JAVA 编的记事本

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.SECOND); File saveFileName = null, fileName = null; public Notepad4() { super("VXBB的记事本"); setDefaultCloseOperation(DO_NOTHING_ON_CLOSE); Container container = getContentPane(); // System.out.println(Text.getDragEnabled()); //支持自动拖放 JScrollPane scroll = new JScrollPane(Text); scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); Text.setWrapStyleWord(true); // 设置单词在一行不足容纳时换行 Text.setLineWrap(true); Text.setFont(defaultFont); // 设置编辑区默认字体 Text.setBackground(Color.white); // 设置编辑区默认背景色 Text.setForeground(Color.black); // 设置编辑区默认前景色 oldValue = Text.getText(); // 获取原文本编辑区的内容 // --------------------------编辑区注册事件监听 Text.getDocument().addUndoableEditListener(undoHandler); // 添加负责通知任何更改的撤消侦听器 Text.getDocument().addDocumentListener(this); // 添加负责通知任何更改的文档侦听器 JMenuBar MenuBar = new JMenuBar(); mFile = new JMenu("文件(F)", true); // 创建菜单 mEdit = new JMenu("编辑(E)", true); mMode = new JMenu("格式(O)", true); mView = new JMenu("查看(V)", true); mHelp = new JMenu("帮助(H)", true); mEdit.addActionListener(new ActionListener() // 注册事件监听 { public void actionPerformed(ActionEvent e) { checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性 } }); mFile.setMnemonic('F'); mEdit.setMnemonic('E'); mMode.setMnemonic('O'); mView.setMnemonic('V'); mHelp.setMnemonic('H'); MenuBar.add(mFile); MenuBar.add(mEdit); MenuBar.add(mMode); MenuBar.add(mView); MenuBar.add(mHelp); // --------------文件菜单 mFile_New = new JMenuItem("新建(N)", 'N'); mFile_Open = new JMenuItem("打开(O)", 'O'); mFile_Save = new JMenuItem("保存(S)", 'S'); mFile_ASave = new JMenuItem("另存为(A)", 'A'); mFile_Print = new JMenuItem("打印(P)", 'P'); mFile_Exit = new JMenuItem("退出(X)", 'X'); mFile_New.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK)); mFile_Open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK)); mFile_Save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK)); mFile_Print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK)); mFile_New.addActionListener(this); // 注册事件监听 mFile_Open.addActionListener(this); mFile_Save.addActionListener(this); mFile_ASave.addActionListener(this); mFile_Print.addActionListener(this); mFile_Exit.addActionListener(this); mFile.add(mFile_New); // 添加菜单项 mFile.add(mFile_Open); mFile.add(mFile_Save); mFile.add(mFile_ASave); mFile.addSeparator(); // 添加分割线 mFile.add(mFile_Print); mFile.addSeparator(); // 添加分割线 mFile.add(mFile_Exit); // --------------编辑菜单 mEdit_Undo = new JMenuItem("撤消(U)", 'U'); mEdit_Cut = new JMenuItem("剪切(T)", 'T'); mEdit_Copy = new JMenuItem("复制(C)", 'C'); mEdit_Paste = new JMenuItem("粘贴(P)", 'P'); mEdit_Del = new JMenuItem("删除(L)", 'L'); mEdit_Search = new JMenuItem("查找(F)", 'F'); mEdit_SearchNext = new JMenuItem("查找下一个(N)", 'N'); mEdit_Replace = new JMenuItem("替换(R)", 'R'); mEdit_Turnto = new JMenuItem("转到(G)", 'G'); mEdit_SelectAll = new JMenuItem("全选(A)", 'A'); mEdit_TimeDate = new JMenuItem("时间/日期(D)", 'D'); mEdit_Cut.setEnabled(false); mEdit_Undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK)); mEdit_Cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL_MASK)); mEdit_Copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK)); mEdit_Paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK)); mEdit_Del.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0)); mEdit_Search.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, InputEvent.CTRL_MASK)); mEdit_SearchNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3, 0)); mEdit_Replace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK)); mEdit_Turnto.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G, InputEvent.CTRL_MASK)); mEdit_SelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK)); mEdit_TimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5, 0)); mEdit_Undo.addActionListener(this); // 注册事件监听 mEdit_Cut.addActionListener(this); mEdit_Copy.addActionListener(this); mEdit_Paste.addActionListener(this); mEdit_Del.addActionListener(this); mEdit_Search.addActionListener(this); mEdit_SearchNext.addActionListener(this); mEdit_Replace.addActionListener(this); mEdit_Turnto.addActionListener(this); mEdit_SelectAll.addActionListener(this); mEdit_TimeDate.addActionListener(this); mEdit.add(mEdit_Undo); // 添加菜单项 mEdit.addSeparator(); // 添加分割线 mEdit.add(mEdit_Cut); mEdit.add(mEdit_Copy); mEdit.add(mEdit_Paste); mEdit.add(mEdit_Del); mEdit.addSeparator(); mEdit.add(mEdit_Search); mEdit.add(mEdit_SearchNext); mEdit.add(mEdit_Replace); mEdit.add(mEdit_Turnto); mEdit.addSeparator(); mEdit.add(mEdit_SelectAll); mEdit.add(mEdit_TimeDate); // --------------格式菜单 formatMenu_LineWrap = new JCheckBoxMenuItem("自动换行(W)"); formatMenu_LineWrap.setMnemonic('W'); formatMenu_LineWrap.setState(true); formatMenu_Font = new JMenuItem("字体(F)", 'F'); formatMenu_Color = n