Probleme java

abstract class Personne {
    private String nom;
    private String prenom;
    private int age;

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

    public String getNom() {
        return nom;
    }

    public void setNom(String nom) {
        this.nom = nom;
    }

    public String getPrenom() {
        return prenom;
    }

    public void setPrenom(String prenom) {
        this.prenom = prenom;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

public class Etudiant extends Personne {
    private String nom;
    private String prenom;
    private String classe;
    private int age;

    public Etudiant(String nom, String prenom, String classe, int age) {
        super(nom, prenom, age);
        this.nom = nom;
        this.prenom = prenom;
        this.classe = classe;
        this.age = age;
    }

    public String getClasse() {
        return classe;
    }

    public void setClasse(String classe) {
        this.classe = classe;
    }

    @Override
    public String toString() {
        return "Etudiant{" +
                "nom='" + nom + '\'' +
                ", prenom='" + prenom + '\'' +
                ", classe='" + classe + '\'' +
                ", age=" + age +
                '}';
    }
}

public class Enseignant extends Personne {
    private String nom;
    private String prenom;
    private String matiere;
    private int age;
    private char classeTuteur;

    public Enseignant(String nom, String prenom, String matiere, int age, char classeTuteur) {
        super(nom, prenom, age);
        this.nom = nom;
        this.prenom = prenom;
        this.matiere = matiere;
        this.age = age;
        this.classeTuteur = classeTuteur;
    }

    public String getMatiere() {
        return matiere;
    }

    public void setMatiere(String matiere) {
        this.matiere = matiere;
    }

    public char getClasseTuteur() {
        return classeTuteur;
    }

    public void setClasseTuteur(char classeTuteur) {
        this.classeTuteur = classeTuteur;
    }

    @Override
    public String toString() {
        return "Enseignant{" +
                "nom='" + nom + '\'' +
                ", prenom='" + prenom + '\'' +
                ", matiere='" + matiere + '\'' +
                ", age=" + age +
                ", classeTuteur='" + classeTuteur + '\'' +
                '}';
    }
}

public class Launcher {
    public static void main(String[] args) {
        Personne[] tabPers = new Personne[5];

        tabPers[0] = new Enseignant("Durand", "Jacques", "Maths", 32, 'C');
        tabPers[1] = new Enseignant("Dupont", "Pierre", "Sciences", 46, 'A');
        tabPers[2] = new Etudiant("Peront", "Alex", "6A", 12);
        tabPers[3] = new Etudiant("Dubanc", "Sophie", "5C", 13);
        tabPers[4] = new Etudiant("Pusto", "Miguel", "6B", 11);

        for (Personne p : tabPers)
            System.out.println(p);

    }
}