MatcherAppendReplacementGroupExample {
public static void main(String args[]) {
Pattern p = Pattern.compile("(James) (Bond)");
StringBuffer sb = new StringBuffer();
String candidateString = "My name is Bond. James Bond.";
String replacement = "$1 Waldo $2";
Matcher matcher = p.matcher(candidateString);
matcher.find();
matcher.appendReplacement(sb, replacement);
String msg = sb.toString();
System.out.println(msg);
}
}