Exception with JTabbedPane

Question

In my project, I build a dialog box. I build a JTabbedPane within. Each tab is a panel with JChecxBox. When I add my first panel using the method addTab() no problem, with my second panel still no problem. When I try adding a third, an exception occurs: java.lang.ArrayIndexOutOfBoundsException: 2>1
I have also used the method printStackTrace to know what's going on:
java.lang.ArrayIndexOutOfBoundsException: 2 > 1
     at java.util.Vector.insertElementAt(Vector.java:551)
     at javax.swing.JTabbedPane.insertTab(JTabbedPane.java:441)
     at javax.swing.JTabbedPane.addTab(JTabbedPane.java:512)
     at myprojects.hopital.Cl�sComp.<init>(Cl�sComp.java:113)
     at myprojects.hopital.Hopital$1$MenuAction.actionPerformed(Hopital.java:72)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1450)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1504)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:378)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:250)
     at javax.swing.AbstractButton.doClick(AbstractButton.java:279)
     at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:886)
     at java.awt.Component.processMouseEvent(Component.java:3717)
     at java.awt.Component.processEvent(Component.java:3546)
     at java.awt.Container.processEvent(Container.java:1164)
     at java.awt.Component.dispatchEventImpl(Component.java:2595)
     at java.awt.Container.dispatchEventImpl(Container.java:1213)
     at java.awt.Component.dispatchEvent(Component.java:2499)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2216)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
     at java.awt.Container.dispatchEventImpl(Container.java:1200)
     at java.awt.Window.dispatchEventImpl(Window.java:912)
     at java.awt.Component.dispatchEvent(Component.java:2499)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:319)
     at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
It seems that addTab call insertTab calling himself insertElementAt which throw this exception? I don't understand what's going on. Here my code for my DialogBox:
package myprojects.hopital;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import java.util.*;
//import java.lang.*;
public class Cl�sComp extends JDialog {
     Comparateur[] cl�s;
     int nbCl�s;
     boolean ok;
     JCheckBox jcbAdd;
     JCheckBox jcbMoy;
     JCheckBox jcbM�d;
     JCheckBox jcbEct;
     JCheckBox jcbSamj;
     JCheckBox jcbAll;
     JCheckBox jcbProv;
     JCheckBox jcbTadm;
     JCheckBox jcbTpat;
     JCheckBox jcbAmoy;
     JCheckBox jcbAmed;
     JCheckBox jcbAect;
     JCheckBox jcbVobsinf;
     public Cl�sComp(){
          super((JFrame)null,"Choix des cl�s de comparaisons",true);
          Container contentPane=getContentPane();
          //setLayout(new GridBagLayout());
          nbCl�s=0;
          cl�s=new Comparateur[10];
          class ButtonAction implements ActionListener
               public void actionPerformed(ActionEvent e) {
                    String commande;
                    commande=e.getActionCommand();
                    if (commande.compareTo("Cancel")==0){
                         hide();
                    if (commande.compareTo("OK")==0){
                         if (jcbAdd.isSelected()) {
                              Comparateur c=new Comparateur(1);
                              addCl�(c);
                              ok=true;
                         if (jcbMoy.isSelected()) {
                              Comparateur c=new CompMoy(0);
                              addCl�(c);
                              ok=true;
                         if (jcbM�d.isSelected()) {
                              Comparateur c=new CompMed(0);
                              addCl�(c);
                              ok=true;
                         if (jcbEct.isSelected()) {
                              Comparateur c=new CompET(0);
                              addCl�(c);
                              ok=true;
                         if (jcbSamj.isSelected()) {
                              Comparateur c=new CompSAMJ(0);
                              addCl�(c);
                              ok=true;
                         hide();
          JTabbedPane jtpMisc=new JTabbedPane();
          JPanel jpCheckBox=new JPanel(new GridLayout(2,2));
          jcbAdd=new JCheckBox("Nombre");
          jcbMoy=new JCheckBox("Moyenne");
          jcbM�d=new JCheckBox("M�diane");
          jcbEct=new JCheckBox("Ecart-type");
          jcbSamj=new JCheckBox("Sapi activit� moyenne");
          jcbAll=new JCheckBox("Tout");
          jcbProv=new JCheckBox("Provenance");
          jcbTadm=new JCheckBox("Type d'admission");
          jcbTpat=new JCheckBox("Type de pathologie");
          jcbAmoy=new JCheckBox("Moyenne");
          jcbAmed=new JCheckBox("M�diane");
          jcbAect=new JCheckBox("Ecart-Type");
          jpCheckBox.add(jcbAdd);
          jpCheckBox.add(jcbMoy);
          jpCheckBox.add(jcbM�d);
          jpCheckBox.add(jcbEct);
          jpCheckBox.add(jcbSamj);
          jtpMisc.addTab("Divers",null,jpCheckBox,"C'est compl�tement foireux");
          jtpMisc.setSelectedIndex(0);
          JPanel jpParamPhys=new JPanel();
          jcbVobsinf=new JCheckBox("Valeur obs. inf.");
          jpParamPhys.add(jcbVobsinf);
          jtpMisc.addTab("Param�tres physiologiques",jpParamPhys);
          JPanel jpActivit�s=new JPanel();
          jpActivit�s.add(jcbProv);
          JPanel jpSapiSev=new JPanel();
          jpSapiSev.add(jcbTpat);
          JPanel jpSapiAct=new JPanel();
          jpSapiAct.add(jcbTadm);
try{     jtpMisc.addTab("Activit�s",jpParamPhys);
     //     jtpMisc.addTab("SAPI-SEVERITE",jpParamPhys);
     //     jtpMisc.addTab("SAPI-ACTIVITE",jpParamPhys);
     catch(Exception e){
          System.out.println(e.toString());
          System.out.println(e.getMessage());
          System.out.println(e.getLocalizedMessage());
          try{e.printStackTrace(new PrintStream(new FileOutputStream("c:\\Beno�t\\error.txt")));}
          catch(Exception exc){System.out.println("Encore une exception, putain");}
          ButtonAction bAction=new ButtonAction();
          JPanel jpButton=new JPanel(new GridLayout(1,2));
          JButton jbOk=new JButton("OK");
          JButton jbCancel=new JButton("Cancel");
          jpButton.add(jbOk);
          jpButton.add(jbCancel);
          jbCancel.addActionListener(bAction);
          jbOk.addActionListener(bAction);
          contentPane.add(jpButton,BorderLayout.SOUTH);
          contentPane.add(jtpMisc,BorderLayout.CENTER);
     //     contentPane.add(jpCheckBox,BorderLayout.CENTER);
          setSize(500,400);
          setLocation(200,150);
     public Comparateur getCl�(int index){
          return cl�s[index];
     public boolean ok(){
          return ok;
     public int getNbCl�s(){
          return nbCl�s;
     public void addCl�(Comparateur c){
          nbCl�s++;
          cl�s[nbCl�s-1]=c;
}

Answer 1

Conceptually wrong.
Hints: every tab in a JTabbedPane is a JPanel in fact.