Base de la Conception Orientée Objet

package Catalogue;
import java.util.Date;

public class Catalogue {
	private String nom;
	private Date dateCreation;

	public Catalogue() {
		...
	}

	public Livre chercherLivre(String isbn) {
		...
	}
}

public abstract class Personne {
	private String nom;
	private String prenom;
	protected Date dateNaissance;
	private static int ageMajorite = 18;
	public abstract int calculerDureePret() {... }
	public static void setAgeMajorite (int aMaj) {... }
}

public class Adherent extends Personne {
	private int iD;

	public Adherent() { ... }
	public int getAge() { ... }
	public int calculerDureePret() { ... }
}

public class A1 {
	private B1 leB1;
}
public class A2 {
	private B2 lesB2[ ];
}
public class A3 {
	private List lesB3 = new ArrayList();
}

package Bibliotheque;
import Catalogue;

public class Bibliotheque {
	private Catalogue leCatalogue;
	...
}

public class Emploi {
	private String titre
	private Double salaire;
	private Employe salarie;
	private Societe employeur;
	...
}