/** Requests and displays all packages older than the date in the text field */
 private void buttonOldPackagesActionPerformed(ActionEvent event) {
   try {
     queryTime.setTime(dateFormatter.parse(jTextDate.getText().replace("-", "") + "2359"));
     this.packages = DataAdapter.getOlderPackages(queryTime);
     jListPackages.setListData(new Vector(this.packages));
     jButtonSetLost.setEnabled(this.packages.size() > 0);
     jButtonSetFound.setEnabled(false);
     jListScans.setListData(new Vector());
   } catch (Exception ex) {
     JOptionPane.showMessageDialog(this, "Invalid date entered");
   }
 }