menu.java~18~

java2参考大全上的例子的源码和自己的理解.

package menu;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Menu extends JFrame{
  public static void main(String[] args) {
    Menu menu = new Menu();
  }

    public void  Menu(){

       // 创建菜单条
       JMenuBar mb = new JMenuBar();
       setJMenuBar(mb);

       //创建菜单
       JMenu MenuFile = new JMenu("File");
       JMenu MenuEdit = new JMenu("Edit");

       mb.add(MenuFile);
       mb.add(MenuEdit);

       //创建菜单项
       JMenuItem mi1 = new JMenuItem("new");
       JMenuItem mi2 = new JMenuItem("open");
       JMenuItem mi3 = new JMenuItem("save");
       JMenuItem mi4 = new JMenuItem("close");
       MenuFile.add(mi1);
       MenuFile.add(mi2);
       MenuFile.add(mi3);
       MenuFile.add(mi4);
     }

     //(类Frame中的方法)
     public Menu() {
     }

     public boolean action(Event e, Object arg) {
       if (e.target instanceof JMenuItem) {
         MenuItem selected = (MenuItem) e.target;
         String s = selected.getLabel();
         //   switch  (s) {
         //  case "new":  ;
         //  case "open":  ;
         //  case "save":  ;
         //  case "close":  ;
         //  }
       }
       return true;
     }

   }