list.addComponentListener(componentListener);
  void installListeners()  {    list.addFocusListener(focusListener);    list.getModel().addListDataListener(listDataListener);    list.addListSelectionListener(listSelectionListener);    list.addMouseListener(mouseInputListener);    list.addMouseMotionListener(mouseInputListener);    list.addPropertyChangeListener(propertyChangeListener);  }