你Win7中的Jar包能执行吗？ - 黑马程序员技术交流社区

package mymenu;
import java.awt.Frame;
import java.awt.MenuBar;
import java.awt.Menu;
import java.awt.MenuItem;
import java.awt.TextArea;
import java.awt.FileDialog;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.File;
public class MyFileDialogDemo
{
private Frame f;
private MenuBar bar;
private Menu file;
private MenuItem openItem,saveItem,exitItem;
private TextArea ta;
private FileDialog fdLoad,fdSave;
private File fl;
MyFileDialogDemo()
{
initialize();
}
public void initialize()
{
f = new Frame("WhatEver");
f.setBounds(300,200,600,500);
f.setVisible(true);
bar = new MenuBar();
file = new Menu("文件");
openItem = new MenuItem("打开");
saveItem = new MenuItem("保存");
exitItem = new MenuItem("退出");
ta = new TextArea();
fdLoad = new FileDialog(f,"打开",FileDialog.LOAD);
fdSave = new FileDialog(f,"保存",FileDialog.SAVE);
f.setMenuBar(bar);
f.add(ta);
bar.add(file);
file.add(openItem);
file.add(saveItem);
file.add(exitItem);
myEvent();
}
public void myEvent()
{
f.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
saveItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if(fl==null)
{
fdSave.setVisible(true);
String path = fdSave.getDirectory();
String name = fdSave.getFile();
if(path==null || name==null)
return;
fl = new File(path+name);
}
try
{
BufferedWriter bw = new BufferedWriter(new FileWriter(fl));
String text = ta.getText();
bw.write(text);
bw.close();
}
catch (IOException ex)
{
throw new RuntimeException("保存失败");
}
}
});
exitItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
openItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
fdLoad.setVisible(true);
String path = fdLoad.getDirectory();
String name = fdLoad.getFile();
if(path==null || name==null)
return;
ta.setText("");
try
{
BufferedReader br = new BufferedReader(new FileReader(path+name));
String line;
while((line=br.readLine())!=null)
{
ta.append(line+"\r\n");
}
br.close();
}
catch (IOException ex)
{
throw new RuntimeException("打开失败");
}
}
});
}
public static void main(String[] args)
{
new MyFileDialogDemo();
}
}

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