Simple Notepad program Java source project

The code is as follows

Import java.awt.*;import java.io.*;import java.awt.datatransfer.*;import java.awt.event.*;p ublic class Main extends Frame implements ActionListener {private static final long serialversionuid = 1L;   TextArea TextArea = new TextArea ();   MenuBar MenuBar = new MenuBar ();   Menu Filemenu = new Menu ("File");   MenuItem newitem = new MenuItem ("new");   MenuItem OpenItem = new MenuItem ("Open");   MenuItem SaveItem = new MenuItem ("Save");   MenuItem Saveasitem = new MenuItem ("Save as");   MenuItem Exititem = new MenuItem ("Exit");   Menu Editmenu = new Menu ("Edit");   MenuItem SelectItem = new MenuItem ("Select All");   MenuItem CopyItem = new MenuItem ("Copy");   MenuItem Cutitem = new MenuItem ("Cut");   MenuItem Pasteitem = new MenuItem ("Paste");   String fileName = null;   Toolkit Toolkit=toolkit.getdefaulttoolkit ();       Clipboard Clipboard=toolkit.getsystemclipboard ();    Private FileDialog OpenFileDialog = new FileDialog (this, "Open File", filedialog.load); Private FileDialog SaveAsFileDialog = new FileDialog (this, "Save File as", Filedialog.save);    Public Main () {settitle ("notepad program-by jackbase");    SetFont (New Font ("Times New Roman", font.plain,12));    SetBackground (Color.White);    SetSize (400,300);    Filemenu.add (NewItem);    Filemenu.add (OpenItem);    Filemenu.addseparator ();    Filemenu.add (SaveItem);    Filemenu.add (Saveasitem);    Filemenu.addseparator ();    Filemenu.add (Exititem);    Editmenu.add (SelectItem);    Editmenu.addseparator ();    Editmenu.add (CopyItem);    Editmenu.add (Cutitem);    Editmenu.add (Pasteitem);    Menubar.add (Filemenu);    Menubar.add (Editmenu);    Setmenubar (MenuBar);    Add (TextArea);                          Addwindowlistener (New Windowadapter () {public void windowclosing (WindowEvent e) {                        System.exit (0);    }                      });    Newitem.addactionlistener (this);    Openitem.addactionlistener (this);    Saveitem.addactionlistener (this);    Saveasitem.addactionlistener (this); ExitiTem.addactionlistener (this);    Selectitem.addactionlistener (this);    Copyitem.addactionlistener (this);    Cutitem.addactionlistener (this);  Pasteitem.addactionlistener (this);    } public void actionperformed (ActionEvent e) {//listener event Object EventSource = E.getsource ();    if (EventSource = = NewItem) {textarea.settext ("");      }else if (EventSource = = OpenItem) {openfiledialog.show ();      FileName = Openfiledialog.getdirectory () +openfiledialog.getfile ();    if (filename = null) readFile (filename);    }else if (EventSource = = SaveItem) {if (filename! = null) WriteFile (filename);      }else if (EventSource = = Saveasitem) {saveasfiledialog.show ();      FileName = Saveasfiledialog.getdirectory () +saveasfiledialog.getfile ();    if (filename!= null) WriteFile (fileName);    }else if (EventSource = = SelectItem) {textarea.selectall ();       }else if (EventSource = = CopyItem) {String text=textarea.getselectedtext (); StringSelection selection=new stringselection (text);    Clipboard.setcontents (Selection,null);       }else if (EventSource = = Cutitem) {String text=textarea.getselectedtext ();       StringSelection selection=new stringselection (text);       Clipboard.setcontents (Selection,null);    Textarea.replacerange ("", Textarea.getselectionstart (), Textarea.getselectionend ());       }else if (EventSource = = Pasteitem) {transferable contents=clipboard.getcontents (this);       if (contents==null) return;       String text;       Text= "";        try{text= (String) contents.gettransferdata (Dataflavor.stringflavor); }catch (Exception Exception) {} textarea.replacerange (Text,textarea.getselectionstart (), Textarea.getselectione    nd ());    }else if (EventSource = = Exititem) {system.exit (0);      }} public void ReadFile (String fileName) {//reads the file processing try{the files file = new file (fileName);      FileReader Readin = new FileReader (file);      int size = (int) file.length (); int charsread = 0;      char[] content = new Char[size];      while (Readin.ready ()) Charsread + = readin.read (content, Charsread, size-charsread);      Readin.close ();    Textarea.settext (New String (content, 0, charsread));    } catch (IOException e) {System.out.println ("Error opening file");      }} public void WriteFile (String fileName) {///writes to file processing try{files file = new file (fileName);      FileWriter writeout = new FileWriter (file);      Writeout.write (Textarea.gettext ());    Writeout.close ();    } catch (IOException e) {System.out.println ("Error writing file"); }} @SuppressWarnings ("deprecation") public static void main (string[] args) {frame frame = new Main ();   Built object Frame.show (); is Object display}}

Run results
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Detailed Description: http://java.662p.com/thread-2217-1-2.html

Simple Notepad program Java source project