import?java.awt.BorderLayout;
import?java.awt.event.ActionEvent;
import?java.awt.event.ActionListener;
import?javax.swing.Jframe;
import?javax.swing.JMenu;
import?javax.swing.JLabel;
import?javax.swing.JTextField;
import?javax.swing.JTextArea;
import?javax.swing.JRadioButton;
import?javax.swing.JComboBox;
import?javax.swing.DefaultListModel;
import?javax.swing.*;
import?javax.swing.JCheckBox;
import?javax.swing.JMenuBar;
import?java.awt.GridLayout;
import?java.awt.FlowLayout;
import?javax.swing.JMenuItem;
import?javax.swing.JOptionPane;
public?class?JMenuDemo?extends?Jframe?{
	public?JMenuDemo（）{
		
		
		setSize（300300）;
		setLocation（400400）;
????????????????settitle（“09級專升本2班李保珠“）;
		setDefaultCloseOperation（Jframe.EXIT_ON_CLOSE）;
		setLayout（new?BorderLayout（））;
		
		JMenuItem?item1=new?JMenuItem（“子菜單一“）;
		JMenuItem?item2=new?JMenuItem（“子菜單二“）;????????????????????????????
		JMenuItem?item3=new?JMenuItem（“退出“）;		
		
		item2.addActionListener（new?ActionListener（）{
			public?void?actionPerformed（ActionEvent?e）{
				JOptionPane.showMessageDialog（null“點擊了“）;
				}
			}）;
			
			
			JMenuBar?menuBar=new?JMenuBar（）;
			
			
			JMenu?menu1=new?JMenu（“菜單一“）;
			menu1.add（item1）;
			menu1.add（item2）;
			JMenu?men