java记事本源代码

<span style="font-size:24px;">import java.awt.CheckboxMenuItem;import java.awt.Color;import java.awt.Container;import java.awt.FileDialog;import java.awt.FlowLayout;import java.awt.Font;import java.awt.GraphicsEnvironment;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.MenuShortcut;import java.awt.TextArea;import java.awt.Toolkit;import java.awt.Window;import java.awt.datatransfer.Clipboard;import java.awt.datatransfer.DataFlavor;import java.awt.datatransfer.StringSelection;import java.awt.datatransfer.Transferable;import java.awt.datatransfer.UnsupportedFlavorException;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyEvent;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.util.logging.Level;import java.util.logging.Logger;import javax.swing.JButton;import javax.swing.JColorChooser;import javax.swing.JComboBox;import javax.swing.JDialog;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;public class notebook {   // 记事本的具体实现类   private static final long serialVersionUID = 1L;   private  TextArea content;    private  String filePath = "";//先让路径为空   Color color=Color.red;   Toolkit toolKit = Toolkit.getDefaultToolkit();   Clipboard clipboard = toolKit.getSystemClipboard();   public notebook(){   //创建一个JFrame对象；并设置相关属性   final JFrame jf = new JFrame("我的记事本");   jf.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);   jf.setBounds(100,100,500,500);   jf.setResizable(true);   jf.setVisible(true);   //创建菜单栏   MenuBar menu = new MenuBar();   jf.setMenuBar(menu);   //创建并添加文本框   content = new TextArea("",50,50,TextArea.SCROLLBARS_VERTICAL_ONLY);   jf.add(content);   content.setVisible(true);   content.requestFocusInWindow();   //菜单栏添加内容   Menu filemenu = new Menu("文件（F）");   Menu editmenu = new Menu("编辑（E）");   Menu formatmenu = new Menu("格式（O）");   Menu viewmenu = new Menu("查看（V）");   Menu helpmenu = new Menu("帮助（H）");   menu.add(filemenu);   menu.add(editmenu);   menu.add(formatmenu);   menu.add(viewmenu);   menu.add(helpmenu);   //创建文件菜单上的各个菜单项并添加到菜单上   MenuItem newitem = new MenuItem("新建（N）");   newitem.setShortcut(new MenuShortcut(KeyEvent.VK_N,false));   filemenu.add(newitem);   MenuItem openitem = new MenuItem("打开（O）");   openitem.setShortcut(new MenuShortcut(KeyEvent.VK_O,false));   filemenu.add(openitem);   MenuItem saveitem = new MenuItem("保存（S）");   saveitem.setShortcut(new MenuShortcut(KeyEvent.VK_S,false));   filemenu.add(saveitem);   MenuItem saveasitem = new MenuItem("另存为（A）");   saveasitem.setShortcut(new MenuShortcut(KeyEvent.VK_A,false));   filemenu.add(saveasitem);   MenuItem setitem = new MenuItem("页面设置（U）");   setitem.setShortcut(new MenuShortcut(KeyEvent.VK_U,false));   filemenu.add(setitem);   setitem.setEnabled(false);   MenuItem printitem = new MenuItem("打印（P）");   printitem.setShortcut(new MenuShortcut(KeyEvent.VK_P,false));   filemenu.add(printitem);   printitem.setEnabled(false);   filemenu.addSeparator();   MenuItem exititem = new MenuItem("退出（X）");   exititem.setShortcut(new MenuShortcut(KeyEvent.VK_X,false));   filemenu.add(exititem);   //添加监听器来实现文件菜单上的各个菜单项的功能   //新建菜单项的功能实现   newitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {           String con = content.getText();           if(!con.equals("")){//文本域里文本不为空               int result = JOptionPane.showConfirmDialog(                       null, ("是否要保存？"),("保存文件..."),JOptionPane.YES_NO_CANCEL_OPTION);               if(result == JOptionPane.NO_OPTION){//不保存               content.setText("");               }                              else if(result == JOptionPane.CANCEL_OPTION){//取消新建               }                              else if(result == JOptionPane.YES_OPTION)//选择保存               {                   JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名                   int bcf = jfc.showSaveDialog(jf);                   if(bcf == JFileChooser.APPROVE_OPTION){                            try {                                //保存文件                                BufferedWriter bfw = new BufferedWriter(                                        new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt")));                                filePath = jfc.getSelectedFile().getAbsolutePath()+".txt";//获取文件保存的路径                                bfw.write(con);//向文件写出数据                                bfw.flush();                                bfw.close();//关闭输出流                            } catch (IOException ex) {                                Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex);                            }                       new notebook();//新建文本文件                   }               }           }       }      });   //打开菜单项的功能实现    openitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {//JFileChooser jfile = new JFileChooser();//FileNameExtensionFilter filter = new FileNameExtensionFilter("*.txt","txt");//jfile.setFileFilter(filter);//jfile.setVisible(true);//int returnval = jfile.showOpenDialog(jfile);//filePath = jfile.getDialogTitle()+jfile.getSelectedFile().getName();//System.out.println(jfile.getSelectedFile());FileDialog dialog = new FileDialog(new JFrame(),"打开....",FileDialog.LOAD);dialog.setVisible(true);filePath = dialog.getDirectory() + dialog.getFile();            System.out.println(filePath);File file = new File(filePath);BufferedReader br = null;StringBuilder sb = new StringBuilder();try{br = new BufferedReader (new FileReader(file));String str = null;while ((str = br.readLine()) != null){sb.append(str).append("\n");}content.setText(sb.toString());}catch(FileNotFoundException e1){e1.printStackTrace();}catch(IOException e1){e1.printStackTrace();}finally{if(br != null){try{br.close();}catch(IOException e1){e1.printStackTrace();}}}}      });   //保存菜单项的功能实现   saveitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {//FileDialog dialog = new FileDialog(new JFrame(),"保存....",FileDialog.SAVE);//dialog.setVisible(true);//filePath = dialog.getDirectory() + dialog.getFile();//File file = new File(filePath);//BufferedWriter bw = null;//try{//bw = new BufferedWriter(new FileWriter(file));//bw.write(content.getText());//}//catch(FileNotFoundException e1){//e1.printStackTrace();//}//catch(IOException e1){//e1.printStackTrace();//}//finally{//if(bw != null){//try{//bw.close();//}//catch(IOException e1){//e1.printStackTrace();//}//}//}FileDialog dialog = new FileDialog(new JFrame(),"保存....",FileDialog.SAVE);dialog.setVisible(true);filePath = dialog.getDirectory() + dialog.getFile();if(filePath.equals("")){//没有路径时，就另存为               JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名                   int bcf = jfc.showSaveDialog(jf);//弹出保存窗口                   if(bcf == JFileChooser.APPROVE_OPTION){                            try {                                //保存文件                                BufferedWriter bfw = new BufferedWriter(                                        new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt")));                                filePath = jfc.getSelectedFile().getAbsolutePath();                                bfw.write(content.getText());//向文件写出数据                                bfw.flush();                                bfw.close();//关闭输出流                            } catch (IOException ex) {                                Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex);                            }                   }           }           else{//路径不为空时，保存在原来的路径下               try {                   //保存文件                   BufferedWriter bfw = new BufferedWriter(                           new FileWriter(                           new File(filePath)));                   bfw.write(content.getText());//向文件写出数据                   bfw.flush();                   bfw.close();//关闭输出流               } catch (IOException ex) {                   Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex);               }           }}     });   //另存为菜单项的功能实现   saveasitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) { JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名                 int bcf = jfc.showSaveDialog(jf);//弹出保存窗口                 if(bcf == JFileChooser.APPROVE_OPTION){                          try {                              //保存文件                              BufferedWriter bfw = new BufferedWriter(                                      new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt")));                              filePath = jfc.getSelectedFile().getAbsolutePath();                              bfw.write(content.getText());//向文件写出数据                              bfw.flush();                              bfw.close();//关闭输出流                          } catch (IOException ex) {                              Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex);                          }                 }}      });   //页面设置菜单项的功能实现   setitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      });   //打印菜单项的功能实现   printitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      });   //退出菜单项的功能实现   exititem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {Object[] options = { "是的，我要退出", "不好意思，点错了" };int option = JOptionPane.showOptionDialog(null, "您确定要退出吗？", "退出提示....",JOptionPane.OK_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE,  null,options, options[0]);      if(option == JOptionPane.OK_OPTION){ System.exit(0); }}      }); //创建编辑菜单上的各个菜单项并添加到菜单上   MenuItem undoitem = new MenuItem("撤销（U）");   undoitem.setShortcut(new MenuShortcut(KeyEvent.VK_Z,false));   editmenu.add(undoitem);     MenuItem cutitem = new MenuItem("剪切（T）");   cutitem.setShortcut(new MenuShortcut(KeyEvent.VK_X,false));   editmenu.add(cutitem);     MenuItem copyitem = new MenuItem("复制（C）");   copyitem.setShortcut(new MenuShortcut(KeyEvent.VK_C,false));   editmenu.add(copyitem);     MenuItem pasteitem = new MenuItem("粘贴（P）");   pasteitem.setShortcut(new MenuShortcut(KeyEvent.VK_V,false));   editmenu.add(pasteitem);     MenuItem deleteitem = new MenuItem("删除（L）");   deleteitem.setShortcut(new MenuShortcut(KeyEvent.VK_DELETE,false));   editmenu.add(deleteitem);     editmenu.addSeparator();   MenuItem finditem = new MenuItem("查找（F）");   finditem.setShortcut(new MenuShortcut(KeyEvent.VK_F,false));   editmenu.add(finditem);     MenuItem nextitem = new MenuItem("查找下一个（N）");   nextitem.setShortcut(new MenuShortcut(KeyEvent.VK_3,false));   editmenu.add(nextitem);     MenuItem replaceitem = new MenuItem("替换（R）");   replaceitem.setShortcut(new MenuShortcut(KeyEvent.VK_H,false));   editmenu.add(replaceitem);     MenuItem turntoitem = new MenuItem("转到（G）");   turntoitem.setShortcut(new MenuShortcut(KeyEvent.VK_G,false));   editmenu.add(turntoitem);     editmenu.addSeparator();   //复选菜单项   Menu choicemenu = new Menu("选择(C)");   MenuItem allitem = new MenuItem("全选（A）");   allitem.setShortcut(new MenuShortcut(KeyEvent.VK_A,false));   choicemenu.add(allitem);   MenuItem fanxiangitem = new MenuItem("反向选择(B)");   fanxiangitem.setShortcut(new MenuShortcut(KeyEvent.VK_B,false));   choicemenu.add(fanxiangitem);   MenuItem chieseitem = new MenuItem("选择汉字（C）");   chieseitem.setShortcut(new MenuShortcut(KeyEvent.VK_C,false));   choicemenu.add(chieseitem);   editmenu.add(choicemenu);     //编辑菜单项的时间/日期项   MenuItem dateitem = new MenuItem("时间/日期（D）");   dateitem.setShortcut(new MenuShortcut(KeyEvent.VK_5,false));   editmenu.add(dateitem);      //添加监听器来实现编辑菜单上的各个菜单项的功能  //撤销菜单项的功能实现   undoitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      }); //剪切菜单项的功能实现   cutitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {String text = content.getSelectedText();StringSelection selection = new StringSelection(text);clipboard.setContents(selection, null);if(text.length() == 0){return;}else{content.replaceRange("", content.getSelectionStart(),content.getSelectionEnd());}}      }); //复制菜单项的功能实现   copyitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {String text = content.getSelectedText();StringSelection selection = new StringSelection(text);clipboard.setContents(selection, null);}      }); //粘贴菜单项的功能实现   pasteitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {Transferable contents = clipboard.getContents(this);String str =null;try {str = (String) contents.getTransferData(DataFlavor.stringFlavor);} catch (UnsupportedFlavorException e1) {e1.printStackTrace();} catch (IOException e1) {e1.printStackTrace();}if (str == null)return;try {content.replaceRange(str,content.getSelectionStart(),content.getSelectionEnd());} catch (Exception e1) {e1.printStackTrace();}}      }); //删除菜单项的功能实现   deleteitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {content.replaceRange("",content.getSelectionStart(),content.getSelectionEnd());}      }); //查找菜单项的功能实现   finditem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {final JDialog dialog = new JDialog(jf,"查找字符串...",true);dialog.setBounds(560,250,310,130);JLabel find = new JLabel("请输入字符串 :");final JTextField findtext = new JTextField(1);JButton jbu = new JButton("查找");dialog.setLayout(null);find.setBounds(10,30,90,20);findtext.setBounds(100,30,90,20);jbu.setBounds(200,30,80,20);dialog.add(find);dialog.add(findtext);dialog.add(jbu);jbu.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {String text = content.getText();        String str = findtext.getText();        int end = text.length();        int len = str.length();        int start = content.getSelectionEnd();        if(start == end){        start = 0;        }        for(;start<=end-len;start++){            if(text.substring(start,start+len).equals(str)){            content.setSelectionStart(start);            content.setSelectionEnd(start+len);                return;            }        }        //若找不到待查字符串，则将光标置于末尾         content.setSelectionStart(end);        content.setSelectionEnd(end);    }      });        dialog.addWindowListener(new WindowAdapter(){            public void windowClosing(WindowEvent e){                dialog.dispose();            }        });        dialog.setResizable(false);dialog.setVisible(true);}      }); //查找下一个菜单项的功能实现   nextitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      }); //替换菜单项的功能实现   replaceitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {  final JDialog dialog = new JDialog(jf,"字符串替换...",true);  dialog.setBounds(560,250,310,180);  final JLabel tihuan = new JLabel("请输入要替换的字符串 ：");  JLabel mubiao = new JLabel("请输入替换后的字符串 ：");  JTextField jtf1 = new JTextField(10);  JTextField jtf2 = new JTextField(10);  JButton jb = new JButton("替换");  dialog.setLayout(null);          tihuan.setBounds(10,30,150,20);          mubiao.setBounds(10,70,150,20);          jtf1.setBounds(160,30,110,20);          jtf2.setBounds(160,70,110,20);          jb.setBounds(100,110,80,20);          dialog.add(tihuan);          dialog.add(mubiao);          dialog.add(jtf1);          dialog.add(jtf2);          dialog.add(jb);          final String text = content.getText();          final String str1 = tihuan.getText();  final String str2 = mubiao.getText();  jb.addActionListener(new ActionListener(){  public void actionPerformed(ActionEvent e) {            if(content.getSelectedText().equals(tihuan.getText())){               content.replaceRange(str2,content.getSelectionStart(),content.getSelectionEnd());                 }            else {                 int end=text.length();                 int len=str1.length();                 int start=content.getSelectionEnd();                 if(start==end) start=0;                 for(;start<=end-len;start++){                     if(text.substring(start,start+len).equals(str1)){                     content.setSelectionStart(start);                     content.setSelectionEnd(start+len);                         return;                     }                  }                  //若找不到待查字符串，则将光标置于末尾                  content.setSelectionStart(end);                  content.setSelectionEnd(end);                 }                       }           });  dialog.setResizable(false);              dialog.setVisible(true);}      }); //转到菜单项的功能实现   turntoitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      }); //全选菜单项的功能实现   allitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {content.selectAll();}      }); //反向选择菜单项的功能实现   fanxiangitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      }); //选择汉字菜单项的功能实现   chieseitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      });   //时间菜单项的功能实现   dateitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      }); //创建格式菜单上的各个菜单项并添加到菜单上     CheckboxMenuItem lineturnitem = new CheckboxMenuItem("自动换行（W）");   formatmenu.add(lineturnitem);   formatmenu.addSeparator();   MenuItem worditem = new MenuItem("字体（F）");   formatmenu.add(worditem);   worditem.setEnabled(true);   formatmenu.addSeparator();   MenuItem coloritem = new MenuItem("字体颜色（C）");   formatmenu.add(coloritem);    //添加监听器来实现格式菜单上的各个菜单项的功能//自动换行菜单项的功能实现   lineturnitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}      });//字体菜单项的功能实现   worditem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) { final JFrame ztsz = new JFrame("字体设置...");//字体设置窗口           //字体           ztsz.setLocation(150, 200);           jf.setEnabled(false);//文本编辑窗体不可用！           final JComboBox jc = new JComboBox(                   GraphicsEnvironment.getLocalGraphicsEnvironment()                   .getAvailableFontFamilyNames());           jc.setLocation(30, 80);           Container c = ztsz.getContentPane();           JPanel jp = new JPanel();           jp.add(jc,new FlowLayout());           //字形           String[]   faceString={"正常","粗体","斜体","粗斜体"};           String[]   sizeString={"初号","小初","一号","小一","二号","小二",                  "三号","小三","四号","小四","五号","小五","六号","小六","七号",                  "八号","5","8","9","10","11","12","14","16","18","20","22","24",                  "26","28","36","48","72"};           final JComboBox zx = new JComboBox(faceString);           final JComboBox dx = new JComboBox(sizeString);           final JButton sure = new JButton("确定");           final JButton cancel = new JButton("取消");                      jp.add(zx);           jp.add(dx);           jp.add(sure);           jp.add(cancel);           c.add(jp);           //确定           sure.addActionListener(new ActionListener(){               public void actionPerformed(ActionEvent e){//将文本设置成所选的字体                       if(!content.getText().equals("")){                       content.setFont(new Font(                               jc.getActionCommand(),zx.getSelectedIndex(),                               dx.getSelectedIndex()));                           jf.setEnabled(true);//文本编辑窗体可用                           ztsz.dispose();                       }                       else{                           JOptionPane.showMessageDialog(null,                                   "您的文本中还没有内容，请输入内容后重新设置！"                                    ,"消息...",JOptionPane.INFORMATION_MESSAGE);                           jf.setEnabled(true);                           ztsz.dispose();                       }            }           });           cancel.addActionListener(new ActionListener(){//取消               public void actionPerformed(ActionEvent e){                       jf.setEnabled(true);//文本编辑窗体可用                       ztsz.dispose();//关闭字体设置窗体               }           });           ztsz.setSize(360, 100);//设置窗体长度100和宽度360           ztsz.setVisible(true);//窗体可见           ztsz.setResizable(false);//禁止放大窗体}  }); //字体颜色菜单项的功能实现   coloritem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {color=JColorChooser.showDialog(jf,"",color);                content.setForeground(color);}      });       //添加监听器来实现查看菜单上的各个菜单项的功能//字数统计菜单项的功能实现  MenuItem countitem = new MenuItem("字数统计（C）");  viewmenu.add(countitem);countitem.setEnabled(true);countitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}});//状态栏菜单项的功能实现  MenuItem stateitem = new MenuItem("状态栏（S）");  viewmenu.add(stateitem);stateitem.setEnabled(false);stateitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {}});//创建帮助菜单上的各个菜单项并添加到菜单上MenuItem findhelpitem = new MenuItem("查看帮助（H）");  helpmenu.add(findhelpitem);findhelpitem.setEnabled(false);helpmenu.addSeparator();MenuItem aboutboxitem = new MenuItem("关于记事本（A）");  helpmenu.add(aboutboxitem);helpmenu.addSeparator();MenuItem writeritem = new MenuItem("关于作者（S）");  helpmenu.add(writeritem);//添加监听器来实现帮助菜单上的各个菜单项的功能//查看帮助菜单项的功能实现 findhelpitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){}});//关于记事本菜单项的功能实现  aboutboxitem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){JOptionPane.showMessageDialog(jf,"本软件由孤独的野狼制作！\n如需要源代码，随时欢迎联系作者！\n" +"作者邮箱：[e-mail]\nQQ号：2442701497\n本程序基本上实现了Microsoft记事本的功能\n" +"并新增了“反向选择”，“选择汉字”\n" +"“字数统计”,“自动保存”等功能  ...\n希望您喜欢！\n" +"如有任何疑问及改善意见，随时欢迎指出，\n我们将尽最大的努力满足您的需求！\n" +"最后谢谢您的使用！\n版权所有，请勿侵权！","关于记事本...",JOptionPane.INFORMATION_MESSAGE);}});//关于作者菜单项的功能实现  writeritem.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){JOptionPane.showMessageDialog(jf,"作者：孤独的野狼\n性别：男\n籍贯：湖南邵阳\n出生日：1990年11月9日\n" +"本科院校：上海应用技术学院\n现居地：上海\n自我介绍：不帅也不丑\n偶像：爱因斯坦\n" +"最喜欢的歌手：刀郎\n最向往的地方：北京\n座右铭：疯狂源自梦想\n" +"                 勤奋铸就辉煌\n最喜欢的话：我愿变成一座石桥，受五百年风吹，五百年雨打，\n" +"                          五百年日晒，只求你从上面走过...\n" +"梦想：天地有多大，梦有多潇洒\n","关于作者...",JOptionPane.INFORMATION_MESSAGE);}});    //关闭程序事件     jf.addWindowListener(new WindowAdapter(){     //程序关闭时的方法     public void windowClosing(WindowEvent e){     int option = JOptionPane.showConfirmDialog(null, "您确定关闭吗？", "关闭提示....",JOptionPane.OK_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE); if(option == JOptionPane.OK_OPTION){ ((Window) e.getComponent()).dispose(); System.exit(0); }   }        });     }   public static void main(String[] args){   new notebook();   }}//新构想：//记事本程序添加音乐盒功能，音乐在后台播放//程序并不实际保存音乐文件，只保存音乐文件的地址//为程序保留20M空间或20M的数据库用于音乐播放//为本程序添加自动保存功能，每一分钟保存一次，后台保存//可能要用到多线程//如果用户选择的保存地址与默认的地址不同，则删除默认地址保存的文件//并且在本次操作中一直使用用户选择的保存地址//但在下次操作时仍使用本程序默认的地址//告诉用户默认的地址，让用户能找到程序为用户保存的文件//最好在“关于记事本”的文档中插入相应的超链接，方便用户//这样做能让用户在出现死机和突然断电时劳动成果不至于付诸东流</span>