如何获取关联的namedGroup和输入值？matcher.group()

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexExample {
    public static void main(String[] args) {
        String regex = "(?<group1>\\w+)(?<group2>\\d+)";
        String input = "abc123";

        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);

        if (matcher.find()) {
            String group1 = matcher.group("group1");
            String group2 = matcher.group("group2");

            System.out.println("Group 1: " + group1);
            System.out.println("Group 2: " + group2);
        }
    }
}

Group 1: abc
Group 2: 123