Emoji Detector

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class EmojiDetector {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String digitRegex = "\\d";

        String regex = "(?<letters>([*]{2})[A-Z][a-z]{2,}([*]{2})|([:]{2})[A-Z][a-z]{2,}([:]{2}))";

        Pattern pattern = Pattern.compile(digitRegex);
        Pattern pattern2 = Pattern.compile(regex);

        String input = scanner.nextLine();

        int threshold = 1;

        List<String> emoji = new ArrayList<>();
        List<String> coolEmoji = new ArrayList<>();

        Matcher matcher2 = pattern.matcher(input);

        while (matcher2.find()) {
            int digit = Integer.parseInt(matcher2.group(0));
            threshold = threshold * digit;
        }
        Matcher matcher = pattern2.matcher(input);

        while (matcher.find()) {

            String letters = matcher.group("letters");

            int sumChar = 0;
            for (int i = 2; i < letters.length() - 2; i++) {
                char sign = letters.charAt(i);
                sumChar += (int)sign;
            }
            coolEmoji.add(letters);

            if (sumChar > threshold) {
                emoji.add(letters);
            }
        }

        System.out.printf("Cool threshold: %d%n", threshold);
        System.out.printf("%d emojis found in the text. The cool ones are:%n", coolEmoji.size());

        for (String element : emoji) {
            System.out.printf("%s%n", element);
        }
    }
}