Java & netbeans & MySQL

Bonjour,
je développe une application d'authentification avec java. j'ai déja crée l 'interface graphique nécessaire. mais pour que ça soit fonctionnel, il faut faire des tests et des comparaison dans une base de données SQL.

voila le code. je sais pas ou réside l'erreur

package telecom;

import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;


public class authentification extends javax.swing.JFrame {
    /** Creates new form authentification */
    public authentification() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jButton2 = new javax.swing.JButton();
        jPasswordField1 = new javax.swing.JPasswordField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("Connexion");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel1.setFont(new java.awt.Font("Times New Roman", 1, 12)); // NOI18N
        jLabel1.setText("Nom d'utilisateur");

        jLabel2.setFont(new java.awt.Font("Times New Roman", 1, 12)); // NOI18N
        jLabel2.setText("Mot de passe");

        jButton2.setText("Annuler ");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(58, 58, 58)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 111, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 64, Short.MAX_VALUE)
                .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 111, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(56, 56, 56))
            .addGroup(layout.createSequentialGroup()
                .addGap(48, 48, 48)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1)
                    .addComponent(jLabel2))
                .addGap(60, 60, 60)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addComponent(jPasswordField1)
                    .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 107, Short.MAX_VALUE))
                .addContainerGap(92, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(76, 76, 76)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 47, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(jPasswordField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(50, 50, 50)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton2)
                    .addComponent(jButton1))
                .addGap(64, 64, 64))
        );

        pack();
    }// </editor-fold>                        

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         

        Session S=NewHibernateUtil.getSessionFactory().openSession();
        Criteria cr= S.createCriteria(Agence.class);
                  List <Agence> var= cr.list();

                  for(Agence e:var)
                  {
                   if((jTextField1.getText().equals(e.getLogin()))&&(jPasswordField1.getText().equals(e.getMotPasse())))

                       new gestiondeclient().setVisible(true);

                   else
                   {
                   javax.swing.JOptionPane.showMessageDialog(null,"Vérifier vos données SVP ");
                 }

              break;
                  }

    }                                        

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
jTextField1.setText(null);
jPasswordField1.setText(null);

    }                                        

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new authentification().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JPasswordField jPasswordField1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration                   

}

svp aidez moi c'est urgent!!!!