testmenuitems.java

来自「java2 primer plus一书源程序」· Java 代码 · 共 101 行

/*
 * TestMenuItems.java
 *
 * Created on July 30, 2002, 2:36 PM
 */

package com.samspublishing.jpp.ch13;
import java.awt.*;
import java.awt.event.*;

/**
 *
 * @author  Stephen Potts
 * @version
 */
public class TestMenuItems extends Frame implements ActionListener
{
   MenuBar mBar;
   Menu breadMenu, toastMenu;
   Menu helpMenu;
      
   TextField tField;
   
   /** Creates new TestMenuItems*/
   public TestMenuItems()
   {
      breadMenu = new Menu("Bread");
      
      MenuItem tempMenuItem;
      
      tempMenuItem = new MenuItem("White");
      tempMenuItem.addActionListener(this);
      breadMenu.add(tempMenuItem);
      
      tempMenuItem = new MenuItem("Wheat");
      tempMenuItem.addActionListener(this);
      breadMenu.add(tempMenuItem);
      
      tempMenuItem = new MenuItem("Rye");
      tempMenuItem.addActionListener(this);
      breadMenu.add(tempMenuItem);
      
      
      
      toastMenu = new Menu("Toast");

      tempMenuItem = new MenuItem("Light");
      tempMenuItem.addActionListener(this);
      toastMenu.add(tempMenuItem);
      
      tempMenuItem = new MenuItem("Medium");
      tempMenuItem.addActionListener(this);
      toastMenu.add(tempMenuItem);
 
      tempMenuItem = new MenuItem("Dark");
      tempMenuItem.addActionListener(this);
      toastMenu.add(tempMenuItem);
 
      mBar = new MenuBar();
      mBar.add(breadMenu);
      mBar.add(toastMenu);
      
      helpMenu = new Menu("Help");
      helpMenu.add(new MenuItem("help"));
      
      mBar.setHelpMenu(helpMenu);
      
      tField = new TextField(" ",30);
      
      setLayout(new FlowLayout());
      add(tField);
      
      setMenuBar(mBar);
      
      addWindowListener(new WinCloser());
      setTitle("Using Menu Bars");
      setBounds( 100, 100, 300, 300);
      setVisible(true);
   }
   
   public void actionPerformed(ActionEvent ae)
   {
      String cmd = ae.getActionCommand();
      tField.setText("you selected: " + cmd);
   }
      
   public static void main(String[] args)
   {
      TestMenuItems tmi = new TestMenuItems();
   }
   
}

class WinCloser extends WindowAdapter
{
   public void windowClosing(WindowEvent e)
   {
      System.exit(0);
   }
}