Java-GUI(jar包双击执行)

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带包编译：D:\a\day0814>javac -d d:\a\ MyMenuTest.java
进行打包：D:\a>jar -cvf my.jar mymenu
带清单文件的打包：D:\a>jar -cvfm my.jar 1.txt mymenu
package mymenu;import java.awt.*;import java.awt.event.*;import java.io.*;public class MyMenuTest{    private Frame f;    private MenuBar bar;    private TextArea ta;    private Menu fileMenu;    private MenuItem openItem,saveItem,closeItem;         private FileDialog openDia,saveDia;         private File file;    MyMenuTest()    {        init();    }         public void init()    {        f = new Frame("my window");        f.setBounds(300,100,650,600);        // f.setLayout(new FlowLayout());                 bar = new MenuBar();                 ta = new TextArea();                 fileMenu = new Menu("文件");                         openItem = new MenuItem("打开");        saveItem = new MenuItem("保存");        closeItem = new MenuItem("退出");                 fileMenu.add(openItem);        fileMenu.add(saveItem);        fileMenu.add(closeItem);        bar.add(fileMenu);                 f.setMenuBar(bar);                 openDia = new FileDialog(f,"我要打开",FileDialog.LOAD);        saveDia = new FileDialog(f,"我要保存",FileDialog.SAVE);                 f.add(ta);        myEvent();                 f.setVisible(true);    }         private void myEvent()    {        saveItem.addActionListener(new ActionListener()        {            public void actionPerformed(ActionEvent e)            {                if(file==null)                {                    saveDia.setVisible(true);                    String dirPath = saveDia.getDirectory();                    String fileName = saveDia.getFile();                    if(dirPath==null || fileName==null)                        return;                    file = new File(dirPath,fileName);                }                                 try                {                    BufferedWriter bufw = new BufferedWriter(new FileWriter(file));                                         String text = ta.getText();                                         bufw.write(text);                    // bufw.flush();                    bufw.close();                }                catch(IOException ex)                {                    throw new RuntimeException("错误");                }            }        });        openItem.addActionListener(new ActionListener()        {            public void actionPerformed(ActionEvent e)            {                openDia.setVisible(true);                String dirPath = openDia.getDirectory();                String fileName = openDia.getFile();                // System.out.println(dirPath+"..."+fileName);                if(dirPath==null || fileName==null)                    return;                ta.setText("");                file = new File(dirPath,fileName);                                 try                {                    BufferedReader bufr = new BufferedReader(new FileReader(file));                                         String line = null;                                         while((line=bufr.readLine())!=null)                    {                        ta.append(line+"\r\n");                    }                    bufr.close();                }                catch(IOException ex)                {                    throw new RuntimeException("读取失败");                }            }        });                 closeItem.addActionListener(new ActionListener()        {            public void actionPerformed(ActionEvent e)            {                System.exit(0);            }        });        f.addWindowListener(new WindowAdapter()        {            public void windowClosing(WindowEvent e)            {                System.exit(0);            }        });    }    public static void main(String[] args)    {        new MyMenuTest();    }}
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