[AWT/ Swing] Erreur "java.lang.NullPointerException"
Bonjour et merci d'avance pour votre aide.
je tiens à rappeller que je suis un novice en JAVA donc soyer indulgent.
Je travaille sur un projet actullement et je ne parviens pas à passer acceder à une de mes interfaces. en effet en cliquant sur un bouton dont voici le contenu
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private void jBtn_ContinuerCreationCircuitActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
int nbLigne=20;
int nbColone=20;
JButton [] tab_bouton = new JButton[100];
Conteneur[][] data = new Conteneur[nbLigne][nbColone];
TronçonRoute[] tronconTab = new TronçonRoute [nbLigne*nbColone];
FenetreObjet fenetreDeSelectionObjets = new FenetreObjet(data,tab_bouton);
fenetreDeSelectionObjets.setVisible(true);//On la rend visible
FenetreDeSelection fenetre = new FenetreDeSelection(fenetreDeSelectionObjets,tronconTab,tab_bouton);
fenetre.setVisible(true);//On la rend visible
fenetre.setSize(800, 800);
} |
je dois acceder à la fenetre dont le code est affiché ci dessous
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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package course;
import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import course.FenetreObjet;
/**
*
* @author pisix
*/
public class FenetreDeSelection extends JFrame {
private int nbreTroncon=0;
private FenetreObjet fenetreAttache;
private Conteneur[][] conteneur;
private JPanel pan = new JPanel();
private JButton [] tabButton = new JButton[100];
private TronçonRoute [] tronconTab = new TronçonRoute[100];
public FenetreDeSelection(FenetreObjet fen, TronçonRoute[] Tronçon,JButton [] bouton){
super();
fenetreAttache = fen;
tronconTab=Tronçon;
tabButton = bouton;
setLocation(0,0); //fixe la fenetre en haut a gauche
setResizable(false); //interdit redimensionnement de la fenetre
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //se ferme lors du clic sur la croix
GridLayout gridLayout = new GridLayout(20,20);
pan.setLayout(gridLayout);
for(int j=0;j<100;j++) {
int ligne=j/20;
int colonne=j%20;
tronconTab[j]=new TronçonRoute();
tabButton[j]=new JButton();
this.conteneur[ligne][colonne]=new Conteneur();
tabButton[j].setIcon(new ImageIcon("/home/pisix/NetBeansProjects/course/images/vert.png"));
tabButton[j].setBorder(null);
tabButton[j].addMouseListener( new MouseListenerH(tabButton[j]));
pan.add(tabButton[j]);
tabButton[j].addActionListener(new ActionListenerH(j,tabButton[j], fenetreAttache, conteneur,tronconTab[nbreTroncon],tabButton));
nbreTroncon++;
}
this.setContentPane(pan);
this.setVisible(true);
}
} |
cependant j'ai l'erreur
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on in thread "AWT-EventQueue-0" java.lang.NullPointerException
at course.FenetreDeSelection.<init>(FenetreDeSelection.java:50)
at views.PanAjouterCircuit.jBtn_ContinuerCreationCircuitActionPerformed(PanAjouterCircuit.java:202)
at views.PanAjouterCircuit.access$200(PanAjouterCircuit.java:19)
at views.PanAjouterCircuit$3.actionPerformed(PanAjouterCircuit.java:119)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3312)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97) |
Et je ne vois pas quelle valeur est à nulle dans le code presenté plus haut. :cry:
Merci d'avance
