Person.java

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;

public class Person {
    private String firstName;
    private String lastName;
    private Integer dni;
    private LocalDate birthDate;
    private ArrayList<String> emails;
    private String cellphone;

    public Person() {
        this.emails = new ArrayList<String>();
    }

    public Person(String firstName, String lastName, Integer dni,
            LocalDate birthDate, ArrayList<String> emails, String cellphone) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.dni = dni;
        this.birthDate = birthDate;
        this.emails = emails;
        this.cellphone = cellphone;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Integer getDni() {
        return dni;
    }

    public void setDni(Integer dni) {
        this.dni = dni;
    }

    public LocalDate getBirthDate() {
        return birthDate;
    }

    public void setBirthDate(LocalDate birthDate) {
        this.birthDate = birthDate;
    }

    public ArrayList<String> getEmails() {
        return emails;
    }

    public String getEmailsStr() {
        StringBuilder emailsStr = new StringBuilder();
        for (String email : emails) {
            emailsStr.append("\n    " + email);
        }
        return emailsStr.toString();
    }

    public void setEmails(ArrayList<String> email) {
        this.emails = email;
    }

    public String getCellphone() {
        return cellphone;
    }

    public void setCellphone(String cellphone) {
        this.cellphone = cellphone;
    }

    public int calculateAge() {
        LocalDate now = LocalDate.now();
        int age = (int) ChronoUnit.YEARS.between(birthDate, now);
        return age;
    }


    public boolean bornInYearsRange(int start, int end) {
        return birthDate.isBefore(LocalDate.parse(end + "-12-31")) //31 de diciembre
                && birthDate.isAfter(LocalDate.parse(start + "-01-01")) ; //1 de febrero
    }

    @Override
    public String toString() {

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        String dateStr = this.getBirthDate().format(formatter);

        return  "______________________________________________"
                + "\nNombre: " + firstName
                + "\nApellido: " + lastName
                + "\nDni: " + dni
                + "\nFecha de nacimiento: " + dateStr
                + "\nEdad: " + calculateAge()
                + "\nNúmero de celular: " + cellphone
                + "\nCuentas de e-mails: " + emails.size() + getEmailsStr();
    }


}