/**
?*?
?*/
package?NotePad;

import?java.awt.*;??
import?java.awt.event.*;??
import?java.text.*;??
import?java.util.*;??
import?java.io.*;??
import?javax.swing.undo.*;??
import?javax.swing.border.*;??
import?javax.swing.*;??
import?javax.swing.text.*;??
import?javax.swing.event.*;??
import?java.awt.datatransfer.*;??
/**
?*?@author?Gene
?*
?*/
?
public?class?Notepad?extends?Jframe?implements?ActionListenerDocumentListener??
{???//菜單??
???JMenu?fileMenueditMenuformatMenuviewMenuhelpMenu;??
???//右鍵彈出菜單項??
???JPopupMenu?popupMenu;??
???JMenuItem?popupMenu_UndopopupMenu_CutpopupMenu_CopypopupMenu_PastepopupMenu_DeletepopupMenu_SelectAll;??
???//“文件”的菜單項??
???JMenuItem?fileMenu_NewfileMenu_OpenfileMenu_SavefileMenu_SaveAsfileMenu_PageSetUpfileMenu_PrintfileMenu_Exit;??
???//“編輯”的菜單項??
???JMenuItem?editMenu_UndoeditMenu_CuteditMenu_CopyeditMenu_PasteeditMenu_DeleteeditMenu_FindeditMenu_FindNexteditMenu_ReplaceeditMenu_GoToeditMenu_SelectAlleditMenu_TimeDate;??
???//“格式”的菜單項??
???JCheckBoxMenuItem?formatMenu_LineWrap;??
???JMenuItem?formatMenu_Font;??
???//“查看”的菜單項??
???JCheckBoxMenuItem?viewMenu_Status;??
???//“幫助”的菜單項??
???JMenuItem?helpMenu_HelpTopicshelpMenu_AboutNotepad;??
???//“文本”編輯區域??
???JTextArea?editArea;??
???//狀態欄標簽??
???JLabel?statusLabel;??
???//系統剪貼板??
???Toolkit?toolkit=Toolkit.getDefaultToolkit（）;??
???Clipboard?clipBoard=toolkit.getSystemClipboard（）;??
???//撤銷操作
???protected?UndoManager?undo=new?UndoManager（）;??
???protected?UndoableEditListener?undoHandler=new?UndoHandler（）;??
???//其他變量??
???String?oldValue;//存放編輯區原來的內容，用于比較文本是否有改動??
???boolean?isNewFile=true;//是否新文件（未保存過的）??
???File?currentFile;//當前文件名??
???//構造函數開始??
???public?Notepad（）??
???{?????
???????super（“Java記事本“）;??
???????//改變系統默認字體??
???????Font?font?=?new?Font（“Dialog“?Font.PLAIN?12）;??
???????java.util.Enumeration?keys?=?UIManager.getDefaults（）.keys（）;??
???????while?（keys.hasMoreElements（））?{??
???????????object?key?=?keys.nextElement（）;??
???????????object?value?=?UIManager.get（key）;??
???????????if?（value?instanceof?javax.swing.plaf.FontUIResource）?{??
???????????????UIManager.put（key?font）;??
???????????}??
???????}??
???????//創建菜單條??
???????JMenuBar?menuBar=new?JMenuBar（）;??
???????//創建文件菜單及菜單項并注冊事件監聽??
???????fileMenu=new?JMenu（“文件（F）“）;??
???????fileMenu.setMnemonic（‘F‘）;//設置快捷鍵ALT+F??
?
???????fileMenu_New=new?JMenuItem（“新建（N）“）;??
???????fileMenu_New.setAccelerator（KeyStroke.getKeyStroke（KeyEvent.VK_NInputEvent.CTRL_MASK））;??
???????fileMenu_New.addActionListener（this）;??
?
???????fileMenu_Open=new?JMenuItem（“打開（O）...“）;??
???????fileMenu_Open.setAccelerator（KeyStroke.getKeyStroke（KeyEvent.VK_OInputEvent.CTRL_MASK））;??
???????fileMenu_Open.addActionListener（this）;??
?
???????fileMenu_Save=new?JMenuItem（“保存（S）“）;??
???????fileMenu_Save.setAccelerator（KeyStroke.getKeyStroke（KeyEvent.VK_SInputEvent.CTRL_MASK））;??
???????fileMenu_Save.addActionListene