How to untoggle jtogglebuttons on second click that belongs to ButtonGroups

How to untoggle jtogglebuttons that belongs to ButtonGroups on second click? What listener should I use for this? Thanks!

JtoggleButton toggleButton;

toggleButton.addActionListener? toggleButton.addChangeListener?

public class CustomButtonGroup extends ButtonGroup {
  @Override
  public void setSelected(ButtonModel model, boolean selected) {
    if (selected) {
      super.setSelected(model, selected);
    } else {
      clearSelection();
    }
  }
}