O4. Password Validator

package ExerciseMethoods;

import java.util.Scanner;

public class O4PasswordValidator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String password = scanner.nextLine();

        if (between6to10Characters(password)) {
            System.out.println("Password must be between 6 and 10 characters");
        }
        if (onlyLettersAndDigits(password)) {
            System.out.println("Password must consist only of letters and digits");
        }
        if (mustHave2Digits(password)) {
            System.out.println("Password must have at least 2 digits");

        }
        if (!onlyLettersAndDigits(password) && !between6to10Characters(password) && !mustHave2Digits(password)) {
            System.out.println("Password is valid");
        }
    }

    public static boolean between6to10Characters(String password) {
        boolean ok = false;
        int total = password.length();
        if (total < 6 || total > 10) {
            ok = true;
        }
        return ok;
    }

    public static boolean onlyLettersAndDigits(String password) {
        boolean ok = false;
        int invalid = 0;
        for (int i = 0; i < password.length(); i++) {
            int element = password.charAt(i);
            if (element < 48 || element > 57 && element < 65 || element > 90 && element < 97 || element > 122) {
                invalid += 1;
            }
        }
        if (invalid > 0) {
            ok = true;
        }
        return ok;
    }

    public static boolean mustHave2Digits(String password) {
        boolean ok = false;
        int digits = 0;
        for (int i = 0; i < password.length(); i++) {
            int element = password.charAt(i);
            if (element >= 48 && element <= 57) {
                digits += 1;
            }
        }
        if (digits < 2) {
            ok = true;
        }
        return ok;
    }
}