window 窗口编辑

  1 package com.chuangkohua;
  2 
  3 import java.awt.FileDialog;
  4 import java.awt.FlowLayout;
  5 import java.awt.Frame;
  6 import java.awt.Menu;
  7 import java.awt.MenuBar;
  8 import java.awt.MenuItem;
  9 import java.awt.TextArea;
 10 import java.awt.event.ActionEvent;
 11 import java.awt.event.ActionListener;
 12 import java.awt.event.WindowAdapter;
 13 import java.awt.event.WindowEvent;
 14 import java.io.BufferedReader;
 15 import java.io.File;
 16 import java.io.FileNotFoundException;
 17 import java.io.FileReader;
 18 import java.io.IOException;
 19 
 20 public class Menus {
 21 
 22     
 23 
 24     public static void main(String[] args) {
 25         // TODO Auto-generated method stub
 26         Demo3 demo3 = new Demo3();
 27         demo3.init();
 28         
 29 
 30     }
 31 
 32 }
 33 
 34 class Demo3{
 35     private Frame frame;
 36     private TextArea area;
 37     private MenuBar bar;
 38     private Menu menu,submenu,submenu2;
 39     private MenuItem item,saveitem,item2,item3,item4,item41,item5,subitem;
 40     private FileDialog dialog,dialog2;
 41     
 42     public void init(){
 43         frame = new Frame("我的电脑");
 44         frame.setBounds(300, 100, 500, 600);
 45         frame.setLayout(new FlowLayout());
 46         area = new TextArea();
 47         bar = new MenuBar();
 48         menu = new Menu("文件");
 49         submenu = new Menu("子菜单");
 50         subitem = new MenuItem("子条目");
 51         item = new MenuItem("关闭");
 52         item2 = new MenuItem("打开");
 53         saveitem = new MenuItem("保存");
 54         //利用关闭选项关闭对话框
 55         item.addActionListener(new ActionListener() {
 56             
 57             @Override
 58             public void actionPerformed(ActionEvent e) {
 59                 // TODO Auto-generated method stub
 60                 System.exit(0);
 61             }
 62         });
 63         
 64         Menu menu1 = new Menu("编辑");
 65         item3 = new MenuItem("复制");
 66         submenu2 = new Menu("粘贴");
 67         item4 = new MenuItem("仅粘贴文字");
 68         item41 = new MenuItem("粘贴格式文字");
 69         
 70         
 71         Menu menu2 = new Menu("查看");
 72         item5 = new MenuItem("放大");
 73         
 74         dialog = new FileDialog(frame, "保存", FileDialog.SAVE);
 75         saveitem.addActionListener(new ActionListener() {
 76             
 77             @Override
 78             public void actionPerformed(ActionEvent e) {
 79                 // TODO Auto-generated method stub
 80                 dialog.setVisible(true);
 81             }
 82         });
 83          
 84         dialog2 = new FileDialog(frame, "打开", FileDialog.LOAD);
 85           item2.addActionListener(new ActionListener() {
 86             
 87             @Override
 88             public void actionPerformed(ActionEvent e) {
 89                 // TODO Auto-generated method stub
 90                 dialog2.setVisible(true);
 91                 String dirpath = dialog2.getDirectory();
 92                 String filename = dialog2.getFile();
 93                 if(dirpath==null||filename==null){
 94                     return;
 95                 }else{
 96                     area.setText("");;
 97                     File file = new File(dirpath, filename);
 98                     try {
 99                         BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
100                         String str =null;
101                         while((str = bufferedReader.readLine())!=null){
102                             area.append(str+"\r\n");
103                         }
104                         bufferedReader.close();
105                     } catch (FileNotFoundException e1) {
106                         // TODO Auto-generated catch block
107                         e1.printStackTrace();
108                     } catch (IOException e2){
109                         e2.printStackTrace();
110                     }
111                     
112                 }
113             }
114         });
115         //文件菜单
116         submenu.add(subitem);
117         menu.add(submenu);
118         menu.add(item2);
119         menu.add(item);
120         menu.add(saveitem);
121         //编辑菜单
122         submenu2.add(item4);
123         submenu2.add(item41);
124         menu1.add(item3);
125         menu1.add(submenu2);
126         //查看菜单
127         menu2.add(item5);
128         
129         bar.add(menu);
130         bar.add(menu1);
131         bar.add(menu2);
132         
133         frame.setMenuBar(bar);
134         frame.add(area);
135         frame.setVisible(true);
136         
137         frame.addWindowListener(new WindowAdapter() {
138             public void windowClosing(WindowEvent e){
139                 System.exit(0);
140             }
141         });
142     }
143 }