Code :

package java_projet;
 
 
public class GPAO_database {
    static{
        try{
            java.sql.DriverManager.registerDriver(new org.apache.derby.jdbc.EmbeddedDriver());
            java.sql.Statement statement = java.sql.DriverManager.getConnection("jdbc:derby:GPAO_database;create=true").createStatement();
            statement.execute("create table Article(\n"
                    + "reference varchar(30),\n"
                    + "designation varchar(30) not null,\n"
                    + "type_fabrication_achat varchar(30) not null,\n"
                    + "unite_achat_stock varchar(30) not null,\n"
                    + "delai_en_semaine integer not null,\n"
                    + "prix_standard float,\n"
                    + "lot_de_reapprovisionnement integer,\n"
                    + "stock_mini integer,\n"
                    + "stock_maxi integer,\n"
                    + "pourcentage_de_perte float,\n"
                    + "inventaire integer,\n"
                    + "PF_ou_MP_ou_Piece_ou_SE char(2),\n"
                    + "constraint Article_pk primary key(reference),\n"
                    + "constraint Article_unique unique(designation),\n"
                    + "constraint Article_check check(PF_ou_MP_ou_Piece_ou_SE = 'PF' or PF_ou_MP_ou_Piece_ou_SE = 'MP' or PF_ou_MP_ou_Piece_ou_SE = 'Pi' or PF_ou_MP_ou_Piece_ou_SE = 'SE'))");
            statement.execute("create table Lien_de_nomenclature(\n"
                    //-- lien_de_nomenclature_id long,
                    + "compose varchar(30),\n"
                    + "composant varchar(30),\n"
                    + "quantite_de_composition float not null,\n"
                    + "constraint Lien_de_nomenclature_pk primary key(compose,composant),\n"
                    + "constraint Lien_de_nomenclature_fk_1 foreign key(compose) references Article(reference) on delete cascade,\n"
                    + "constraint Lien_de_nomenclature_fk_2 foreign key(composant) references Article(reference) on delete cascade)");
                    //-- constraint Lien_de_nomenclature_check check(compose <> composant)
            statement.execute("create table Remplacement(\n"
                    + "remplace_compose varchar(30),\n"
                    + "remplace_composant varchar(30),\n"
                    + "remplacant_compose varchar(30),\n"
                    + "remplacant_composant varchar(30),\n"
                    + "date_de_remplacement date not null,\n"
                    //-- constraint Remplacement_pk primary key(remplace_compose,remplace_composant,remplacant_compose,remplacant_composant),
                    + "constraint Remplacement_fk_1 foreign key(remplace_compose,remplace_composant) references Lien_de_nomenclature(compose,composant) on delete cascade,\n"
                    + "constraint Remplacement_fk_2 foreign key(remplacant_compose,remplacant_composant) references Lien_de_nomenclature(compose,composant) on delete cascade)");
                    //-- constraint Remplacement_check check(remplace <> remplacant)
            statement.execute("create table Poste_de_charge(\n"
                    + "numero_section integer,\n"
                    + "numero_sous_section integer,\n"
                    + "est_machine smallint,\n"
                    + "designation varchar(30) not null,\n"
                    + "taux_horaire_ou_forfait integer not null,\n"
                    + "nombre_de_postes integer not null,\n"
                    + "capacite_nominale integer not null,\n"
                    + "type_taux_horaire_ou_forfait char(2) not null,\n"
                    + "constraint Poste_de_charge_pk primary key(numero_section,numero_sous_section,est_machine),\n"
                    + "constraint Poste_de_charge_check_1 check(est_machine = 0 or est_machine = 1),\n"
                    + "constraint Poste_de_charge_check_2 check(type_taux_horaire_ou_forfait = 'TH' or type_taux_horaire_ou_forfait = 'F'))"); 
            statement.execute("create table Operation(\n"
                    + "gamme_de_fabrication varchar(30),\n"
                    + "numero_operation integer,\n"
                    + "machine_numero_section integer,\n"
                    + "machine_numero_sous_section integer,\n"
                    + "machine_est_machine smallint,\n"
                    + "main_d_oeuvre_numero_section integer,\n"
                    + "main_d_oeuvre_numero_sous_section integer,\n"
                    + "main_d_oeuvre_est_machine smallint,\n"
                    + "temps_preparation integer,\n"
                    + "temps_execution integer,\n"
                    + "temps_transfert integer not null,\n"
                    + "libelle_operation varchar(30) not null,\n"
                    + "constraint Operation_pk primary key(gamme_de_fabrication,numero_operation),\n"
                    + "constraint Operation_fk1 foreign key(gamme_de_fabrication) references Article(reference) on delete cascade,\n"
                    + "constraint Operation_fk2 foreign key(machine_numero_section,machine_numero_sous_section,machine_est_machine) references Poste_de_charge(numero_section,numero_sous_section,est_machine),\n"
                    + "constraint Operation_fk3 foreign key(main_d_oeuvre_numero_section,main_d_oeuvre_numero_sous_section,main_d_oeuvre_est_machine) references Poste_de_charge(numero_section,numero_sous_section,est_machine),\n"
                    + "constraint Operation_check_1 check(machine_est_machine = 1),\n"
                    + "constraint Operation_check_2 check(main_d_oeuvre_est_machine = 0))");
            statement.execute("create table Mouvement_de_stock(\n"
                    + "reference varchar(30),\n"
                    + "numero_magasin integer,\n"
                    + "quantite integer,\n"
                    + "periode date,\n"
                    + "type char(6) not null,\n"
                    //-- constraint Mouvement_de_stock_pk primary key(reference,periode,type),
                    + "constraint Mouvement_de_stock_fk foreign key(reference) references Article(reference),\n"
                    + "constraint Mouvement_de_stock_check check(type = 'Entree' or type = 'Sortie'))");
            statement.execute("insert into Article values('ROUE50','roue de camion','achat par lot','unite',6,1.5,500,500,2000,null,1850,'Pi')");
            statement.execute("insert into Article values('ES000','essieu monte','fabr. par lot','unite',2,null,500,750,1500,null,null,'SE')");
            statement.execute("insert into Article values('CH005','chassis monte','fabr. par lot','unite',1,null,300,null,900,null,null,'SE')");
            statement.execute("insert into Article values('H000','conteneur bleu','fabr. par lot','unite',1,null,150,350,800,null,null,'SE')");
            statement.execute("insert into Article values('H001','conteneur bleu special','fabr. a la commande','unite',1,null,150,350,null,null,null,'SE')");
            statement.execute("insert into Article values('CD100','camion demenagement bleu','pf fabr. par lot','unite',2,null,200,null,600,null,null,'PF')");
            statement.execute("insert into Lien_de_nomenclature values('ES000','ROUE50',2)");
            statement.execute("insert into Lien_de_nomenclature values('CH005','ES000',2)");
            statement.execute("insert into Lien_de_nomenclature values('CD100','CH005',1)");
            statement.execute("insert into Lien_de_nomenclature values('CD100','H000',1)");
            statement.execute("insert into Lien_de_nomenclature values('CD100','H001',1)");
            statement.execute("insert into Remplacement values('CD100','H000','CD100','H001',DATE('2007-09-13'))");
            statement.execute("insert into Poste_de_charge values(500,450,1,'Rectifieuse',80,1,39,'TH')");
            statement.execute("insert into Poste_de_charge values(500,450,0,'Rectifieur',80,1,39,'TH')");
            statement.execute("insert into Operation values('ES000',020,500,450,1,500,450,0,0.5,0.05,0.2,'Rectification')");            
        }catch (java.sql.SQLException sqle1){
            System.err.println("'GPAO_database' probably already exists? " + sqle1.getMessage());
            java.sql.Connection connection;
            java.sql.Statement clean_up;
            try {
                connection = java.sql.DriverManager.getConnection("jdbc:derby:GPAO_database");
                clean_up = connection.createStatement();
                clean_up.execute("delete from GoCO");
                clean_up.execute("delete from GonyPO");
                clean_up.execute("delete from GoaVA");
                clean_up.execute("delete from GonyVA");
                connection.commit();
            } catch (java.sql.SQLException sqle2) {
                System.err.println("'GPAO_database' persistent error: " + sqle2.getMessage());
                System.exit(-1);
 
            }
        }
    }
 
    private java.sql.Connection _connection;
    //private java.sql.ResultSet _available_cards;
 
    public GPAO_database() throws java.sql.SQLException {
        _connection = java.sql.DriverManager.getConnection("jdbc:derby:GPAO_database");
        _connection.setAutoCommit(false);
        /*_available_cards = _connection.createStatement(java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE, java.sql.ResultSet.CONCUR_READ_ONLY).executeQuery("SELECT DISTINCT PLASTIC_CARD.SERIAL_NUMBER, LOGICAL_CARD.CARD_NUMBER, CLIENT.BANK_CODE, CLIENT.NAME, CLIENT.CLIENT_PIN, LOGICAL_CARD.PASSWORD, LOGICAL_CARD.WITHDRAWAL_WEEKLY_LIMIT\n"
                + "FROM PLASTIC_CARD, CLIENT, LOGICAL_CARD\n"
                + "WHERE PLASTIC_CARD.CARD_NUMBER = LOGICAL_CARD.CARD_NUMBER\n"
                + "AND LOGICAL_CARD.CLIENT_PIN = CLIENT.CLIENT_PIN");
        */
    }
 
    public java.sql.Connection activate_connection() throws Exception {
        if (_connection == null) {
            throw new Exception("Fatal error: JDBC not initialized");
        }
        return _connection;
    }
 
    public void disactivate_connection() throws Exception {
        if (_connection == null) {
            throw new Exception("Fatal error: JDBC not initialized");
        }
        _connection.commit();
        _connection.close();
    }

Au niveau de la ligne "java.sql.DriverManager.registerDriver(new org.apache.derby.jdbc.EmbeddedDriver());" l'IDE (NetBeans 8.2 avec JDK 1.8) m'affiche une erreur "package org.apache.derby.jdbc does not exist"
J'aimerais savoir comment résoudre le probleme, sachant que j'ai déjà tenté plusieur chose, comme telecharger "db-derby-10.13.1.1-bin" (là ou se trouve "org.apache.derby.jdbc") et je l'ai intégré au projet en tant que librairie, celat ne change absolument rien .
Merci de votre lecture.