NullPointerException, mais pas toujours :)
Alors voici, j'ai une erreur de type NullPointerException, lorsque j'ajoute un nouveau nœud à mon JTree. Cela arrive environ une fois sur 4.
Ce JTree est destiné à filtrer les courbes représentés sur un graphique du type JFreeChart. Hélas, je ne comprends pas du tout d'où cela peut-il venir.
L'Erreur :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
----
at javax.swing.plaf.basic.BasicTreeUI.completeEditing(BasicTreeUI.java:2009)
at javax.swing.plaf.basic.BasicTreeUI.completeEditing(BasicTreeUI.java:1974)
at javax.swing.plaf.basic.BasicTreeUI$Handler.valueChanged(BasicTreeUI.java:3637)
at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:629)
at javax.swing.tree.DefaultTreeSelectionModel.clearSelection(DefaultTreeSelectionModel.java:570)
at javax.swing.tree.VariableHeightLayoutCache.rebuild(VariableHeightLayoutCache.java:740)
at javax.swing.tree.VariableHeightLayoutCache.treeStructureChanged(VariableHeightLayoutCache.java:626)
at javax.swing.plaf.basic.BasicTreeUI$Handler.treeStructureChanged(BasicTreeUI.java:3824)
at javax.swing.tree.DefaultTreeModel.fireTreeStructureChanged(DefaultTreeModel.java:561)
at javax.swing.tree.DefaultTreeModel.nodeStructureChanged(DefaultTreeModel.java:347)
at javax.swing.tree.DefaultTreeModel.setRoot(DefaultTreeModel.java:117)
at InterfaceGraphique.Tree.updateTree(Tree.java:102)
at InterfaceGraphique.View.constructFile(View.java:515)
at InterfaceGraphique.View.jMenuItem1ActionPerformed(View.java:375)
at InterfaceGraphique.View.access$000(View.java:51)
at InterfaceGraphique.View$4.actionPerformed(View.java:174)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
View :
Code:
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|
public class View extends javax.swing.JFrame{ --> L51
private void initComponents() {
....
JButton addFile = new JButton();
addFile.setMaximumSize(new Dimension(20, 20));
addFile.setText("+");
addFile.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) { L174
jMenuItem1ActionPerformed(evt);
}
});
....
JScrollPane treeview = tree.createTree();
treeview.setMinimumSize(new Dimension(0, 600));
treeview.setPreferredSize(new Dimension(200, 600));
splitPane.setLeftComponent(treeview);
....
}
private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {
JFileChooser chooser = new JFileChooser();
FileFilter filter = new FileFilter() {
public boolean accept(File pathname) {
if (pathname.isDirectory()) {
return true;
}
String extension = getExtension(pathname);
if (extension != null) {
return true;
}
return false;
}
public String getExtension(File f) {
String ext = null;
String s = f.getName();
int i = s.lastIndexOf('.');
if (i > 0 && i < s.length() - 1) {
ext = s.substring(i+1).toLowerCase();
}
return ext;
}
@Override
public String getDescription() {
return "Tout type de fichier";
}
};
chooser.setFileFilter(filter);
int returnVal = chooser.showOpenDialog(this);
if(returnVal == JFileChooser.APPROVE_OPTION) {
this.parseur = new Parseur(chooser.getSelectedFile().getPath());
constructFile(this.parseur.parseFile()); -->375
}
}
....
public void constructFile(Vector<Fnct> fnct){
Fichier file = new Fichier(fnct);
Position(file);
this.Fichiers.add(file);
int variable = this.Fichiers.size()-1;
file.setCouleur(new Color((100*variable)%255, (150*variable)%255, (200*variable)%255));
String pathfile = this.parseur.getpathfile();
if(this.comboisInit == false){
comboInit();
}
this.tree.updateTree(fnct.size(), pathfile, file); --> 515
AffData();
}
} //end of class view
public class Tree {
private JTree tree;
private DefaultMutableTreeNode root;
DefaultMutableTreeNode files;
int nbFnct;
private View parent;
public Tree(View parent){
this.parent = parent;
}
public JScrollPane createTree(){
tree = new JTree();
root = new DefaultMutableTreeNode(new String("Fichiers"));
tree = new JTree(root);
Tree_rendu tr = new Tree_rendu();
//DefaultTreeCellRenderer Tree_rendu;
Tree_edit te = new Tree_edit();
tree.setCellRenderer(tr);
//Tree_rendu = (DefaultTreeCellRenderer) tree.getCellRenderer();
tree.setCellEditor(te);
tree.setEditable(true);
JScrollPane jsp = new JScrollPane(tree);
//this.add(jsp);
return jsp;
}
public void updateTree(int nbFnct, String pathfile, Fichier fichier){
this.nbFnct = nbFnct;
Vector<DefaultMutableTreeNode> temp = new Vector();
for (int row = 0; row < this.root.getChildCount() ; row++) {
temp.add((DefaultMutableTreeNode)this.root.getChildAt(row));
}
String[] tempFile = pathfile.split("/");
chkbox jcb_files = new chkbox(fichier.getDisplayFile(), fichier, -1, new File(pathfile).getName());
files = new DefaultMutableTreeNode(jcb_files, true);
jcb_files.setSelected(true);
Vector<chkbox> chkboxes = new Vector();
for(int compteur=0; compteur < nbFnct; compteur++){
int num = compteur + 1;
chkbox jcb_fnct = new chkbox(fichier.getDisplayFnct().get(compteur), fichier, compteur, new String("Fonction " + num));
jcb_fnct.setSelected(true);
jcb_fnct.addActionListener(new java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent e){
filtre((chkbox)e.getSource());
}
});
chkboxes.add(jcb_fnct);
DefaultMutableTreeNode fnct = new DefaultMutableTreeNode(jcb_fnct, true);
files.add(fnct);
}
fichier.setCheckBox(chkboxes);
this.root.add(files);
((DefaultTreeModel) this.tree.getModel()).setRoot(this.root); -->L102
((DefaultTreeModel) this.tree.getModel()).reload();
jcb_files.addActionListener(new java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent e){
filtre((chkbox)e.getSource());
}
});
tree.repaint();
//this.tree.validate();
}
public void filtre(chkbox chkbox){
if(chkbox.isSelected() == true){
chkbox.setEnable();
}
else{
chkbox.setDisable();
}
this.parent.AffData();
this.tree.repaint();
}
} // end of class Tree |
Si quelqu'un pouvait m'aider à débusquer mon problème ce serait sympa.
