Combobox更新另一个Combobox Java

Question

尝试使用第一个组合选择填充另一个组合框。我不确定为什么这不起作用。想法？

    DefaultComboBoxModel typeModel = new DefaultComboBoxModel(new String[] 
    {"Select Type", "Food", "Drink", "Merchandise"});

    typeComboBox.setModel(typeModel);

    typeComboBox.addItemListener(new ItemListener() {
        @Override
        public void itemStateChanged(ItemEvent e) {
            String type = String.valueOf(typeComboBox.getSelectedItem()).trim();
            DefaultComboBoxModel drinkModel = new DefaultComboBoxModel(new String[] {"Select Subtype", "Cocktail", "Bottle Beer", "Draft Beer", "Wine", "N/A"});
            DefaultComboBoxModel foodModel = new DefaultComboBoxModel(new String[] {"Select Subtype", "Entree", "Appetizer", "Dessert", "Soup", "Side", "Misc", "Special", "Salad"});
            DefaultComboBoxModel merchModel = new DefaultComboBoxModel(new String[] {"Select Subtype", "Clothing", "Misc", "Gift Card", "Glassware"});
            switch (type) {
                case "Food":
                    subtypeComboBox.setModel(foodModel);
                case "Drink":
                    subtypeComboBox.setModel(drinkModel);
                case "Merchandise":
                    subtypeComboBox.setModel(merchModel);
                default:
                    subtypeComboBox.setModel(new DefaultComboBoxModel());
            }
        }
    });