有关jcombobox的问题，急求！！！
现在我想写一个下拉框，运行后通过点击下拉框，来给这个下拉框添加 项。请高手们指导，该如何解决。拜求大虾们指导！！！

[解决办法]
你可以看看那这个

Java code

import java.awt.*;import java.awt.event.*;import javax.swing.*;/** * @version 1.33 2007-06-12 * @author Cay Horstmann */public class ComboBoxTest{   public static void main(String[] args)   {      EventQueue.invokeLater(new Runnable()         {            public void run()            {               ComboBoxFrame frame = new ComboBoxFrame();               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);               frame.setVisible(true);            }         });   }}/** * A frame with a sample text label and a combo box for selecting font faces. */class ComboBoxFrame extends JFrame{   public ComboBoxFrame()   {      setTitle("ComboBoxTest");      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);      // add the sample text label      label = new JLabel("The quick brown fox jumps over the lazy dog.");      label.setFont(new Font("Serif", Font.PLAIN, DEFAULT_SIZE));      add(label, BorderLayout.CENTER);      // make a combo box and add face names      faceCombo = new JComboBox();      faceCombo.setEditable(true);      faceCombo.addItem("Serif");      faceCombo.addItem("SansSerif");      faceCombo.addItem("Monospaced");      faceCombo.addItem("Dialog");      faceCombo.addItem("DialogInput");      // the combo box listener changes the label font to the selected face name      faceCombo.addActionListener(new ActionListener()         {            public void actionPerformed(ActionEvent event)            {               label.setFont(new Font((String) faceCombo.getSelectedItem(), Font.PLAIN,                     DEFAULT_SIZE));            }         });      // add combo box to a panel at the frame's southern border      JPanel comboPanel = new JPanel();      comboPanel.add(faceCombo);      add(comboPanel, BorderLayout.SOUTH);   }   public static final int DEFAULT_WIDTH = 300;   public static final int DEFAULT_HEIGHT = 200;   private JComboBox faceCombo;   private JLabel label;   private static final int DEFAULT_SIZE = 12;}