java 添加JMenu例子

import java.awt.*;import javax.swing.*;import java.awt.event.*;public class MyJMenu{JFrame myFrame;JMenuBar menubar;JMenu file,edit,view,viewSub,about;JMenuItem newFile,openFile,saveFile,exit,copy,pause,full,part,viewSub_full,viewSub_part,author,help;public MyJMenu(){myFrame=new JFrame("Chevi.C J Menu");myFrame.setSize(200,300);myFrame.setLocation(400,400);myFrame.setVisible(true);//利用事件监听关闭.myFrame.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){System.exit(0);}});menubar=getMenu();//注意,是setJMenuBar(),二不是awt的setMenuBar()...!!!!myFrame.setJMenuBar(menubar);}//菜单设置public JMenuBar getMenu(){menubar=new JMenuBar();file=new JMenu("file");edit=new JMenu("edit");view=new JMenu("view");viewSub=new JMenu("viewSon");about=new JMenu("about");newFile=new JMenuItem("new a file..");openFile=new JMenuItem("open a file..");saveFile=new JMenuItem("save..");exit=new JMenuItem("exit");file.add(newFile);file.add(openFile);file.add(saveFile);//添加分割线,和awt中的不同,awt中的菜单项可以用"-"表示分割线.file.addSeparator();file.add(exit);menubar.add(file);copy=new JMenuItem("copy");pause=new JMenuItem("pause");edit.add(copy);edit.add(pause);menubar.add(edit);full=new JMenuItem("full screen");part=new JMenuItem("window style");view.add(full);view.add(part);viewSub_full=new JMenuItem("second full");viewSub_part=new JMenuItem("second part");viewSub.add(viewSub_full);viewSub.add(viewSub_part);//Menu add Menu......view.add(viewSub);menubar.add(view);author=new JMenuItem("about Author");help=new JMenuItem("help");about.add(author);about.add(help);menubar.add(about);return menubar;}public static void main(String[] args)//~!@{new MyJMenu();}};