网上搜的Java记事本程序源代码.doc

import java.awt.*; import java.awt.event.*; import java.text.*; import java.util.*; import java.io.*; import javax.swing.undo.*; import javax.swing.*; import javax.swing.event.*; import java.awt.datatransfer.*; import java.util.List; public class Notepad4 extends JFrame implements ActionListener, DocumentListener { JMenu mFile, mEdit, mMode, mView, mHelp; // 文件菜单 JMenuItem mFile_New, mFile_Open, mFile_Save, mFile_ASave, mFile_Print, mFile_Exit; // 编辑菜单 JMenuItem mEdit_Undo, mEdit_Cut, mEdit_Copy, mEdit_Paste, mEdit_Del, mEdit_Search, mEdit_SearchNext, mEdit_Replace, mEdit_Turnto, mEdit_SelectAll, mEdit_TimeDate; // 格式菜单 JCheckBoxMenuItem formatMenu_LineWrap; JMenu formatMenu_Color; JMenuItem formatMenu_Font, formatMenu_Color_FgColor, formatMenu_Color_BgColor; // 查看菜单 JCheckBoxMenuItem viewMenu_Status; // 帮助菜单 JMenuItem mHelp_HelpTopics, mHelp_About; // 弹出菜单级菜单项 JPopupMenu popupMenu; JMenuItem popupMenu_Undo, popupMenu_Cut, popupMenu_Copy, popupMenu_Paste, popupMenu_Delete, popupMenu_SelectAll; // 工具栏按钮 JButton newButton, openButton, saveButton, saveAsButton, printButton, undoButton, redoButton, cutButton, copyButton, pasteButton, deleteButton, searchButton, timeButton, fontButton, boldButton, italicButton, fgcolorButton, bgcolorButton, helpButton; // 文本编辑区域 static JTextArea Text; // 状态栏标签 JLabel statusLabel1, statusLabel2, statusLabel3; JToolBar statusBar; // 系统剪贴板 Toolkit toolKit = Toolkit.getDefaultToolkit(); Clipboard clipBoard = toolKit.getSystemClipboard(); // 创建撤消操作管理器 protected UndoManager undo = new UndoManager(); protected UndoableEditListener undoHandler = new UndoHandler(); // 其它变量 boolean isNewFile = true; // 是否新文件(未保存过的) File currentFile; // 当前文件名 String oldValue; // 存放编辑区原来的内容，用于比较文本是否有改动 JButton fontOkButton; // 字体设置里的确定按钮 // 设置编辑区默认字体 protected Font defaultFont = new Font(宋体, Font.PLAIN, 12); GregorianCalendar time = new GregorianCalendar(); int hour = time.get(Calendar.HOUR_OF_DAY); int min = time.get(Calendar.MINUTE); int second = time.get(Calendar