Java AWT的菜单实例演示

package com.jtang.zhe.java;
import java.awt.*;
import java.awt.event.*;

import java.awt.CheckboxMenuItem;
import java.awt.Frame;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.MenuShortcut;
import java.awt.PopupMenu;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;


public class SimpleMenu {
	   private Frame f=new Frame("测试");
	    private MenuBar mb=new MenuBar();
	    PopupMenu pop=new PopupMenu();
	    Menu file=new Menu("文件");
	    Menu edit=new Menu("编辑");
	    MenuItem newItem=new MenuItem("新建");
	    MenuItem saveItem=new MenuItem("保存");
	    //创建exitItem菜单项，指定使用Ctrl+X快捷键
	    MenuItem exitItem=new MenuItem("退出",new MenuShortcut(KeyEvent.VK_X));
	    CheckboxMenuItem autoWrap=new CheckboxMenuItem("自动换行");
	    MenuItem copyItem=new MenuItem("复制");
	    MenuItem pasteItem=new MenuItem("粘贴");
	    Menu format=new Menu("格式");
	    //创建commentItem菜单项，指定使用Ctrl+Shift+/快捷键
	    MenuItem commentItem=new MenuItem("注释",new MenuShortcut(KeyEvent.VK_SLASH,true));
	    MenuItem cancelItem=new MenuItem("取消注释");
	    //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	    CheckboxMenuItem autoWrap1=new CheckboxMenuItem("自动换行");
	    MenuItem copyItem1=new MenuItem("复制");
	    MenuItem pasteItem1=new MenuItem("粘贴");
	    Menu format1=new Menu("格式");
	    //创建commentItem1菜单项
	    MenuItem commentItem1=new MenuItem("注释");
	    MenuItem cancelItem1=new MenuItem("取消注释");
	    //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	    private TextArea ta=new TextArea(6,40);
	    public void init()
	    {
	        //以匿名内部类的形式创建菜单******
	        ActionListener menuListener=new ActionListener()
	        {
	            public void actionPerformed(ActionEvent e)
	            {
	                String cmd=e.getActionCommand();
	                ta.append("单击'"+cmd+"'菜单"+"\n");
	                if(cmd.equals("退出"))
	                {
	                    System.exit(0);
	                }
	            }
	        };
	        commentItem.addActionListener(menuListener);
	        //
	        commentItem1.addActionListener(menuListener);
	        exitItem.addActionListener(menuListener);
	        //为file菜单添加菜单项
	        file.add(newItem);
	        file.add(saveItem);
	        file.add(exitItem);
	        //为edit菜单添加菜单项
	        edit.add(autoWrap);
	        //使用addSeparator方法来添加菜单分隔线
	        edit.addSeparator();
	        edit.add(copyItem);
	        edit.add(pasteItem);
	        //为format菜单添加菜单项
	        format.add(commentItem);
	        format.add(cancelItem);
	        //------------------------------------------------------------
	        //为format1菜单添加菜单项
	        format1.add(commentItem1);
	        format1.add(cancelItem1);
	        //------------------------------------------------------------
	        //使用添加new MenuItem("-")的方式添加菜单分隔线
	        edit.add(new MenuItem("-"));
	        //将format菜单组合到edit菜单中，从而形成二级菜单
	        edit.add(format);
	        //============================================================
	        //为pop菜单添加菜单项
	        pop.add(autoWrap1);
	        //使用addSeparator方法来添加菜单分隔线
	        pop.addSeparator();
	        pop.add(copyItem1);
	        pop.add(pasteItem1);
	        pop.add(new MenuItem("-"));
	        pop.add(format1);
	        ta.add(pop);
	        ta.addMouseListener(new MouseAdapter(){
	            public void mouseReleased(MouseEvent e)
	            {
	                if(e.isPopupTrigger())
	                {
	                    pop.show(ta,e.getX(),e.getY());
	                }
	            }
	        });
	        //============================================================
	        //将file、edit菜单添加到mb菜单条中
	        mb.add(file);
	        mb.add(edit);
	        //为f窗口设置菜单条
	        f.setMenuBar(mb);
	        //以匿名内部类的形式来创建事件******对象
	        f.addWindowListener(new WindowAdapter(){
	            public void windowClosing(WindowEvent e)
	            {
	                ta.append("用户试图关闭窗口!\n");
	                System.exit(0);
	            }
	        });
	        f.add(ta);
	        f.pack();
	        f.setVisible(true);
	    }
	    public static void main(String[] args)
	    {
	        new SimpleMenu().init();
	    }

}