import java.awt.*;
import java.awt.event.*;

public class Yk extends Frame
{
    MenuBar bar;
    Menu B;
    MenuItem build,open,save,exit;
    MenuBar bar1;
    Menu C;
    MenuItem calculator,calendar,clock;

    Yk(String s)
        {
            bar=new MenuBar();
            B=new Menu("文件");
            build=new MenuItem("新建");
            open=new MenuItem("打开");
            save=new MenuItem("保存");
            exit=new MenuItem("退出");
            bar1=new MenuBar();
            C=new Menu("操作");
            calculator=new MenuItem("计算器");
            calendar=new MenuItem("日历");
            clock=new MenuItem("时钟");


            setMenuBar(bar);
            bar.add(B);
            B.add(build);
            B.addSeparator();
            B.add(open);
            B.addSeparator();
            B.add(save);
            B.addSeparator();
            B.add(exit);
            bar.add(C);
            C.add(calculator);
            C.addSeparator();
            C.add(calendar);
            C.addSeparator();
            C.add(clock);
            C.addSeparator();
            addWindowListener(new WindowAdapter()
            {public void windowClosing(WindowEvent e)
            {
            System.exit(0);
            }
            }
            );
            setBounds(200,50,800,600);
            setVisible(true);
            setResizable(false);
            
            if(C==calculator)
            {
            }
//Calculator1=new Calculator1();
        }


        public static void main(String agrs[])
        {
            new Yk("简单事件编辑器");
        }
}

请注意，标题栏出来了。