Bonjour à tous!
J'ai deja recherché sur le forum sans succes, et modifié encore et encore mon code, je suis toujours face à un probleme dans mon JPanel qui ne veut pas prendre en compte ma JScrollPane.

Voila la class du Panel:

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

public class OuvPartPanel extends JPanel {

// Declaration d'objets graphique
JPanel mainPanel,temp;
JScrollPane scrollPane;

JPanel blPanel1, blPanel2,blPanel3,blPanel4,blPanel5,blPanel6,blPanel7,
blPanel8,blPanel9,blPanel10;
JPanel gridPanel1, gridPanel2, gridPanel3, gridPanel4, gridPanel5, gridPanel6,
gridPanel7, gridPanel8, gridPanel9, gridPanel10;
JLabel op1, op2, op3, op4, op5, op6, op7, op8, op9, op10;
JLabel opDate1, opDate2, opDate3, opDate4, opDate5, opDate6, opDate7, opDate8,
opDate9, opDate10;
JLabel opHo1, opHo2, opHo3, opHo4, opHo5, opHo6, opHo7, opHo8, opHo9, opHo10;
JLabel opHf1, opHf2, opHf3, opHf4, opHf5, opHf6, opHf7, opHf8, opHf9, opHf10;
JComboBox cbOpDJ1, cbOpDJ2, cbOpDJ3, cbOpDJ4, cbOpDJ5, cbOpDJ6, cbOpDJ7, cbOpDJ8,
cbOpDJ9, cbOpDJ10;
JComboBox cbOpDM1, cbOpDM2, cbOpDM3, cbOpDM4, cbOpDM5, cbOpDM6, cbOpDM7, cbOpDM8,
cbOpDM9, cbOpDM10;
JComboBox cbOpDA1, cbOpDA2, cbOpDA3, cbOpDA4, cbOpDA5, cbOpDA6, cbOpDA7, cbOpDA8,
cbOpDA9, cbOpDA10;
JComboBox cbOpHoH1, cbOpHoH2, cbOpHoH3, cbOpHoH4, cbOpHoH5, cbOpHoH6, cbOpHoH7,
cbOpHoH8, cbOpHoH9, cbOpHoH10;
JComboBox cbOpHoM1, cbOpHoM2, cbOpHoM3, cbOpHoM4, cbOpHoM5, cbOpHoM6, cbOpHoM7,
cbOpHoM8, cbOpHoM9, cbOpHoM10;
JComboBox cbOpHfH1, cbOpHfH2, cbOpHfH3, cbOpHfH4, cbOpHfH5, cbOpHfH6, cbOpHfH7,
cbOpHfH8, cbOpHfH9, cbOpHfH10;
JComboBox cbOpHfM1, cbOpHfM2, cbOpHfM3, cbOpHfM4, cbOpHfM5, cbOpHfM6, cbOpHfM7,
cbOpHfM8, cbOpHfM9, cbOpHfM10;

JPanel[] blPanel ={blPanel1, blPanel2,blPanel3,blPanel4,blPanel5,blPanel6,blPanel7, blPanel8,blPanel9,blPanel10};
JPanel[] gridPanel ={gridPanel1, gridPanel2, gridPanel3, gridPanel4, gridPanel5, gridPanel6, gridPanel7, gridPanel8, gridPanel9, gridPanel10};
JLabel[] op ={op1, op2, op3, op4, op5, op6, op7, op8, op9, op10};
JLabel[] opDate ={opDate1, opDate2, opDate3, opDate4, opDate5, opDate6, opDate7, opDate8,opDate9, opDate10};
JLabel[] opHo ={opHo1, opHo2, opHo3, opHo4, opHo5, opHo6, opHo7, opHo8, opHo9, opHo10};
JLabel[] opHf ={opHf1, opHf2, opHf3, opHf4, opHf5, opHf6, opHf7, opHf8, opHf9, opHf10};
JComboBox[] cbOpDJ ={cbOpDJ1, cbOpDJ2, cbOpDJ3, cbOpDJ4, cbOpDJ5, cbOpDJ6, cbOpDJ7, cbOpDJ8, cbOpDJ9, cbOpDJ10};
JComboBox[] cbOpDM ={cbOpDM1, cbOpDM2, cbOpDM3, cbOpDM4, cbOpDM5, cbOpDM6, cbOpDM7, cbOpDM8, cbOpDM9, cbOpDM10};
JComboBox[] cbOpDA ={cbOpDA1, cbOpDA2, cbOpDA3, cbOpDA4, cbOpDA5, cbOpDA6, cbOpDA7, cbOpDA8, cbOpDA9, cbOpDA10};
JComboBox[] cbOpHoH ={cbOpHoH1, cbOpHoH2, cbOpHoH3, cbOpHoH4, cbOpHoH5, cbOpHoH6, cbOpHoH7, cbOpHoH8, cbOpHoH9, cbOpHoH10};
JComboBox[] cbOpHoM ={cbOpHoM1, cbOpHoM2, cbOpHoM3, cbOpHoM4, cbOpHoM5, cbOpHoM6, cbOpHoM7, cbOpHoM8, cbOpHoM9, cbOpHoM10};
JComboBox[] cbOpHfH ={cbOpHfH1, cbOpHfH2, cbOpHfH3, cbOpHfH4, cbOpHfH5, cbOpHfH6, cbOpHfH7, cbOpHfH8, cbOpHfH9, cbOpHfH10};
JComboBox[] cbOpHfM ={cbOpHfM1, cbOpHfM2, cbOpHfM3, cbOpHfM4, cbOpHfM5, cbOpHfM6, cbOpHfM7, cbOpHfM8, cbOpHfM9, cbOpHfM10};

OuvPartPanel(){

mainPanel = new JPanel(new GridLayout(10,1));
temp = new JPanel(new BorderLayout());

for ( int i=0;i<10;i++ ){
blPanel[i] = new JPanel(new BorderLayout());
gridPanel[i] = new JPanel(new GridLayout(3,4));
op[i] = new JLabel("<html><B>Ouverture Particulière "+i+" : </html>");
opDate[i] = new JLabel(" Date : (jour, mois, année)");
opHo[i] = new JLabel(" Heure d'ouverture : (heure, minute)");
opHf[i] = new JLabel(" Heure de fermeture : (heure, minute)");
cbOpDJ[i] = new JComboBox();
cbOpDM[i] = new JComboBox();
cbOpDA[i] = new JComboBox();
cbOpHoH[i] = new JComboBox();
cbOpHoM[i] = new JComboBox();
cbOpHfH[i] = new JComboBox();
cbOpHfM[i] = new JComboBox();

blPanel[i].add(op[i], BorderLayout.NORTH);
gridPanel[i].add(opDate[i]);
gridPanel[i].add(cbOpDJ[i]);
gridPanel[i].add(cbOpDM[i]);
gridPanel[i].add(cbOpDA[i]);
gridPanel[i].add(opHo[i]);
gridPanel[i].add(cbOpHoH[i]);
gridPanel[i].add(cbOpHoM[i]);
gridPanel[i].add(new JLabel(" "));
gridPanel[i].add(opHf[i]);
gridPanel[i].add(cbOpHfH[i]);
gridPanel[i].add(cbOpHfM[i]);
blPanel[i].add( gridPanel[i] );

mainPanel.add(blPanel[i], BorderLayout.CENTER);

}
this.setPreferredSize(new Dimension(800,300));
scrollPane = new JScrollPane();
scrollPane.setViewportView(mainPanel);
//this.setPreferredSize(new Dimension(800,800));
//scrollPane = new JScrollPane(mainPanel);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(20, 100));

temp.add(mainPanel);
temp.add(scrollPane, BorderLayout.EAST);

this.add(temp);
}
}



Et Voici la class de Test

import javax.swing.JFrame;

public class TestOuvPartPanel extends JFrame {
public TestOuvPartPanel(){
setTitle("Test Ouverture particuliere");
setSize(850,440);
setResizable(true);
OuvPartPanel panel = new OuvPartPanel();
getContentPane().add(panel);
setVisible(true);
}

public static void main(String[] args){
new TestOuvPartPanel();
}
}