passwordvalidator

package com.example.project;

public class PasswordValidator {

    private int grade;
    private int MINIMUM_LENGTH_OF_PASSWORD = 8;

    /**
     * Determines strength of an entered password. Can be changed and/or modified.
     * @param pw User input.
     * @return int grade - used for displaying password strength.
     */
    public int validate(String pw) {
            boolean length = false;
            boolean upperCase = false;
            boolean lowerCase = false;
            boolean number = false;

            if(pw.length() > MINIMUM_LENGTH_OF_PASSWORD) {
                System.out.println(pw);
                length = true;
                for (int i = 0; i < pw.length(); i++) {
                    char a = pw.charAt(i);
                    if (Character.isUpperCase(a)) {
                        upperCase = true;
                    }
                    if (Character.isDigit(a)) {
                        number = true;
                    }
                    if (Character.isLowerCase(a)) {
                        lowerCase = true;
                    }
                }
            }

            if (length && upperCase && number && lowerCase){
                grade = 4;
            } else if(length && upperCase && lowerCase || length && number && lowerCase || length && number && upperCase){
                grade = 3;
            } else if(length && (upperCase || number || lowerCase)) {
                grade = 2;
            }else{
                grade = 1;
            }
            return grade;
    }
}