提供了常用的JAVA技术的示例

				package TestMenu;								import java.awt.*;				import java.awt.event.*;				import java.awt.Frame;				import javax.swing.ImageIcon;								public class TestMenu {				    private Frame f=new Frame("多级菜单示例");				    private Menu m1=new Menu("文件");				    private Menu m2=new Menu("编辑");				    private Menu mhelp=new Menu("帮助");				    private MenuBar mb=new MenuBar();				    private MenuItem mi11=new MenuItem("新建");				    private MenuItem mi12=new MenuItem("打开");				    private MenuItem mi13=new MenuItem("保存");				    private MenuItem mi21=new MenuItem("查找");				    private MenuItem mih=new MenuItem("帮助文件");				    CheckboxMenuItem mi22=new CheckboxMenuItem("工具");								    public TestMenu() {				        m1.add(mi11);				        m1.add(mi12);				        m1.add(mi13);				        m1.addSeparator(); // 分 隔 符				        m1.add(m2);				        m2.add(mi21);				        m2.add(mi22);												        f.setMenuBar(mb);				       // f.setIconImage();				        f.setIconImage(new ImageIcon("javaIcon.gif").getImage());				        mb.add(m1);				        mb.setHelpMenu(mhelp);				        mhelp.add(mih);				        f.setSize(200,200);				        f.addWindowListener(new WindowAdapter(){				            public void windowClosing(WindowEvent e){System.exit(0);}				            });				        f.setVisible(true);				    }				    public static void main(String[] args) {				      TestMenu testMenu1 = new TestMenu();				    }				}