calcmenu.java

Java 语言实现的计算器

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package calcpackage;

/**
 *
 * @author Yuyin Li
 */
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CalcMenu implements ActionListener{
 
 private JFrame menuFrame=null;
 
 private JMenuBar myMenuBar=null;
 
 private JMenu Menu_File=null;
 private JMenuItem File_Exit;
 
 private JMenu Menu_View=null;
 private JMenuItem View_Doc=null;
 
 private JMenu Menu_Help=null;
 private JMenuItem Help_Doc, Help_About;
 
 public CalcMenu(JFrame menuFrame)
 {
  this.menuFrame=menuFrame;
  init();
 }
 
 public void init()
 {
  myMenuBar=new JMenuBar();
  menuFrame.setJMenuBar(myMenuBar);
  AddMenu();
  menuFrame.setVisible(true); 
  AddListener();
 }
 
 private void AddMenu()
 {
  Menu_File=new JMenu("文件");
  myMenuBar.add(Menu_File);
  Menu_File.add(File_Exit=new JMenuItem("退出"));
  
  Menu_View=new JMenu("查看");
  myMenuBar.add(Menu_View);
  Menu_View.add(View_Doc=new JMenuItem("设计报告"));
  
  Menu_Help=new JMenu("帮助");
  myMenuBar.add(Menu_Help);
  Menu_Help.add(Help_Doc=new JMenuItem("说明文档"));
  Menu_Help.add(Help_About=new JMenuItem("制作人员"));  
 }
 
 private void AddListener()
 {
  File_Exit.addActionListener(this);
  View_Doc.addActionListener(this);
  Help_Doc.addActionListener(this);
  Help_About.addActionListener(this);
 }
 
 public void actionPerformed(ActionEvent e)
 {
  String Command=e.getActionCommand();
  
  if(e.getSource() instanceof JMenuItem)
  {
   if(Command.equals("制作人员"))
   {
    JOptionPane.showMessageDialog(null,"Java程序设计-计算器\n计算机科学与技术九班\n黄平 3105007170","关于",JOptionPane.OK_OPTION);
   }
   if(Command.equals("退出"))
   {
    System.exit(0);    
   }
   if(Command.equals("说明文档"))
   {
    Runtime Rn=Runtime.getRuntime();
    try{
     Rn.exec("notepad Readme.txt");//调用系统的记事本
       }catch(Exception e2){
        JOptionPane.showMessageDialog(null,"调用记事本程序失败!","错误",JOptionPane.ERROR_MESSAGE);
       }
   }
   if(Command.equals("设计报告"))
   {
    JOptionPane.showMessageDialog(null,"设计报告在文件夹根目录!","提示",JOptionPane.OK_OPTION);
   }
  }
 }
}