我有两个类，一个包含两个组合框的监听器类和一个监听两个组合框的监听器类。该软件是关于披萨的，而组合框的选择是披萨类型和数量，我会发布相关的代码。

(gui class)

private Listener listen = new Listener();

private JComboBox chooseItem = new JComboBox();

private JComboBox quantity = new JComboBox();

private String[] selection = {"Choose a Pizza","Margherita", "Pepperoni", "Four Seasons", "Chips", "Garlic Bread", "Potato Wedges", "Cocacola", "Orange Juice", "Lemonade"};

private String[] qSelection = {"0","1","2","3","4","5","6","7","8","9","10"};

private void comboBoxs() {

choosePizza = new JComboBox(selection);

chooseItem.setSelectedIndex(0);

panel.add(choosePizza);

choosPizza.addActionListener(listener);

quantity = new JComboBox(qSelection);

quantity.setSelectedIndex(0);

panel.add(quantity);

quantity.addActionListener(listener);

}在监听器类中，我被卡住了，至今还没有找到解决方案。我必须使用ActionListener，但我不确定我是如何区分这两个组合框的。

(listener class)

public void actionPerformed(ActionEvent event) {

if (actionCommand.equals("Confirm")) {

String q = new String();

String d = new String();

d = description;

q = quantity;

}

else {

JComboBox cbq = (JComboBox)event.getSource();

String itemNumber = (String)cbq.getSelectedItem();

getQuantity(itemNumber);

JComboBox cb = (JComboBox)event.getSource();

String name = (String)cb.getSelectedItem();

getItemName(name);

}

}

public String getItemName(String name) {

description = new String();

description = name;

return name;

}

public String getQuantity(String itemNumber){

quantity = new String();

quantity = itemNumber;

return itemNumber;

}因此，总结一下：当我在两个JComboBox中选择值时，我希望能够在“description”字符串中存储选定的chooseItem JComboBox项目，并在“quantity”字符串中存储所选数量的JComboBox项目。

目前，chooseItem JComboBox所选项目显示为两个值，并且数量完全不显示。 (实际上，这与前面使用的最后一个盒子出现在描述字符串中并且数量指向空值时一样。)

我在网上找到的所有例子都只涉及带有单个JComboBox的ActionListener，我一直试图让它工作几个小时，但没有运气，我完全被卡住了。