Encapsulation: getters and setters

Core exercise

Make the three attributes of Personne private, then add the getters getNom(), getPrenom(), getAge() and the setters setNom(String), setPrenom(String), setAge(int). setAge must reject a negative age (it then leaves the age unchanged).

A workshop goes here: you write and run code in it. It requires JavaScript.

Starting code

Personne.java

public class Personne {

    // TODO : passer ces attributs en private
    String nom;
    String prenom;
    int age;

    public Personne(String nom, String prenom, int age) {
        this.nom = nom;
        this.prenom = prenom;
        this.age = age;
    }

    // TODO : getNom, getPrenom, getAge

    // TODO : setNom, setPrenom, setAge (qui refuse un age negatif)

    public void afficherDetails() {
        System.out.println(prenom + " " + nom + ", " + age + " ans");
    }
}

Exercices.java

public class Exercices {

    public static void main(String[] args) {
        // Une fois les getters et setters ecrits, remplacez ces lignes par :
        //     Personne p = new Personne("Dupont", "Jean", 18);
        //     p.setAge(-5);
        //     System.out.println("age apres setAge(-5) : " + p.getAge());
        System.out.println("Completez Personne.java, puis lancez Verifier.");
    }
}

The core exercise is validated in the workshop, which requires JavaScript.

Hint 1

private forbids access from outside the class: it is the class itself that guarantees its data remain valid. That is the whole point of the filter in setAge.