JComboBoxのドロップダウンリストでカーソルキーナビゲーションを無効にする

String key1 = "ComboBox.noActionOnKeyNavigation";
JCheckBox check1 = new JCheckBox(key1, UIManager.getBoolean(key1));
check1.addActionListener(e -> {
  JCheckBox c1 = (JCheckBox) e.getSource();
  UIManager.put(key1, c1.isSelected());
});

String key2 = "ComboBox.isEnterSelectablePopup";
JCheckBox check2 = new JCheckBox(key2, UIManager.getBoolean(key2));
check2.addActionListener(e -> {
  JCheckBox c2 = (JCheckBox) e.getSource();
  UIManager.put(key2, c2.isSelected());
});

JComboBox<String> combo1 = new JComboBox<>(makeModel());
combo1.setEditable(false);

JComboBox<String> combo2 = new JComboBox<>(makeModel());
combo2.setEditable(true);