How to use

openFileDialog

method

in

javax.jnlp.FileOpenService

/**
 * Open this file.
 * @return
 */
public InputStream openFileStream(String pathHint, String[] extensions)
{
  if (fos == null)
  {
    try { 
      fos = (FileOpenService)ServiceManager.lookup("javax.jnlp.FileOpenService"); 
    } catch (UnavailableServiceException e) { 
      fos = null; 
    }
  }
  if (fos != null) { 
    try { 
      // ask user to select a file through this service 
      FileContents fc = fos.openFileDialog(pathHint, extensions);
      return fc.getInputStream();
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
  } 
  return null;
}

/**
 * Loads the file via the JNLP FileOpen service
 */
public int loadFile(Spreadsheet sheet) {
  final Controller controller = getController();
  try { 
    FileOpenService fos = (FileOpenService)
      ServiceManager.lookup("javax.jnlp.FileOpenService"); 
    if (fos == null) {
      return Controller.CANCEL_OPTION;
    }
       // ask user to select a file through this service 
    _fc = fos.openFileDialog(null, null);
    if (_fc == null)
      return Controller.CANCEL_OPTION;
    
    sheet.readSpreadsheet(_fc.getInputStream());
    controller.setSheetSource(new URL("file:///"+_fc.getName()));
    controller.setSheetDirty(false);
    return Controller.YES_OPTION;
  }
  catch (Exception x) {
    displayError(x);
    return Controller.CANCEL_OPTION;
  }
}