bonjour a tous
voilà , j'ai un petit probleme qui demande votre experience du java.
je fais un projet a rendre pour le 19 decembre et j'ai une exception in thread comme ceci :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at Listener.actionPerformed(Listener.java:38)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)On crée l'adherent : 0

at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)


ca fait un bout de temps que je cherche , mais je ne trouve pas d'ou ca vient..... j'ai un peu honte.

je vous montre un peu le code :



Code : Sélectionner tout - Visualiser dans une fenêtre à part
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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JComboBox;
import javax.swing.JTextField;
 
 
public class Listener implements ActionListener{
	Client [] monClient;
 
	JTextField field2;	JTextField field3;
	JTextField field4;	JTextField field5;	JTextField field6;
	JTextField field7;	JTextField field8;JTextField field9;	JTextField field10;
 
	JComboBox b;
 
	public Listener (Client [] _c,JTextField _2,JTextField _3,
	JTextField _4,JTextField _5,JTextField _6,JTextField _7,JTextField _8 ,JComboBox _b,JTextField _9){
 
		this.field2 = _2;
		this.field3 = _3;
		this.field4 = _4;
		this.field5 = _5;
		this.field6 = _6;
		this.field7 = _7;
		this.field8 = _8;
		this.field9 = _9;
 
		this.monClient = _c;
		this.b = _b;
 
	}
 
	public void actionPerformed(ActionEvent arg0) {
		System.out.println ("Creation");
		int i = Client.nombreTotal;
		System.out.println ("On crée l'adherent : "+i);
		this.monClient[i] = new Client(i,field2.getText() , field3.getText(), field4.getText(),field5.getText(),field6.getText(),field7.getText(),field8.getText(),b.getSelectedItem(),field9.getText());
	}
}

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import javax.swing.*;          
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.text.*;
 
public class maJFrame implements ActionListener {
//JLabels et JButton pour la modification/creation du client--------------------------------------------------------------------
	JLabel label1;		
	JLabel label2;		
	JLabel label3;
	JLabel label4;		
	JLabel label5;		
	JLabel label6;
	JLabel label7;		
	JLabel label8;		
	JLabel label9;
	JLabel label10;	    
	JLabel label11;
 
	JLabel text1;		
	JLabel text2;		
	JLabel text3;
 
	JTextField field1;	JTextField field2;	JTextField field3;
	JTextField field4;	JTextField field5;	JTextField field6;
	JTextField field7;	JTextField field8;	JTextField field9;
	JTextField field10;	JTextField field11;
 
	JButton button1;		
	JButton button2;
	JComboBox box;
//FIN--------------------------------------------------------------------------------------------------------------------------
//JLabels et JButton pour la creation d'une commande---------------------------------------------------------------------------
 
	JLabel label12;
 
	JLabel text4;	JLabel text5;	JLabel text6;
	JLabel text7;	JLabel text8;	JLabel text9;
	JLabel text10;	JLabel text11;	JLabel text12;
	JLabel text13;
 
	JTextField field12;	JTextField field13;	JTextField field14;
	JTextField field15;	JTextField field16;	JTextField field17;
	JTextField field18;	JTextField field19;
 
	 JButton button3;		JButton button4;
//FIN--------------------------------------------------------------------------------------------------------------------------
	public Component createComponents() {
		Client [] c = new Client[50];
		JPanel pane = new JPanel(new GridLayout(19, 2));
		JPanel pane2 = new JPanel (new GridLayout(11,2));
		JTabbedPane tabpane = new JTabbedPane();
		pane.setBorder(BorderFactory.createEmptyBorder(
                10, //top
                10, //left
                10, //bottom
                10) //right
                );
		pane2.setBorder(BorderFactory.createEmptyBorder(
				10, //top
				10, //left
				10, //bottom
				10) //right
				);
 
/******************************************************************************************************************************
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////PANE//////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
******************************************************************************************************************************/
		 text1   = new JLabel ("Créer/Modifier un client");
 
		 button1 = new JButton ("Valider");
		 button2 = new JButton ("Retour");
 
		 label1  = new JLabel ("N° client");		
		 label2  = new JLabel ("Nom");			field2  = new JTextField ();
	   	 label3  = new JLabel ("Prénom");		field3  = new JTextField ();
	     label4  = new JLabel ("Nom Société");	field4  = new JTextField ();
		 label5  = new JLabel ("N° CNE");		field5  = new JTextField ();
	     label6  = new JLabel ("Téléphone");	field6  = new JTextField ();
		 label7  = new JLabel ("Adresse");		field7  = new JTextField ();
	   	 label8  = new JLabel ("Précision");	field8  = new JTextField ();
	     //label9  = new JLabel ("Code Postal");	field9  = new JTextField ();
		 label10 = new JLabel ("Ville");		//field10 = new JTextField ();
		 label11 = new JLabel ("Observation");	field11 = new JTextField ();
		 box = new JComboBox();
		 box.addItem("Versailles");
		 box.addItem("Le Chesnay");
		 box.addItem("Rocquencourt");
		 box.addItem("La Celle St Cloud");
 
	        //On l'ajoute au container
			pane.add(new JLabel(""));
			pane.add(text1);
			pane.add(new JLabel(""));
 
			pane.add(new JLabel(""));
			pane.add(new JLabel(""));
			pane.add(new JLabel(""));
 
			pane.add(label1);
			pane.add(new JLabel("auto")); // récuperer code client dans Commande.java ou generer 
			pane.add(new JLabel(""));
 
			pane.add(label2);
			pane.add(field2);
			pane.add(new JLabel(""));
 
			pane.add(label3);
			pane.add(field3);
			pane.add(new JLabel(""));
 
			pane.add(label4);
			pane.add(field4);
			pane.add(new JLabel(""));
 
			pane.add(label5);
			pane.add(field5);
			pane.add(new JLabel(""));
 
			pane.add(label6);
			pane.add(field6);
			pane.add(new JLabel(""));
 
			pane.add(label7);
			pane.add(field7);
			pane.add(new JLabel(""));
 
			pane.add(label8);
			pane.add(field8);
			pane.add(new JLabel(""));
 
			//pane.add(label9);
			//pane.add(field9);
			//pane.add(new JLabel(""));
 
			pane.add(label10);
			//pane.add(field10);
			pane.add(box);
			pane.add(new JLabel(""));
 
			pane.add(label11);
			pane.add(field11);
			pane.add(new JLabel(""));
 
			pane.add(new JLabel(""));
			pane.add(button1);
			pane.add(new JLabel(""));
/******************************************************************************************************************************
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////PANE2/////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
******************************************************************************************************************************/
			 //text4   = new JLabel ("date");
			 //text5   = new JLabel ("heure");
			 text6   = new JLabel ("N° Commande");
			 text7   = new JLabel ("Standardiste");
			 text9   = new JLabel ("Téléphone");
			 text8   = new JLabel ("Nom");
			 text10   = new JLabel ("Code produit");
			 text11   = new JLabel ("Ingrédient(s)");
			 text12   = new JLabel ("Quantité");
			 text13  = new JLabel ("Prix");
 
			 label12  = new JLabel ("service");			 
 
			 field12  = new JTextField ();
			 field13  = new JTextField ();
			 field14  = new JTextField ();
			 field15  = new JTextField ();
			 field16  = new JTextField ();
			 field17  = new JTextField ();
			 field18  = new JTextField ();
			 field19  = new JTextField ();
 
		     button3 = new JButton ("Créer/Modifier");
		     button4 = new JButton ("Ajouter");
 
		     Date rightNow = new Date();
		     // Premier format de la date
		     SimpleDateFormat myFormat = new SimpleDateFormat("dd MMM yyyy");
		     // Second format de l'heure
		     SimpleDateFormat myFormat2 = new SimpleDateFormat("HH:mm:ss");
 
		     text4 = new JLabel (""+
		    		 // Applique le format myFormat sur l'objet rightNow passé en argument de la methode format()
		    		 myFormat.format(rightNow)
		    		 );
 
		     text5 = new JLabel (""+
		    		 myFormat2.format(rightNow)
		    		 );
		        //On l'ajoute au container
				pane2.add(text4);
				pane2.add(text5);
				pane2.add(label12);
 
				pane2.add(text6);
				pane2.add(new JLabel ("auto"));
				pane2.add(new JLabel(""));
 
				pane2.add(text7);
				pane2.add(field13);
				pane2.add(new JLabel(""));
 
				pane2.add(new JLabel(""));
				pane2.add(new JLabel(""));
				pane2.add(new JLabel(""));
 
				pane2.add(text8);
				pane2.add(field14);
				pane2.add(new JLabel(""));
 
				pane2.add(text9);
				pane2.add(field15);
				pane2.add(button3);
 
				pane2.add(new JLabel(""));
				pane2.add(new JLabel(""));
				pane2.add(new JLabel(""));
 
				pane2.add(text10);
				pane2.add(field16);
				pane2.add(new JLabel(""));
 
				pane2.add(text11);
				pane2.add(field17);
				pane2.add(new JLabel(""));
 
				pane2.add(text12);
				pane2.add(field18);
				pane2.add(new JLabel(""));
 
				pane2.add(text13);
				pane2.add(field19);
				pane2.add(button4);
 
				Listener t = new Listener (c, field2, field3, field4,field5,field6,field7,field8,box,field9 );
				button1.addActionListener (t);
 
				//on les rajoutes aux tabpane
				tabpane.addTab("creer/modifier client", null, pane, "pour creer ou modifier un client");
		        tabpane.addTab("Creer Commande", null, pane2, "pour ajouter une commande");
		        return tabpane;
	}
 
 
	public void actionPerformed(ActionEvent e) {
    }
	private static void createAndShowGUI() {
        JFrame frame = new JFrame("Standartiste , à vous !");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        maJFrame app = new maJFrame();
        Component contents = app.createComponents();
        frame.getContentPane().add(contents, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }
 
    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
 
}


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public class Client {
 
int Num_client;	
String Nom;	
String Prénom;
String Société;
String CNE;		
String Téléphone;	
String Adresse;		
String Précision;	
int Code_postal;	
Object Ville;		
String Observation;
public static int nombreTotal=0;
 
 
public Client (int _nc,String _nom,String _prenom,String _soc,String _cne,String _tel,String _adr,String _pre,
Object _vil,String _obs){
	this.Num_client = _nc;
	this.Nom = _nom;
	this.Prénom = _prenom;
	this.Société = _soc;
	this.CNE = _cne;
	this.Téléphone = _tel;
	this.Adresse = _adr;
	this.Précision = _pre;
	this.Ville = _vil;
	this.Observation = _obs;
 
	if (this.Ville == "Versailles"){
		this.Code_postal = 78000;
	}else if (this.Ville == "Le Chesnay" || this.Ville == "Rocquencourt"){
		this.Code_postal = 78150;
	}else if(this.Ville == "La Celle St Cloud"){
		this.Code_postal = 78170;
	}
 
	Client.nombreTotal++;
}
 
public Client (String _nom,String _prenom,String _soc,String _cne,String _tel,String _adr,String _pre,Object _vil,
		String _obs , int _nu){
			this.Nom = _nom;
			this.Prénom = _prenom;
			this.Société = _soc;
			this.CNE = _cne;
			this.Téléphone = _tel;
			this.Adresse = _adr;
			this.Précision = _pre;
			this.Ville = _vil;
			this.Observation = _obs;
			this.Num_client = Client.nombreTotal;
 
			if (this.Ville == "Versailles"){
				this.Code_postal = 78000;
			}else if (this.Ville == "Le Chesnay" || this.Ville == "Rocquencourt"){
				this.Code_postal = 78150;
			}else if(this.Ville == "La Celle St Cloud"){
				this.Code_postal = 78170;
			}
 
			Client.nombreTotal++;
}
}


Je vous remercie d'avance si vous reussissez a trouver l'erreur et même si vous la trouvez pas .
moi je vois vraiment pas là !