Maps and classes

AJavaFile.java

class Etudiant {
  public final String nom;
  public final String prenom;
  public final double note1;
  public final double note2;
  public final double note3;

  public Etudiant(String nom, String prenom, double note1, double note2, double note3) {
    this.nom = nom;
    this.prenom = prenom;
    this.note1 = note1;
    this.note2 = note2;
    this.note3 = note3;
  }
}

class Note {
  public final double note;

  public Note(double note) {
    this.note = note;
  }
}

class AutreEtudiant {
  public final String nom;
  public final String prenom;
  public final List<Note> notes;

  public AutreEtudiant(String nom, String prenom, List<Note> notes) {
    this.nom = nom;
    this.prenom = prenom;
    this.notes = notes;
  }
}

Map<String, Object> etudiant = Map.of("nom", "Geiser", "prenom", "Arnaud", "note1",
    3.5, "note2", 5, "note3", 6);

etudiant.get("nom"); // => Geiser
etudiant.get("prenom"); // => Arnaud
etudiant.get("note1"); // => 3.5
etudiant.get("note2"); // => 5
etudiant.get("noImmatriculation"); // => null

Etudiant etudiant2 = new Etudiant("Geiser", "Arnaud", 3.5, 5, 6);
etudiant2.nom; // => Geiser
etudiant2.prenom; // => Arnaud
etudiant2.note1; // => 3.5
etudiant2.note2; // => 5
etudiant2.noImmatriculation; // => not compiling

AutreEtudiant autreEtudiant = new AutreEtudiant("Geiser", "Arnaud", List.of(new Note(3.5), new Note(5), new Note(6)));
autreEtudiant.nom; // => Geiser
autreEtudiant.prenom; // => Arnaud
autreEtudiant.notes.get(0); // => 3.5
autreEtudiant.notes.get(1); // => 5