[JFileChooser] erreur lors du lancement ....
Bonjour a tous !
Je suis débutant en Java , et j'ai du m'y mettre pour le boulot. Je dois faire un Jfilechooser avec un filtre XML , j'ai donc repris un tuto de Developpez.com sur le sujet mais .... ca plante et je ne sais pas pourquoi.
Voici la classe de Filtre :
Code:
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public class FileFilterExtend extends FileFilter{
/*
* Description of files accepted by the filter
*/
private String description;
/*
* Extensions of files accepted by the filter
*/
private List<String> extensions;
/** Creates a new instance of FileFilterExtend
* from description
*
* @param description Description of files accepted by the filter
* @throws NullPointerException
*/
public FileFilterExtend(String description) {
if (description == null){
throw new NullPointerException("The description can't be null.");
}
this.description = description;
this.extensions = new ArrayList<String>();
}
/**
* Implementation of Filefilter
*/
public boolean accept(File f) {
if(f.isDirectory() || extensions.size()==0) {
return true;
}
String nomFichier = f.getName().toLowerCase();
for(String extension : extensions){
if(nomFichier.endsWith(extension)){
return true;
}
}
return false;
}
/**
* Implementation of Filefilter
*/
public String getDescription() {
StringBuffer buffer = new StringBuffer(description);
buffer.append(" (");
for(String extension : extensions){
buffer.append(extension).append(" ");
}
return buffer.append(")").toString();
}
/**
* Set the Description
*
* @param description Description of files accepted by the filter
* @throws NullPointerException If the description is null
*/
public void setDescription(String description){
if(description == null){
throw new NullPointerException("The description can't be null.");
}
this.description = description;
}
/**
* Add Extension to the fileChooser
*
* @param extension Extensions of files accepted by the filter
* @throws NullPointerException If the extension is null
*/
public void addExtension(String extension){
if(extension == null){
throw new NullPointerException("The extension can't be null.");
}
extensions.add(extension);
}
/**
* Remove the selected extension
*
* @param extension Extensions of files accepted by the filter
*/
public void removeExtension(String extension){
extensions.remove(extension);
}
/**
* Clear all the extensions
*/
public void clearExtensions(){
extensions.clear();
}
/**
* Get the list of extensions
*/
public List<String> getExtensions(){
return extensions;
}
} |
Et enfin l'utilisation de mon JFileChooser qui plante :
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private void userSelectFiles(){
//creates the list of file
ArrayList<String> alf = new ArrayList<String>();
alf=null;
//creates the Filechooser
int ret = myChoice.showOpenDialog(null);
//myChoice.showOpenDialog(null);
if(ret == JFileChooser.APPROVE_OPTION){
//One or more file are selected
for (File fs : myChoice.getSelectedFiles()){
String path = fs.getPath();
alf.add(path);
}
}
} |
Je pense qu'il doit y avoir une belle erreur de débutant dessous mais je voit pas :(
Edit : voici l'init :
Code:
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//init Filechooser
FileSystemView vueSysteme = FileSystemView.getFileSystemView(); //recovery of Directories
File defaut = vueSysteme.getDefaultDirectory();
File home = vueSysteme.getHomeDirectory(); // end recovery of Directories
FileFilterExtend filtre = new FileFilterExtend("Xml Files");//configure extension Filter
filtre.addExtension(".xml");
JFileChooser myChoice = new JFileChooser(".");
myChoice.addChoosableFileFilter(filtre);//end configure extension Filter
myChoice.setMultiSelectionEnabled(true) ;//enable MultiSelection
myChoice.setCurrentDirectory(new File("/"));//display all disks
myChoice.changeToParentDirectory();//end display all disks |
