Validate Password

package ExerciseAgain;

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

public class ValidatePassword {
    private static int getLength(String input) {
        int length = 0;
        for (char letter : input.toCharArray()) {
            if (Character.isLetterOrDigit(letter)) {
                length++;
            }
        }
        return length;
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int number = Integer.parseInt(scanner.nextLine());
        String regex = "_.*[A-Z][A-Z0-9a-z]*[A-Z]_.*";
        Pattern pattern = Pattern.compile(regex);
        for (int i = 1; i <= number; i++) {
            String input = scanner.nextLine();
            int length = getLength(input);
            Matcher matcher = pattern.matcher(input);
            if (matcher.find() && length>=6) {
                String email = matcher.group();
                String name = email.replaceAll("_", "").replaceAll("\\.", "");
                String validPass = getGroup(name);
                System.out.println("Group: " + validPass);

            } else if (!matcher.find()) {
                System.out.println("Invalid pass!");
            }
        }
    }

    private static String getGroup(String name) {
        StringBuilder sb = new StringBuilder();
        int digit = 0;
        for (char letter : name.toCharArray()) {
            if (Character.isDigit(letter)) {
                digit++;
                sb.append(letter);
            }
        }
        if (digit == 0) {
            return "default";
        }
        String group = sb.toString();
        return group;
    }

}