code: public String getDescription() {
          if (fullDescription == null) {
              if (description == null || isExtensionListInDescription()) {
                  fullDescription =
                        description == null ? "(" : description + " (";    // Construit la description a partir des extentions.
                  Enumeration<String> extensions = filters.keys();
                  if (extensions != null) {
                      fullDescription += "." + extensions.nextElement();
                      while (extensions.hasMoreElements()) {
                          fullDescription += ", ." + extensions.nextElement();
                      }
                  }
                  fullDescription += ")";
              } else {
                  fullDescription = description;
              }
          }
          return fullDescription;
      }
docs: Retourne une representation humainement lisible de la description de ce filtre. Par
  example: "JPEG and GIF Image Files (*.jpg, *.gif)"
  
  @see #setDescription
  @see #setExtensionListInDescription
  @see #isExtensionListInDescription