window 窗口编辑

package com.chuangkohua;

import java.awt.FileDialog;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class Menus {

public static void main(String[] args) {
// TODO Auto-generated method stub
Demo3 demo3 = new Demo3();
demo3.init();

}

}

class Demo3{
private Frame frame;
private TextArea area;
private MenuBar bar;
private Menu menu,submenu,submenu2;
private MenuItem item,saveitem,item2,item3,item4,item41,item5,subitem;
private FileDialog dialog,dialog2;

public void init(){
frame = new Frame("我的电脑");
frame.setBounds(300, 100, 500, 600);
frame.setLayout(new FlowLayout());
area = new TextArea();
bar = new MenuBar();
menu = new Menu("文件");
submenu = new Menu("子菜单");
subitem = new MenuItem("子条目");
item = new MenuItem("关闭");
item2 = new MenuItem("打开");
saveitem = new MenuItem("保存");
//利用关闭选项关闭对话框
item.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});

Menu menu1 = new Menu("编辑");
item3 = new MenuItem("复制");
submenu2 = new Menu("粘贴");
item4 = new MenuItem("仅粘贴文字");
item41 = new MenuItem("粘贴格式文字");

Menu menu2 = new Menu("查看");
item5 = new MenuItem("放大");

dialog = new FileDialog(frame, "保存", FileDialog.SAVE);
saveitem.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
dialog.setVisible(true);
}
});

dialog2 = new FileDialog(frame, "打开", FileDialog.LOAD);
item2.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
dialog2.setVisible(true);
String dirpath = dialog2.getDirectory();
String filename = dialog2.getFile();
if(dirpath==null||filename==null){
return;
}else{
area.setText("");;
File file = new File(dirpath, filename);
try {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
String str =null;
while((str = bufferedReader.readLine())!=null){
area.append(str+"\r\n");
}
bufferedReader.close();
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e2){
e2.printStackTrace();
}

}
}
});
//文件菜单
submenu.add(subitem);
menu.add(submenu);
menu.add(item2);
menu.add(item);
menu.add(saveitem);
//编辑菜单
submenu2.add(item4);
submenu2.add(item41);
menu1.add(item3);
menu1.add(submenu2);
//查看菜单
menu2.add(item5);

bar.add(menu);
bar.add(menu1);
bar.add(menu2);

frame.setMenuBar(bar);
frame.add(area);
frame.setVisible(true);

frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
}