void store() {
   // TODO store modified settings
   // Example:
   // Preferences.userNodeForPackage(CorePanel.class).putBoolean("someFlag",
   // someCheckBox.isSelected());
   // or for org.openide.util with API spec. version >= 7.4:
   // NbPreferences.forModule(CorePanel.class).putBoolean("someFlag", someCheckBox.isSelected());
   // or:
   // SomeSystemOption.getDefault().setSomeStringProperty(someTextField.getText());
   GlobalPreferences preferences = GlobalPreferences.sharedInstance();
   preferences.setMonitoredHostPoll((Integer) monitoredHostPSpinner.getValue());
   preferences.setMonitoredDataPoll((Integer) monitoredDataPSpinner.getValue());
   preferences.setThreadsPoll((Integer) threadsPSpinner.getValue());
   preferences.setMonitoredHostCache((Integer) monitoredHostCSpinner.getValue());
   preferences.setMonitoredDataCache((Integer) monitoredDataCSpinner.getValue());
   preferences.store();
 }