JAVA记事本源代码收藏

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原创最新推荐文章于 2026-07-12 22:36:52 发布 1w 阅读 AI 写同款· GEO 优化 ›

java记事本源代码 本文仿电脑自带记事本，实现的功能有新建、新窗口、打开、保存、另存为、退出、撤销、剪切、复制、粘贴、删除、查找、查找下一个、查找上一个、替换、转到、全选、时间/日期、自动换行、缩放（放大、缩小、恢复默认大小），未实现功能有页面设置、打印、字体、状态栏、帮助。仅供学习、参考，不要照搬，搬了弄懂也行，如有问题可以评论提出。阅读详情

JAVA记事本源代码 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 回复举报飘过 0砸 0顶 0 2楼軒轅^-^葬愛发表于 2008.11.23 13:28:42 ew JMenu("颜色"); formatMenu_Color_FgColor = new JMenuItem("字体颜色"); formatMenu_Color_BgColor = new JMenuItem("背景颜色"); formatMenu_LineWrap.addActionListener(this); // 注册事件监听 formatMenu_Font.addActionListener(this); formatMenu_Color_FgColor.addActionListener(this); formatMenu_Color_BgColor.addActionListener(this); mMode.add(formatMenu_LineWrap); // 添加菜单项 mMode.addSeparator(); mMode.add(formatMenu_Font); mMode.add(formatMenu_Color); formatMenu_Color.add(formatMenu_Color_FgColor); formatMenu_Color.add(formatMenu_Color_BgColor); // --------------查看菜单 viewMenu_Status = new JCheckBoxMenuItem("状态栏(S)"); viewMenu_Status.setMnemonic('S'); viewMenu_Status.setState(true); viewMenu_Status.addActionListener(this); mView.add(viewMenu_Status); // --------------帮助菜单 mHelp_HelpTopics = new JMenuItem("帮助(H)", 'H'); mHelp_About = new JMenuItem("关于(A)", 'A'); mHelp_HelpTopics.addActionListener(this); mHelp_About.addActionListener(this); mHelp.add(mHelp_HelpTopics); mHelp.addSeparator(); // 添加分割线 mHelp.add(mHelp_About); // -------------------创建右键弹出菜单 popupMenu = new JPopupMenu(); popupMenu_Undo = new JMenuItem("撤消(U)", 'U'); popupMenu_Cut = new JMenuItem("剪切(T)", 'T'); popupMenu_Copy = new JMenuItem("复制(C)", 'C'); popupMenu_Paste = new JMenuItem("粘贴(P)", 'P'); popupMenu_Delete = new JMenuItem("删除(D)", 'D'); popupMenu_SelectAll = new JMenuItem("全选(A)", 'A'); popupMenu_Undo.setEnabled(false); // 撤消选项初始设为不可用 // ---------------向右键菜单添加菜单项和分隔符 popupMenu.add(popupMenu_Undo); popupMenu.addSeparator(); popupMenu.add(popupMenu_Cut); popupMenu.add(popupMenu_Copy); popupMenu.add(popupMenu_Paste); popupMenu.add(popupMenu_Delete); popupMenu.addSeparator(); popupMenu.add(popupMenu_SelectAll); // --------------------右键菜单注册事件 popupMenu_Undo.addActionListener(this); popupMenu_Cut.addActionListener(this); popupMenu_Copy.addActionListener(this); popupMenu_Paste.addActionListener(this); popupMenu_Delete.addActionListener(this); popupMenu_SelectAll.addActionListener(this); // --------------------文本编辑区注册右键菜单事件 Text.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { checkForTriggerEvent(e); } public void mouseReleased(MouseEvent e) { checkForTriggerEvent(e); } private void checkForTriggerEvent(MouseEvent e) { if (e.isPopupTrigger()) popupMenu.show(e.getComponent(), e.getX(), e.getY());// 在组件调用者的坐标空间中的位置 // X、Y // 显示弹出菜单。 else { statusLabel3.setText("当前光标所在行数: " + getlineNumber()); } checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性 Text.requestFocus(); // 编辑区获取焦点 } }); // ----------------------------创建工具栏 JPanel toolBar = new JPanel(); toolBar.setLayout(new FlowLayout(FlowLayout.LEFT)); Icon newIcon = new ImageIcon("Icons/new.gif"); Icon openIcon = new ImageIcon("Icons/open.gif"); Icon saveIcon = new ImageIcon("Icons/save.gif"); Icon saveAsIcon = new ImageIcon("Icons/saveas.gif"); Icon printIcon = new ImageIcon("Icons/print.gif"); Icon undoIcon = new ImageIcon("Icons/undo.gif"); Icon cutIcon = new ImageIcon("Icons/cut.gif"); Icon copyIcon = new ImageIcon("Icons/copy.gif"); Icon pasteIcon = new ImageIcon("Icons/paste.gif"); Icon deleteIcon = new ImageIcon("Icons/delete.gif"); Icon searchIcon = new ImageIcon("Icons/search.gif"); Icon timeIcon = new ImageIcon("Icons/time.gif"); Icon fontIcon = new ImageIcon("Icons/font.gif"); Icon boldIcon = new ImageIcon("Icons/bold.gif"); Icon italicIcon = new ImageIcon("Icons/italic.gif"); Icon bgcolorIcon = new ImageIcon("Icons/bgcolor.gif"); Icon fgcolorIcon = new ImageIcon("Icons/fgcolor.gif"); Icon helpIcon = new ImageIcon("Icons/help.gif"); newButton = new JButton(newIcon); openButton = new JButton(openIcon); saveButton = new JButton(saveIcon); saveAsButton = new JButton(saveAsIcon); printButton = new JButton(printIcon); undoButton = new JButton(undoIcon); undoButton.setEnabled(false); cutButton = new JButton(cutIcon); cutButton.setEnabled(false); copyButton = new JButton(copyIcon); copyButton.setEnabled(false); pasteButton = new JButton(pasteIcon); pasteButton.setEnabled(false); deleteButton = new JButton(deleteIcon); deleteButton.setEnabled(false); searchButton = new JButton(searchIcon); timeButton = new JButton(timeIcon); fontButton = new JButton(fontIcon); boldButton = new JButton(boldIcon); italicButton = new JButton(italicIcon); fgcolorButton = new JButton(fgcolorIcon); bgcolorButton = new JButton(bgcolorIcon); helpButton = new JButton(helpIcon); newButton.setPreferredSize(new Dimension(22, 22)); openButton.setPreferredSize(new Dimension(22, 22)); saveButton.setPreferredSize(new Dimension(22, 22)); saveAsButton.setPreferredSize(new Dimension(22, 22)); printButton.setPreferredSize(new Dimension(22, 22)); undoButton.setPreferredSize(new Dimension(22, 22)); cutButton.setPreferredSize(new Dimension(22, 22)); copyButton.setPreferredSize(new Dimension(22, 22)); pasteButton.setPreferredSize(new Dimension(22, 22)); deleteButton.setPreferredSize(new Dimension(22, 22)); searchButton.setPreferredSize(new Dimension(22, 22)); timeButton.setPreferredSize(new Dimension(22, 22)); fontButton.setPreferredSize(new Dimension(22, 22)); boldButton.setPreferredSize(new Dimension(22, 22)); italicButton.setPreferredSize(new Dimension(22, 22)); fgcolorButton.setPreferredSize(new Dimension(22, 22)); bgcolorButton.setPreferredSize(new Dimension(22, 22)); helpButton.setPreferredSize(new Dimension(22, 22)); // -----------------------------------注册工具栏按钮事件 newButton.addActionListener(this); openButton.addActionListener(this); saveButton.addActionListener(this); saveAsButton.addActionListener(this); printButton.addActionListener(this); undoButton.addActionListener(this); cutButton.addActionListener(this); copyButton.addActionListener(this); pasteButton.addActionListener(this); deleteButton.addActionListener(this); searchButton.addActionListener(this); timeButton.addActionListener(this); fontButton.addActionListener(this); boldButton.addActionListener(this); italicButton.addActionListener(this); fgcolorButton.addActionListener(this); bgcolorButton.addActionListener(this); helpButton.addActionListener(this); // ------------------------设置按钮提示文字 newButton.setToolTipText("新建"); openButton.setToolTipText("打开"); saveButton.setToolTipText("保存"); saveAsButton.setToolTipText("另存为"); printButton.setToolTipText("打印"); undoButton.setToolTipText("撤消"); cutButton.setToolTipText("剪切"); copyButton.setToolTipText("复制"); pasteButton.setToolTipText("粘贴"); deleteButton.setToolTipText("删除所选"); searchButton.setToolTipText("查找与替换"); timeButton.setToolTipText("插入时间/日期"); fontButton.setToolTipText("设置字体"); boldButton.setToolTipText("粗体"); italicButton.setToolTipText("斜体"); fgcolorButton.setToolTipText("设置字体颜色"); bgcolorButton.setToolTipText("设置背景颜色"); helpButton.setToolTipText("帮助"); // 设置撤消、重做、剪切、复制、粘贴、删除等工具栏按钮不可用时的图片(灰色) undoButton.setDisabledIcon(new ImageIcon("Icons/undo1.gif")); cutButton.setDisabledIcon(new ImageIcon("Icons/cut1.gif")); copyButton.setDisabledIcon(new ImageIcon("Icons/copy1.gif")); pasteButton.setDisabledIcon(new ImageIcon("Icons/paste1.gif")); deleteButton.setDisabledIcon(new ImageIcon("Icons/delete1.gif")); // ------------------------向工具栏添加按钮 toolBar.add(newButton); toolBar.add(openButton); toolBar.add(saveButton); toolBar.add(saveAsButton); toolBar.add(printButton); toolBar.add(undoButton); toolBar.add(cutButton); toolBar.add(copyButton); toolBar.add(pasteButton); toolBar.add(deleteButton); toolBar.add(searchButton); toolBar.add(timeButton); toolBar.add(fontButton); toolBar.add(boldButton); toolBar.add(italicButton); toolBar.add(fgcolorButton); toolBar.add(bgcolorButton); toolBar.add(helpButton); // --------------------------------------向容器添加工具栏 container.add(toolBar, BorderLayout.NORTH); // -----------------------------------创建和添加状态栏 statusBar = new JToolBar(); statusBar.setLayout(new FlowLayout(FlowLayout.LEFT)); statusLabel1 = new JLabel("按F1获取帮助 "); statusLabel2 = new JLabel(" 当前时间：" + hour + ":" + min + ":" + second); statusLabel3 = new JLabel(" 当前光标所在行数" + getlineNumber()); statusBar.add(statusLabel1); statusBar.addSeparator(); statusBar.add(statusLabel2); statusBar.addSeparator(); statusBar.add(statusLabel3); container.add(statusBar, BorderLayout.SOUTH); statusBar.setVisible(true); // ------------------------------------改变标题栏窗口左侧默认图标 Toolkit tk = Toolkit.getDefaultToolkit(); Image image = tk.createImage("Icons/notepad.gif"); this.setIconImage(image); this.setJMenuBar(MenuBar); // 向窗口添加菜单条 container.add(scroll, BorderLayout.CENTER); // 向容器添加文本编辑区 this.pack(); this.setSize(800, 800); this.setVisible(true); checkMenuItemEnabled(); Text.requestFocus(); //this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent evt) { checkText(); } }); Clock clock = new Clock(); clock.start(); } public void checkText() { Text.requestFocus(); String currentValue = Text.getText(); boolean isTextChange = (currentValue.equals(oldValue)) ? false : true; if (isTextChange) { int saveChoose = JOptionPane.showConfirmDialog(this, "您的文件尚未保存。是否保存?", "提示", JOptionPane.YES_NO_CANCEL_OPTION); if (saveChoose == JOptionPane.YES_OPTION) { JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); fileChooser.setApproveButtonText("确定"); fileChooser.setDialogTitle("另存为"); int result = fileChooser.showSaveDialog(this); if (result == JFileChooser.CANCEL_OPTION) { statusLabel1.setText("您没有选择任何文件"); return; } saveFileName = fileChooser.getSelectedFile(); if (saveFileName == null || saveFileName.getName().equals("")) JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE); else { saveFile(); Text.setText(""); this.setTitle("新建文本"); statusLabel1.setText("　新建文本"); } } else if (saveChoose == JOptionPane.NO_OPTION) { System.exit(0); } else if (saveChoose == JOptionPane.CANCEL_OPTION) { Text.requestFocus(); } } else if (!isTextChange) { System.exit(0); } } public void checkMenuItemEnabled() { String selectText = Text.getSelectedText(); if (selectText == null) { mEdit_Cut.setEnabled(false); popupMenu_Cut.setEnabled(false); cutButton.setEnabled(false); mEdit_Copy.setEnabled(false); popupMenu_Copy.setEnabled(false); copyButton.setEnabled(false); mEdit_Del.setEnabled(false); popupMenu_Delete.setEnabled(false); deleteButton.setEnabled(false); } else { mEdit_Cut.setEnabled(true); popupMenu_Cut.setEnabled(true); cutButton.setEnabled(true); mEdit_Copy.setEnabled(true); popupMenu_Copy.setEnabled(true); copyButton.setEnabled(true); mEdit_Del.setEnabled(true); popupMenu_Delete.setEnabled(true); deleteButton.setEnabled(true); } // 粘贴功能可用性判断 Transferable contents = clipBoard.getContents(this); if (contents == null) { mEdit_Paste.setEnabled(false); popupMenu_Paste.setEnabled(false); pasteButton.setEnabled(false); } else { mEdit_Paste.setEnabled(true); popupMenu_Paste.setEnabled(true); pasteButton.setEnabled(true); } } public int getlineNumber() { int totalLine = Text.getLineCount(); int[] lineNumber = new int[totalLine + 1]; int pos = 0, t = 0, num = 0, i = 0; String s = Text.getText(); while (true) { pos = s.indexOf('/12', pos); // 返回 /n 所在的位置 if (pos == -1) break; lineNumber[t++] = pos++; } if (Text.getCaretPosition() <= lineNumber[0]) num = 1; else { if (Text.getCaretPosition() > lineNumber[Text.getLineCount() - 1]) num = Text.getLineCount(); for (i = 0; i < totalLine + 1; i++) { if (Text.getCaretPosition() <= lineNumber[i]) { num = i + 1; break; } else continue; } } return num; } public void saveFile() { try { FileWriter fw = new FileWriter(saveFileName); fw.write(Text.getText()); fw.close(); } catch (Exception e) { } } public void mySearch() { final JDialog findDialog = new JDialog(this, "查找与替换", true); Container con = findDialog.getContentPane(); con.setLayout(new FlowLayout(FlowLayout.LEFT)); JLabel searchContentLabel = new JLabel("查找内容(N) :"); JLabel replaceContentLabel = new JLabel("替换为(P)　 :"); final JTextField findText = new JTextField(22); final JTextField replaceText = new JTextField(22); final JCheckBox matchcase = new JCheckBox("区分大小写"); ButtonGroup bGroup = new ButtonGroup(); final JRadioButton up = new JRadioButton("向上(U)"); final JRadioButton down = new JRadioButton("向下(D)"); down.setSelected(true); bGroup.add(up); bGroup.add(down); JButton searchNext = new JButton("查找下一个(F)"); JButton replace = new JButton("替换(R)"); final JButton replaceAll = new JButton("全部替换(A)"); searchNext.setPreferredSize(new Dimension(110, 22)); replace.setPreferredSize(new Dimension(110, 22)); replaceAll.setPreferredSize(new Dimension(110, 22)); // "替换"按钮的事件处理 replace.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (replaceText.getText().length() == 0 && Text.getSelectedText() != null) Text.replaceSelection(""); if (replaceText.getText().length() > 0 && Text.getSelectedText() != null) Text.replaceSelection(replaceText.getText()); } }); // "替换全部"按钮的事件处理 replaceAll.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Text.setCaretPosition(0); // 将光标放到编辑区开头 int a = 0, b = 0, replaceCount = 0; if (findText.getText().length() == 0) { JOptionPane.showMessageDialog(findDialog, "请填写查找内容!", "提示", JOptionPane.WARNING_MESSAGE); findText.requestFocus(true); return; } while (a > -1) { int FindStartPos = Text.getCaretPosition(); String str1, str2, str3, str4, strA, strB; str1 = Text.getText(); str2 = str1.toLowerCase(); str3 = findText.getText(); str4 = str3.toLowerCase(); if (matchcase.isSelected()) { strA = str1; strB = str3; } else { strA = str2; strB = str4; } if (up.isSelected()) { if (Text.getSelectedText() == null) { a = strA.lastIndexOf(strB, FindStartPos - 1); } else { a = strA.lastIndexOf(strB, FindStartPos - findText.getText().length() - 1); } } else if (down.isSelected()) { if (Text.getSelectedText() == null) { a = strA.indexOf(strB, FindStartPos); } else { a = strA.indexOf(strB, FindStartPos - findText.getText().length() + 1); } } if (a > -1) { if (up.isSelected()) { Text.setCaretPosition(a); b = findText.getText().length(); Text.select(a, a + b); } else if (down.isSelected()) { Text.setCaretPosition(a); b = findText.getText().length(); Text.select(a, a + b); } } else { if (replaceCount == 0) { JOptionPane.showMessageDialog(findDialog, "找不到您查找的内容!", "记事本", JOptionPane.INFORMATION_MESSAGE); } else { JOptionPane.showMessageDialog(findDialog, "成功替换" + replaceCount + "个匹配内容!", "替换成功", JOptionPane.INFORMATION_MESSAGE); } } if (replaceText.getText().length() == 0 && Text.getSelectedText() != null) { Text.replaceSelection(""); replaceCount++; } if (replaceText.getText().length() > 0 && Text.getSelectedText() != null) { Text.replaceSelection(replaceText.getText()); replaceCount++; } }// end while } }); /* "替换全部"按钮的事件处理结束 */ // "查找下一个"按钮事件处理 searchNext.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int a = 0, b = 0; int FindStartPos = Text.getCaretPosition(); String str1, str2, str3, str4, strA, strB; str1 = Text.getText(); str2 = str1.toLowerCase(); str3 = findText.getText(); str4 = str3.toLowerCase(); // "区分大小写"的CheckBox被选中 if (matchcase.isSelected()) { strA = str1; strB = str3; } else { strA = str2; strB = str4; } if (up.isSelected()) { if (Text.getSelectedText() == null) { a = strA.lastIndexOf(strB, FindStartPos - 1); } else { a = strA.lastIndexOf(strB, FindStartPos - findText.getText().length() - 1); } } else if (down.isSelected()) { if (Text.getSelectedText() == null) { a = strA.indexOf(strB, FindStartPos); } else { a = strA.indexOf(strB, FindStartPos - findText.getText().length() + 1); } } if (a > -1) { if (up.isSelected()) { Text.setCaretPosition(a); b = findText.getText().length(); Text.select(a, a + b); } else if (down.isSelected()) { Text.setCaretPosition(a); b = findText.getText().length(); Text.select(a, a + b); } } else { JOptionPane.showMessageDialog(null, "找不到您查找的内容!", "记事本", JOptionPane.INFORMATION_MESSAGE); } } });/* "查找下一个"按钮事件处理结束 */ // "取消"按钮及事件处理 JButton cancel = new JButton("取消"); cancel.setPreferredSize(new Dimension(110, 22)); cancel.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { findDialog.dispose(); } }); // 创建"查找与替换"对话框的界面 JPanel bottomPanel = new JPanel(); JPanel centerPanel = new JPanel(); JPanel topPanel = new JPanel(); JPanel direction = new JPanel(); direction.setBorder(BorderFactory.createTitledBorder("方向 ")); direction.add(up); direction.add(down); direction.setPreferredSize(new Dimension(170, 60)); JPanel replacePanel = new JPanel(); replacePanel.setLayout(new GridLayout(2, 1)); replacePanel.add(replace); replacePanel.add(replaceAll); topPanel.add(searchContentLabel); topPanel.add(findText); topPanel.add(searchNext); centerPanel.add(replaceContentLabel); centerPanel.add(replaceText); centerPanel.add(replacePanel); bottomPanel.add(matchcase); bottomPanel.add(direction); bottomPanel.add(cancel); con.add(topPanel); con.add(centerPanel); con.add(bottomPanel); // 设置"查找与替换"对话框的大小、可更改大小(否)、位置和可见性 findDialog.setSize(410, 210); findDialog.setResizable(false); findDialog.setLocation(230, 280); findDialog.setVisible(true); } /* 方法mySearch()结束 */ // 实现ActionListener的事件处理方法public void actionPerformed(ActionEvent e) public void actionPerformed(ActionEvent e) { // 新建 if (e.getActionCommand().equals("新建(N)") || e.getSource() == newButton) // 最初发生 Event 的对象 // if(e.getSource()==mFile_New||e.getSource()==newButton) { Text.requestFocus(); String currentValue = Text.getText(); boolean isTextChange = (currentValue.equals(oldValue)) ? false : true; if (isTextChange) { int saveChoose = JOptionPane.showConfirmDialog(this, "您的文件尚未保存。是否保存?", "提示", JOptionPane.YES_NO_CANCEL_OPTION); if (saveChoose == JOptionPane.YES_OPTION) { JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); fileChooser.setApproveButtonText("确定"); fileChooser.setDialogTitle("另存为"); int result = fileChooser.showSaveDialog(this); if (result == JFileChooser.CANCEL_OPTION) { statusLabel1.setText("您没有选择任何文件"); return; } saveFileName = fileChooser.getSelectedFile(); if (saveFileName == null || saveFileName.getName().equals("")) JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE); else { saveFile(); Text.setText(""); this.setTitle("新建文本"); statusLabel1.setText("　新建文本"); } } else if (saveChoose == JOptionPane.NO_OPTION) { Text.replaceRange("", 0, Text.getText().length()); statusLabel1.setText("　新建文件"); this.setTitle("无标题 - 记事本"); isNewFile = true; undo.discardAllEdits(); // 撤消所有的"撤消"操作 mEdit_Undo.setEnabled(false); popupMenu_Undo.setEnabled(false); undoButton.setEnabled(false); redoButton.setEnabled(false); oldValue = Text.getText(); } else if (saveChoose == JOptionPane.CANCEL_OPTION) { return; } } else { // Text.replaceRange("", 0, Text.getText().length()); Text.setText(""); statusLabel1.setText("　新建文件"); this.setTitle("无标题 - 记事本"); isNewFile = true; undo.discardAllEdits(); mEdit_Undo.setEnabled(false); popupMenu_Undo.setEnabled(false); undoButton.setEnabled(false); oldValue = Text.getText(); } }// 新建处理结束 // 打开 else if (e.getActionCommand().equals("打开(O)") || e.getSource() == openButton) { Text.requestFocus(); String currentValue = Text.getText(); boolean isTextChange = (currentValue.equals(oldValue)) ? false : true; if (isTextChange) { int saveChoose = JOptionPane.showConfirmDialog(this, "您的文件尚未保存。是否保存?", "提示", JOptionPane.YES_NO_CANCEL_OPTION); if (saveChoose == JOptionPane.YES_OPTION) { JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); fileChooser.setApproveButtonText("确定"); fileChooser.setDialogTitle("另存为"); int result = fileChooser.showSaveDialog(this); if (result == JFileChooser.CANCEL_OPTION) { statusLabel1.setText("您没有选择任何文件"); return; } saveFileName = fileChooser.getSelectedFile(); if (saveFileName == null || saveFileName.getName().equals("")) JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE); else { saveFile(); isNewFile = false; currentFile = saveFileName; oldValue = Text.getText(); this.setTitle(saveFileName.getName() + " - 记事本"); statusLabel1.setText("　当前打开文件:" + saveFileName.getAbsoluteFile()); } } else if (saveChoose == JOptionPane.NO_OPTION) { String str = null; JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); fileChooser.setApproveButtonText("确定"); fileChooser.setDialogTitle("打开文件"); int result = fileChooser.showOpenDialog(this); if (result == JFileChooser.CANCEL_OPTION) { statusLabel1.setText("您没有选择任何文件"); return; } fileName = fileChooser.getSelectedFile(); if (fileName == null || fileName.getName().equals("")) JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE); else { try { FileReader fr = new FileReader(fileName); BufferedReader bfr = new BufferedReader(fr); Text.setText(""); while ((str = bfr.readLine()) != null) {// 每次读取一行，直到文件结束 Text.append(str + "/15/12"); }// endwhile this.setTitle(fileName.getName() + " - 记事本"); statusLabel1.setText("　当前打开文件:" + fileName.getAbsoluteFile()); fr.close(); isNewFile = false; currentFile = fileName; oldValue = Text.getText(); } catch (IOException ioException) { } } } else { return; } } else { String str = null; JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); fileChooser.setApproveButtonText("确定"); fileChooser.setDialogTitle("打开文件"); int result = fileChooser.showOpenDialog(this); if (result == JFileChooser.CANCEL_OPTION) { statusLabel1.setText("　您没有选择任何文件"); return; } fileName = fileChooser.getSelectedFile(); if (fileName == null || fileName.getName().equals("")) JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE); else { try { FileReader fr = new FileReader(fileName); BufferedReader bfr = new BufferedReader(fr); Text.setText(""); while ((str = bfr.readLine()) != null) {// 每次读取一行，直到文件结束 Text.append(str + "/15/12"); }// endwhile this.setTitle(fileName.getName() + " - 记事本"); statusLabel1.setText("　当前打开文件:" + fileName.getAbsoluteFile()); fr.close(); isNewFile = false; currentFile = fileName; oldValue = Text.getText(); } catch (IOException ioException) { } } } }// "打开"处理结束 // 保存 else if (e.getSource() == mFile_Save || e.getSource() == saveButton) { Text.requestFocus(); if (isNewFile) { JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); fileChooser.setApproveButtonText("确定"); fileChooser.setDialogTitle("另存为"); int result = fileChooser.showSaveDialog(this); if (result == JFileChooser.CANCEL_OPTION) { statusLabel1.setText("　您没有选择任何文件"); return; } saveFileName = fileChooser.getSelectedFile(); if (saveFileName == null || saveFileName.getName().equals("")) JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE); else { saveFile(); isNewFile = false; currentFile = saveFileName; oldValue = Text.getText(); this.setTitle(saveFileName.getName() + " - 记事本"); statusLabel1.setText("　当前打开文件:" + saveFileName.getAbsoluteFile()); } } else { try { FileWriter fw = new FileWriter(currentFile); BufferedWriter bfw = new BufferedWriter(fw); bfw.write(Text.getText(), 0, Text.getText().length()); bfw.flush(); fw.close(); } catch (IOException ioException) { } } }// "保存"处理结束 // 另存为 else if (e.getSource() == mFile_ASave || e.getSource() == saveAsButton) { Text.requestFocus(); JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); fileChooser.setApproveButtonText("确定"); fileChooser.setDialogTitle("另存为"); int result = fileChooser.showSaveDialog(this); if (result == JFileChooser.CANCEL_OPTION) { statusLabel1.setText("　您没有选择任何文件"); return; } saveFileName = fileChooser.getSelectedFile(); if (saveFileName == null || saveFileName.getName().equals("")) JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE); else { saveFile(); isNewFile = false; currentFile = saveFileName; oldValue = Text.getText(); this.setTitle(saveFileName.getName() + " - 记事本"); statusLabel1.setText("　当前打开文件:" + saveFileName.getAbsoluteFile()); } }// "另存为"处理结束 // 打印 else if (e.getSource() == mFile_Print || e.getSource() == printButton) { Text.requestFocus(); JOptionPane.showMessageDialog(this, "此功能尚未添加!", "提示", JOptionPane.WARNING_MESSAGE); } // 退出 else if (e.getSource() == mFile_Exit) { int exitChoose = JOptionPane.showConfirmDialog(this, "确定要退出么？", "退出提示", JOptionPane.OK_CANCEL_OPTION); if (exitChoose == JOptionPane.OK_OPTION) { checkText(); } else { return; } } // 撤消 else if (e.getSource() == mEdit_Undo || e.getSource() == popupMenu_Undo || e.getSource() == undoButton) { Text.requestFocus(); if (undo.canUndo()) { try { undo.undo(); } catch (CannotUndoException ex) { System.out.println("Unable to undo: " + ex); ex.printStackTrace(); } if (!undo.canUndo()) { mEdit_Undo.setEnabled(false); popupMenu_Undo.setEnabled(false); undoButton.setEnabled(false); } } } // 剪切 else if (e.getSource() == mEdit_Cut || e.getSource() == popupMenu_Cut || e.getSource() == cutButton) { Text.requestFocus(); String text = Text.getSelectedText(); StringSelection selection = new StringSelection(text); clipBoard.setContents(selection, null); Text.replaceRange("", Text.getSelectionStart(), Text.getSelectionEnd()); checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性 } // 复制 else if (e.getSource() == mEdit_Copy || e.getSource() == popupMenu_Copy || e.getSource() == copyButton) { Text.requestFocus(); String text = Text.getSelectedText(); StringSelection selection = new StringSelection(text); clipBoard.setContents(selection, null); checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性 } // 粘贴 else if (e.getSource() == mEdit_Paste || e.getSource() == popupMenu_Paste || e.getSource() == pasteButton) { Text.requestFocus(); Transferable contents = clipBoard.getContents(this); if (contents == null) return; String text; text = ""; try { text = (String) contents.getTransferData(DataFlavor.stringFlavor); } catch (Exception exception) { } Text.replaceRange(text, Text.getSelectionStart(), Text.getSelectionEnd()); checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性 } // 删除 else if (e.getSource() == mEdit_Del || e.getSource() == popupMenu_Delete || e.getSource() == deleteButton) { Text.requestFocus(); Text.replaceRange("", Text.getSelectionStart(), Text.getSelectionEnd()); checkMenuItemEnabled(); // 设置剪切、复制、粘贴、删除等功能的可用性 } // 查找 else if (e.getSource() == mEdit_Search || e.getSource() == searchButton) { Text.requestFocus(); if (e.getSource() == searchButton) { Text.requestFocus(); Text.setCaretPosition(0); } mySearch(); } // 查找下一个(此功能尚未能很好实现，所以就先用查找功能来代替) else if (e.getSource() == mEdit_SearchNext) { mySearch(); } // 替换(与查找功能集成在一起了) else if (e.getSource() == mEdit_Replace) { mySearch(); } // 转到 else if (e.getSource() == mEdit_Turnto) { final JDialog gotoDialog = new JDialog(this, "转到下列行"); JLabel gotoLabel = new JLabel("行数(L):"); final JTextField linenum = new JTextField(5); linenum.setText("1"); linenum.selectAll(); JButton okButton = new JButton("确定"); okButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int totalLine = Text.getLineCount(); int[] lineNumber = new int[totalLine + 1]; String s = Text.getText(); int pos = 0, t = 0; while (true) { pos = s.indexOf('/12', pos); // System.out.println("引索pos:"+pos); if (pos == -1) break; lineNumber[t++] = pos++; } int gt = 1; try { gt = Integer.parseInt(linenum.getText()); } catch (NumberFormatException efe) { JOptionPane.showMessageDialog(null, "请输入行数!", "提示", JOptionPane.WARNING_MESSAGE); linenum.requestFocus(true); return; } if (gt < 2 || gt >= totalLine) { if (gt < 2) Text.setCaretPosition(0); else Text.setCaretPosition(s.length()); } else Text.setCaretPosition(lineNumber[gt - 2] + 1); gotoDialog.dispose(); } }); JButton cancelButton = new JButton("取消"); cancelButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { gotoDialog.dispose(); } }); Container con = gotoDialog.getContentPane(); con.setLayout(new FlowLayout()); con.add(gotoLabel); con.add(linenum); con.add(okButton); con.add(cancelButton); gotoDialog.setSize(200, 100); gotoDialog.setResizable(false); gotoDialog.setLocation(300, 280); gotoDialog.setVisible(true); }// "转到"处理结束 // 插入时间日期 else if (e.getSource() == mEdit_TimeDate || e.getSource() == timeButton) { Text.requestFocus(); SimpleDateFormat currentDateTime = new SimpleDateFormat("HH:mm yyyy-MM-dd"); Text.insert(currentDateTime.format(new Date()), Text.getCaretPosition()); } // 全选 else if (e.getSource() == popupMenu_SelectAll || e.getSource() == mEdit_SelectAll) { Text.selectAll(); } // 自动换行 else if (e.getSource() == formatMenu_LineWrap) { if (formatMenu_LineWrap.getState()) { Text.setLineWrap(true); } else Text.setLineWrap(false); } // 字体设置 else if (e.getSource() == formatMenu_Font || e.getSource() == fontButton) { Text.requestFocus(); new MyFont(); } // 设置字体颜色(前景色) else if (e.getSource() == formatMenu_Color_FgColor || e.getSource() == fgcolorButton) { Text.requestFocus(); Color color = JColorChooser.showDialog(this, "更改字体颜色", Color.black); if (color != null) { Text.setForeground(color); } else return; } // 设置编辑区背景颜色 else if (e.getSource() == formatMenu_Color_BgColor || e.getSource() == bgcolorButton) { Text.requestFocus(); Color color = JColorChooser.showDialog(this, "更改背景颜色", Color.white); if (color != null) { Text.setBackground(color); } else return; } // 设置状态栏可见性 else if (e.getSource() == viewMenu_Status) { if (viewMenu_Status.getState()) statusBar.setVisible(true); else statusBar.setVisible(false); } // 帮助主题 else if (e.getSource() == mHelp_HelpTopics || e.getSource() == helpButton) { JOptionPane.showMessageDialog(this, "记事本支持拖入文本读取/n" + "由于对编码不熟悉保存文/n件时未进行编码转换/n", "帮助主题", JOptionPane.INFORMATION_MESSAGE); } // 关于 else if (e.getSource() == mHelp_About) { JOptionPane.showMessageDialog(this, " VXBB的记事本/n" + " QQ：491697374/n" + " JAVA图形界面练习/n", "关于记事本", JOptionPane.INFORMATION_MESSAGE); } // 工具栏"粗体"按钮事件处理 else if (e.getSource() == boldButton) { Text.requestFocus(); Font tempFont = Text.getFont(); if (Text.getFont().getStyle() == Font.PLAIN) { tempFont = new Font(Text.getFont().getFontName(), Font.BOLD, Text.getFont().getSize()); } else if (Text.getFont().getStyle() == Font.ITALIC) { tempFont = new Font(Text.getFont().getFontName(), Font.BOLD + Font.ITALIC, Text.getFont().getSize()); } else if (Text.getFont().getStyle() == Font.BOLD) { tempFont = new Font(Text.getFont().getFontName(), Font.PLAIN, Text.getFont().getSize()); } else if (Text.getFont().getStyle() == (Font.BOLD + Font.ITALIC)) { tempFont = new Font(Text.getFont().getFontName(), Font.ITALIC, Text.getFont().getSize()); } Text.setFont(tempFont); } // 工具栏"斜体"按钮事件处理 else if (e.getSource() == italicButton) { Text.requestFocus(); Font tempFont = Text.getFont(); if (Text.getFont().getStyle() == Font.PLAIN) { tempFont = new Font(Text.getFont().getFontName(), Font.ITALIC, Text.getFont().getSize()); } else if (Text.getFont().getStyle() == Font.ITALIC) { tempFont = new Font(Text.getFont().getFontName(), Font.PLAIN, Text.getFont().getSize()); } else if (Text.getFont().getStyle() == Font.BOLD) { tempFont = new Font(Text.getFont().getFontName(), Font.BOLD + Font.ITALIC, Text.getFont().getSize()); } else if (Text.getFont().getStyle() == (Font.BOLD + Font.ITALIC)) { tempFont = new Font(Text.getFont().getFontName(), Font.BOLD, Text.getFont().getSize()); } Text.setFont(tempFont); } }/* 方法actionPerformed()结束 */ class Clock extends Thread { // 模拟时钟 public void run() { while (true) { GregorianCalendar time = new GregorianCalendar(); int hour = time.get(Calendar.HOUR_OF_DAY); int min = time.get(Calendar.MINUTE); int second = time.get(Calendar.SECOND); statusLabel2.setText(" 当前时间：" + hour + ":" + min + ":" + second); try { Thread.sleep(950); } catch (InterruptedException exception) { } } } } // 用于设置字体的类MyFont class MyFont implements ActionListener { final JDialog fontDialog; final JTextField tfFont, tfSize, tfStyle; final int fontStyleConst[] = { Font.PLAIN, Font.BOLD, Font.ITALIC, Font.BOLD + Font.ITALIC }; final JList listStyle, listFont, listSize; JLabel sample; JPanel pane1, pane2, pane3, pane4; // 构造函数MyFont public MyFont() { fontDialog = new JDialog(Notepad4.this, "字体设置", true); Container con = fontDialog.getContentPane(); con.setLayout(new BoxLayout(con, BoxLayout.Y_AXIS)); pane1 = new JPanel(); pane2 = new JPanel(); pane3 = new JPanel(); pane4 = new JPanel(); Font currentFont = Text.getFont(); JLabel lblFont = new JLabel("字体(F):"); JLabel lblStyle = new JLabel("字形(Y):"); JLabel lblSize = new JLabel("大小(S):"); lblStyle.setHorizontalAlignment(SwingConstants.CENTER); lblSize.setHorizontalAlignment(SwingConstants.CENTER); lblFont.setPreferredSize(new Dimension(91, 20)); lblStyle.setPreferredSize(new Dimension(82, 20)); lblSize.setPreferredSize(new Dimension(100, 20)); tfFont = new JTextField(13); tfFont.setText(currentFont.getFontName()); tfFont.selectAll(); tfFont.setPreferredSize(new Dimension(200, 20)); tfStyle = new JTextField(10); if (currentFont.getStyle() == Font.PLAIN) tfStyle.setText("常规"); else if (currentFont.getStyle() == Font.BOLD) tfStyle.setText("粗体"); else if (currentFont.getStyle() == Font.ITALIC) tfStyle.setText("斜体"); else if (currentFont.getStyle() == (Font.BOLD + Font.ITALIC)) tfStyle.setText("粗斜体"); tfFont.selectAll(); tfStyle.setPreferredSize(new Dimension(200, 20)); tfSize = new JTextField(7); tfSize.setText(currentFont.getSize() + ""); tfSize.selectAll(); tfSize.setPreferredSize(new Dimension(200, 20)); final String fontStyle[] = { "常规", "粗体", "斜体", "粗斜体" }; listStyle = new JList(fontStyle); GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); final String fontName[] = ge.getAvailableFontFamilyNames(); int defaultFontIndex = 0; for (int i = 0; i < fontName.length; i++) { if (fontName[i].equals(currentFont.getFontName())) { defaultFontIndex = i; break; } } listFont = new JList(fontName); listFont.setSelectedIndex(defaultFontIndex); listFont.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); listFont.setVisibleRowCount(7); listFont.setFixedCellWidth(99); listFont.setFixedCellHeight(20); listFont.addListSelectionListener(new ListSelectionListener() { public void valueChanged(ListSelectionEvent event) { tfFont.setText(fontName[listFont.getSelectedIndex()]); tfFont.requestFocus(); tfFont.selectAll(); updateSample(); } }); listStyle.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); if (currentFont.getStyle() == Font.PLAIN) listStyle.setSelectedIndex(0); else if (currentFont.getStyle() == Font.BOLD) listStyle.setSelectedIndex(1); else if (currentFont.getStyle() == Font.ITALIC) listStyle.setSelectedIndex(2); else if (currentFont.getStyle() == (Font.BOLD + Font.ITALIC)) listStyle.setSelectedIndex(3); listStyle.setVisibleRowCount(7); listStyle.setFixedCellWidth(85); listStyle.setFixedCellHeight(20); listStyle.addListSelectionListener(new ListSelectionListener() { public void valueChanged(ListSelectionEvent event) { tfStyle.setText(fontStyle[listStyle.getSelectedIndex()]); tfStyle.requestFocus(); tfStyle.selectAll(); updateSample(); } }); final String fontSize[] = { "8", "9", "10", "11", "12", "14", "16", "18", "20", "22", "24", "26", "28", "36", "48", "72" }; listSize = new JList(fontSize); int defaultFontSizeIndex = 0; for (int i = 0; i < fontSize.length; i++) { if (fontSize[i].equals(currentFont.getSize() + "")) { defaultFontSizeIndex = i; break; } } listSize.setSelectedIndex(defaultFontSizeIndex); listSize.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); listSize.setVisibleRowCount(7); listSize.setFixedCellWidth(50); listSize.setFixedCellHeight(20); listSize.addListSelectionListener(new ListSelectionListener() { public void valueChanged(ListSelectionEvent event) { tfSize.setText(fontSize[listSize.getSelectedIndex()]); tfSize.requestFocus(); tfSize.selectAll(); updateSample(); } }); fontOkButton = new JButton("确定"); fontOkButton.addActionListener(this); JButton cancelButton = new JButton("取消"); cancelButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { fontDialog.dispose(); } }); sample = new JLabel(" 记事本 "); sample.setHorizontalAlignment(SwingConstants.CENTER); sample.setPreferredSize(new Dimension(150, 31)); JPanel samplePanel = new JPanel(); samplePanel.setBorder(BorderFactory.createTitledBorder("示例")); samplePanel.add(sample); pane1.add(lblFont); pane1.add(lblStyle); pane1.add(lblSize); pane2.add(tfFont); pane2.add(tfStyle); pane2.add(tfSize); pane3.add(new JScrollPane(listFont)); pane3.add(new JScrollPane(listStyle)); pane3.add(new JScrollPane(listSize)); pane4.add(samplePanel); pane4.add(fontOkButton); pane4.add(cancelButton); con.add(pane1); con.add(pane2); con.add(pane3); con.add(pane4); updateSample(); fontDialog.pack(); fontDialog.setSize(400, 400); fontDialog.setLocation(200, 200); fontDialog.setResizable(false); fontDialog.setVisible(true); }// 构造函数结束 // 更新示例显示的字体和风格大小等 public void updateSample() { Font sampleFont = new Font(tfFont.getText(), fontStyleConst[listStyle.getSelectedIndex()], Integer.parseInt(tfSize.getText())); sample.setFont(sampleFont); }// End method updateSample // 设置文本编辑区的字体 public void actionPerformed(ActionEvent e) { if (e.getSource() == fontOkButton) { Font tempFont = new Font(tfFont.getText(), fontStyleConst[listStyle.getSelectedIndex()], Integer.parseInt(tfSize.getText())); Text.setFont(tempFont); fontDialog.dispose(); } }// End method actionPerformed }/* End of class MyFont */ public void removeUpdate(DocumentEvent e) { mEdit_Undo.setEnabled(true); popupMenu_Undo.setEnabled(true); undoButton.setEnabled(true); } public void insertUpdate(DocumentEvent e) { mEdit_Undo.setEnabled(true); popupMenu_Undo.setEnabled(true); undoButton.setEnabled(true); } public void changedUpdate(DocumentEvent e) { mEdit_Undo.setEnabled(true); popupMenu_Undo.setEnabled(true); undoButton.setEnabled(true); } // End of DocumentListener // 实现了接口UndoableListener的类UndoHandler class UndoHandler implements UndoableEditListener { public void undoableEditHappened(UndoableEditEvent uee) { undo.addEdit(uee.getEdit()); } } public static void main(String s[]) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException { // UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); Text = new JTextArea(); Text.setDragEnabled(true); // 支持自动拖放 Text.setTransferHandler(new FileTransferHandler(Text)); new Notepad4(); } } class FileTransferHandler extends TransferHandler { JTextArea Text; public FileTransferHandler(JTextArea Text) { this.Text = Text; } public boolean importData(JComponent c, Transferable t) { try { List files = (List) t.getTransferData(DataFlavor.javaFileListFlavor); addFilesToFilePathList(files); return true; } catch (UnsupportedFlavorException ufe) { ufe.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return false; } public boolean canImport(JComponent c, DataFlavor[] flavors) { for (int i = 0; i < flavors.length; i++) { if (DataFlavor.javaFileListFlavor.equals(flavors[i])) { return true; } } return false; } private void addFilesToFilePathList(List files) { for (Iterator iter = files.iterator(); iter.hasNext();) { File file = (File) iter.next(); String str = null; try { FileReader fr = new FileReader(file); BufferedReader bfr = new BufferedReader(fr); Text.setText(""); while ((str = bfr.readLine()) != null) { Text.append(str + "/15/12"); } } catch (Exception b) { } } } } JAVA记事本源代码 import java.awt.*; import javax.swing.*; import java.awt.event.*; import javax.swing.event.*; import java.util.*; //Date needed import java.io.PrintWriter; public class NotePad extends JFrame { JTextArea jta; class newl implements ActionListener { public void actionPerformed(ActionEvent e) { jta.setText(""); } } class openl implements ActionListener { public void actionPerformed(ActionEvent e) { JFileChooser jf=new JFileChooser(); jf.showOpenDialog(NotePad.this); } } //保存文件的监听 class savel implements ActionListener { public void actionPerformed(ActionEvent e) { JFileChooser jf = new JFileChooser(); jf.showSaveDialog(NotePad.this); } } //打印的监听 ? class printl implements ActionListener { public void actionPerformed(ActionEvent e) { // PrintWriter p = new PrintWriter(NotePad.this); } } //退出记事本的监听 class exitl implements ActionListener { public void actionPerformed(ActionEvent e) { System.exit(0);//退出 } } //拷贝的监听 class copyl implements ActionListener { public void actionPerformed(ActionEvent e) { jta.copy(); } } //粘贴的监听 class pastel implements ActionListener { public void actionPerformed(ActionEvent e) { jta.paste(); } } //剪切的监听 class cutl implements ActionListener { public void actionPerformed(ActionEvent e) { jta.cut(); } } //查找的监听 //添加日期的监听 class datel implements ActionListener { public void actionPerformed(ActionEvent e) { Date d=new Date(); jta.append(d.toString()); } } //构造函数 public NotePad() { jta=new JTextArea("",24,40); JScrollPane jsp=new JScrollPane(jta); JMenuBar jmb=new JMenuBar(); JMenu mFile=new JMenu("File"); JMenu mEdit=new JMenu("Edit"); JMenuItem mNew=new JMenuItem("New",KeyEvent.VK_N); mNew.addActionListener(new newl()); mFile.add(mNew); JMenuItem mOpen=new JMenuItem("Open",KeyEvent.VK_O); mOpen.addActionListener(new openl()); mFile.add(mOpen); JMenuItem mSave=new JMenuItem("Save"); mSave.addActionListener(new savel()); mFile.add(mSave); mFile.addSeparator(); //添加分割线 JMenuItem mPrint = new JMenuItem("Print"); mPrint.addActionListener(new printl()); mFile.add(mPrint); mFile.addSeparator(); //添加分割线 JMenuItem mExit=new JMenuItem("Exit"); mExit.addActionListener(new exitl()); mFile.add(mExit); mFile.setMnemonic(KeyEvent.VK_F); //编辑菜单的子菜单的处理 JMenuItem jmi; jmi=new JMenuItem("Copy"); jmi.addActionListener(new copyl()); mEdit.add(jmi); jmi=new JMenuItem("Cut"); jmi.addActionListener(new cutl()); mEdit.add(jmi); jmi=new JMenuItem("Paste"); jmi.addActionListener(new pastel()); mEdit.add(jmi); mEdit.addSeparator(); //添加分割线 jmi=new JMenuItem("Find"); mEdit.add(jmi); jmi=new JMenuItem("FindNext"); mEdit.add(jmi); mEdit.addSeparator(); jmi=new JMenuItem("Select All"); mEdit.add(jmi); jmi=new JMenuItem("Date/Time"); jmi.addActionListener(new datel()); mEdit.add(jmi); jmb.add(mFile); jmb.add(mEdit); this.setJMenuBar(jmb); this.getContentPane().add(jsp); this.setSize(200,200); this.setVisible(true); } //主函数，程序入口点 public static void main(String s[]) { new NotePad(); } } 2008-07-30 10:23 闲着没事写的记事本代码，基本功能都有，还有鼠标右键粘贴等。 package day10.notepad; import java.awt.FileDialog; import java.awt.FlowLayout; import java.awt.event.*; import javax.swing.*; public class TestNotepad implements ActionListener, MouseListener{ private int set = 0; //查找位置 private JFrame jf = new JFrame("Notepad"); //面板 private JTextArea jta = new JTextArea(20, 30); //文本区 JScrollPane jsp = new JScrollPane(jta); //滚动条 private JTextField jtf = new JTextField(10); //单行文本区 private JTextField jtft = new JTextField(10); //单行文本区 //接收发送过来的请求，并做相应处理 public void actionPerformed(ActionEvent e) { String comm = e.getActionCommand(); if (comm.equals("新建...")) { new TestNotepad(); } if (comm.equals("保存")) { System.out.println("保存"); JFileChooser jc = new JFileChooser(); jc.setSize(300,300); jc.setVisible(true); } if (comm.equals("打开...")) { FileDialog fd = new FileDialog(jf, "打开..."); fd.getFilenameFilter(); fd.setVisible(true); fd.setLocation(400, 200); fd.setResizable(false); } if (comm.equals("退出")) { System.exit(0); } if (comm.equals("撤销")) { } if (comm.equals("剪切")) { jta.cut(); } if (comm.equals("复制")) { jta.copy(); } if (comm.equals("粘贴")) { jta.paste(); } if (comm.equals("删除")) { jta.cut(); } if ("查找...".equals(comm) || "替换...".equals(comm)) { JDialog jd = new JDialog(jf, comm); String label = comm.substring(0, 2); JButton jb = new JButton(label); jb.addActionListener(this); jd.setLayout(new FlowLayout()); jd.add(jtf); if ("替换...".equals(comm)) { JLabel jlt = new JLabel(">"); jd.add(jlt); jd.add(jtft); } jd.add(jb); if ("替换...".equals(comm)) { JButton jball = new JButton("替换全部"); jball.addActionListener(this); jd.add(jball); } jd.pack(); jd.setResizable(false); jd.setLocation(400, 240); jd.setVisible(true); } if (comm.equals("全选")) { jta.selectAll(); } if (comm.equals("关于...")) { JDialog jd = new JDialog(jf, "关于我..."); jd.setLayout(new FlowLayout()); JLabel jl = new JLabel("制作者: 李博 "); JLabel j2 = new JLabel("Email: amelody@163.com"); jd.add(jl); jd.add(j2); jd.setSize(180, 100); jd.setResizable(false); jd.setLocation(400, 240); jd.setVisible(true); } if (comm.equals("查找")) { String str = jtf.getText(); String strall = jta.getText(); int n = strall.indexOf(str, set); if (n != -1) { set = n + 1; jta.setSelectionStart(n); jta.setSelectionEnd(n + str.length()); } } if (comm.equals("替换") || comm.equals("替换全部")) { String str = jtf.getText(); String strall = jta.getText(); if (comm.equals("替换全部")) { int n1 = 0; while (true) { set = strall.indexOf(str, n1); if (set == -1) break; n1 = set + 1; jta.setSelectionStart(set); jta.setSelectionEnd(set + str.length()); jta.replaceSelection(jtft.getText()); } set = 0; } int n = strall.indexOf(str, set); if (n == -1) { set = 0; } else { set = n + 1; jta.setSelectionStart(n); jta.setSelectionEnd(n + str.length()); jta.replaceSelection(jtft.getText()); } } } public TestNotepad() { jta.setLineWrap(true); jta.addMouseListener(this); jf.add(jsp); JMenuBar jmb = new JMenuBar(); JMenu jm1 = new JMenu("文件"); String[] label1 = { "新建...", "打开...", "保存", "另存...", "退出" }; JMenuItem[] jmi1 = new JMenuItem[label1.length]; for (int i = 0; i < jmi1.length; i++) { jmi1[i] = new JMenuItem(label1[i]); jm1.add(jmi1[i]); jmi1[i].addActionListener(this); } jm1.insertSeparator(1); jm1.insertSeparator(3); jm1.insertSeparator(6); JMenu jm2 = new JMenu("编辑"); String[] label2 = { "撤销", "剪切", "复制", "粘贴", "删除", "查找...", "替换...", "全选" }; JMenuItem[] jmi2 = new JMenuItem[label2.length]; for (int i = 0; i < jmi2.length; i++) { jmi2[i] = new JMenuItem(label2[i]); jm2.add(jmi2[i]); jmi2[i].addActionListener(this); } jm2.insertSeparator(1); jm2.insertSeparator(5); jm2.insertSeparator(7); jm2.insertSeparator(10); JMenu jm3 = new JMenu("帮助"); JMenuItem jmi3 = new JMenuItem("关于..."); jm3.add(jmi3); jmi3.addActionListener(this); jmb.add(jm1); jmb.add(jm2); jmb.add(jm3); jf.setJMenuBar(jmb); jf.pack(); jf.setLocation(300, 200); jf.setVisible(true); //jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { jf.removeAll(); jf.dispose(); } }); } public static void main(String[] args) { new TestNotepad(); } //鼠标右键功能 public void mouseClicked(MouseEvent e) { JPopupMenu pp = new JPopupMenu(); if (e.getButton() == 3) { JMenuItem jmi1,jmi2,jmi3,jmi4; pp.add(jmi1 = new JMenuItem("剪切")); pp.add(jmi2 = new JMenuItem("复制")); pp.add(jmi3 = new JMenuItem("粘贴")); pp.addSeparator(); pp.add(jmi4 = new JMenuItem("全选")); jmi1.addActionListener(this); jmi2.addActionListener(this); jmi3.addActionListener(this); jmi4.addActionListener(this); pp.pack(); jf.add(pp); pp.setVisible(true); pp.show(e.getComponent(), e.getX(), e.getY()); } } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } public void mousePressed(MouseEvent e) { } public void mouseReleased(MouseEvent e) { } } Java记事本和界面收藏代码:(未完成，可初步使用) package proe; import java.awt.*; import javax.swing.*; /** * Title: 程序编辑器 * Description: 增强的文本编辑程序 * Copyright: Copyright (c) 2005 * Company: *@author 红色彼岸 *@version 0.1 */ public class ProE{ //定义编辑器的窗体 private ProEFrame proEWindow; //定义编辑器程序本身 private static ProE proEApp; /** *应用程序的开始点。 *@param args String[] */ public static void main(String[] args) { proEApp = new ProE(); proEApp.init(); } private void init() { //初始化窗体 proEWindow = new ProEFrame("程序编辑器"); Toolkit toolkit = proEWindow.getToolkit(); Dimension screenSize = toolkit.getScreenSize(); proEWindow.setBounds(0, 0, (int)screenSize.getWidth()/2, (int)screenSize.getHeight()/2); proEWindow.setVisible(true); } } ==================================================================================== package proe; import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.io.*; /** * Title: 程序编辑器 * Description: 增强的文本编辑程序 * Copyright: Copyright (c) 2005 * Company: *@author 红色彼岸 *@version 0.1 */ class ProEFrame extends JFrame{ private JFileChooser fileChooser = new JFileChooser(); private JMenuBar menuBar; private JMenu file, edit, format, help; private JMenuItem newItem, openItem, saveItem, saveAsItem, pageSetItem, printItem, exitItem; private JMenuItem undoItem, cutItem, copyItem, pasteItem, deleteItem, findItem, findNextItem, replaceItem, goToLineItem, selectAllItem, timeItem; private JMenuItem autoNextLineItem, fontItem; private JMenuItem helpItem, aboutItem; private JTextArea textArea; private JScrollPane scrollPane; private final int TAB_SIZE = 4; private File fileName; private boolean firstSave = true; public ProEFrame(String title) { //设置窗体的标题栏和默认关闭操作 super(title); setDefaultCloseOperation(DISPOSE_ON_CLOSE); //设置菜单栏和菜单的内容 menuBar = new JMenuBar(); file = new JMenu("文件(F)"); edit = new JMenu("编辑(E)"); format = new JMenu("格式(O)"); help = new JMenu("帮助(H)"); setQuickKey(file, 'F'); setQuickKey(edit, 'E'); setQuickKey(format, 'O'); setQuickKey(help, 'H'); newItem = new JMenuItem("新建(N)"); openItem = new JMenuItem("打开(O)..."); saveItem = new JMenuItem("保存(S)"); saveAsItem = new JMenuItem("另存为..."); pageSetItem = new JMenuItem("页面设置(U)..."); printItem = new JMenuItem("打印(P)..."); exitItem = new JMenuItem("退出"); setQuickKey(newItem, 'N'); setQuickKey(openItem, 'O'); setQuickKey(saveItem, 'S'); setQuickKey(pageSetItem, 'U'); setQuickKey(printItem, 'P'); file.add(newItem); file.add(openItem); file.add(saveItem); file.add(saveAsItem); file.addSeparator(); file.add(pageSetItem); file.add(printItem); file.addSeparator(); file.add(exitItem); undoItem = new JMenuItem("撤销(Z)"); cutItem = new JMenuItem("剪切(X)"); copyItem = new JMenuItem("复制(C)"); pasteItem = new JMenuItem("粘贴(V)"); deleteItem = new JMenuItem("删除"); findItem = new JMenuItem("查找(F)..."); findNextItem = new JMenuItem("查找下一个"); replaceItem = new JMenuItem("替换(R)..."); goToLineItem = new JMenuItem("转到(G)..."); selectAllItem = new JMenuItem("全选(A)"); timeItem = new JMenuItem("时间/日期"); setQuickKey(undoItem, 'Z'); setQuickKey(cutItem, 'X'); setQuickKey(copyItem, 'C'); setQuickKey(pasteItem, 'V'); setQuickKey(findItem, 'F'); setQuickKey(replaceItem, 'R'); setQuickKey(goToLineItem, 'G'); setQuickKey(selectAllItem, 'A'); edit.add(undoItem); edit.addSeparator(); edit.add(cutItem); edit.add(copyItem); edit.add(pasteItem); edit.add(deleteItem); edit.addSeparator(); edit.add(findItem); edit.add(findNextItem); edit.add(replaceItem); edit.add(goToLineItem); edit.addSeparator(); edit.add(selectAllItem); edit.add(timeItem); autoNextLineItem = new JMenuItem("自动换行(W)"); fontItem = new JMenuItem("字体..."); setQuickKey(autoNextLineItem, 'W'); format.add(autoNextLineItem); format.add(fontItem); helpItem = new JMenuItem("帮助主题(H)"); aboutItem = new JMenuItem("关于ProE"); setQuickKey(helpItem, 'H'); help.add(helpItem); help.add(aboutItem); menuBar.add(file); menuBar.add(edit); menuBar.add(format); menuBar.add(help); setJMenuBar(menuBar); textArea = new JTextArea(); textArea.setTabSize(TAB_SIZE); scrollPane = new JScrollPane(textArea); this.getContentPane().add(scrollPane, BorderLayout.CENTER); //测试用的方法 MenuItemEventHandler menuItemHandler = new MenuItemEventHandler(); newItem.addActionListener(menuItemHandler); openItem.addActionListener(menuItemHandler); saveItem.addActionListener(menuItemHandler); saveAsItem.addActionListener(menuItemHandler); pageSetItem.addActionListener(menuItemHandler); printItem.addActionListener(menuItemHandler); exitItem.addActionListener(menuItemHandler); undoItem.addActionListener(menuItemHandler); cutItem.addActionListener(menuItemHandler); copyItem.addActionListener(menuItemHandler); pasteItem.addActionListener(menuItemHandler); deleteItem.addActionListener(menuItemHandler); findItem.addActionListener(menuItemHandler); findNextItem.addActionListener(menuItemHandler); replaceItem.addActionListener(menuItemHandler); goToLineItem.addActionListener(menuItemHandler); selectAllItem.addActionListener(menuItemHandler); timeItem.addActionListener(menuItemHandler); autoNextLineItem.addActionListener(menuItemHandler); fontItem.addActionListener(menuItemHandler); helpItem.addActionListener(menuItemHandler); aboutItem.addActionListener(menuItemHandler); } //辅助方法：为菜单或者菜单项设定快捷键 private void setQuickKey(AbstractButton button, char quickKey) { String type = button.getClass().getName(); if(type.endsWith("JMenu")) button.setMnemonic(quickKey); else if(type.endsWith("JMenuItem")) { JMenuItem menuItem = (JMenuItem)button; menuItem.setAccelerator(KeyStroke.getKeyStroke(quickKey, InputEvent.CTRL_MASK)); } } //内部方法：响应菜单事件 private void newPerformed() { savePerformed(); textArea.setText(""); } private void openPerformed() { BufferedReader input = null; String text; int ret = fileChooser.showOpenDialog(this); if(ret != JFileChooser.APPROVE_OPTION) return; fileName = fileChooser.getSelectedFile(); if(fileName.exists() && fileName.canRead()) { setTitle("程序编辑器: " + fileName.getName()); textArea.setText(""); try{ input = new BufferedReader(new FileReader(fileName)); while((text = input.readLine()) != null) textArea.append(text + "/n"); input.close(); } catch(IOException e) { JOptionPane.showMessageDialog(this, "文件打开错误，没有打开"); } finally { input = null; } } } private void savePerformed() { PrintWriter output = null; if(firstSave == true) { saveAsPerformed(); firstSave = false; } else { try{ output = new PrintWriter(new FileWriter(fileName)); output.write(textArea.getText()); } catch(IOException e) { JOptionPane.showMessageDialog(this, "文件写入错误，没有保存"); } finally { output.close(); output = null; } } } private void saveAsPerformed() { PrintWriter output = null; int ret = fileChooser.showSaveDialog(this); if(ret != JFileChooser.APPROVE_OPTION) return; fileName = fileChooser.getSelectedFile(); setTitle("程序编辑器: " + fileName.getName()); try{ output = new PrintWriter(new FileWriter(fileName)); output.write(textArea.getText()); } catch(IOException e){ JOptionPane.showMessageDialog(this, "文件写入错误，没有保存"); } finally{ output.close(); output = null; } } private void pageSetPerformed() { System.out.println("显示页面设置对话框"); } private void printPerformed() { System.out.println("显示打印对话框"); } private void exitPerformed() { savePerformed(); dispose(); } private void undoPerformed() { System.out.println("撤销"); } private void cutPerformed() { System.out.println("剪切"); } private void copyPerformed() { System.out.println("复制"); } private void pastePerformed() { System.out.println("粘贴"); } private void deletePerformed() { System.out.println("删除"); } private void findPerformed() { System.out.println("查找"); } private void findNextPerformed() { System.out.println("查找下一个"); } private void replacePerformed() { System.out.println("替换"); } private void goToLinePerformed() { System.out.println("转到"); } private void selectAllPerformed() { System.out.println("全选"); } private void timePerformed() { System.out.println("时间/日期"); } private void autoNextLinePerformed() { System.out.println("自动换行"); } private void fontPerformed() { System.out.println("字体"); } private void helpPerformed() { System.out.println("帮助主题"); } private void aboutPerformed() { JOptionPane.showMessageDialog(this, "简陋的编辑器"); } /** * Title: * Description: 处理菜单出发的事件 * Copyright: Copyright (c) 2005 * Company: *@author 崔海成 *@version 0.1 */ class MenuItemEventHandler implements ActionListener{ public void actionPerformed(ActionEvent e) { JMenuItem item = (JMenuItem)e.getSource(); if(item == newItem) newPerformed(); else if(item == openItem) openPerformed(); else if(item == saveItem) savePerformed(); else if(item == saveAsItem) saveAsPerformed(); else if(item == pageSetItem) pageSetPerformed(); else if(item == printItem) printPerformed(); else if(item == exitItem) exitPerformed(); else if(item == undoItem) undoPerformed(); else if(item == cutItem) cutPerformed(); else if(item == copyItem) copyPerformed(); else if(item == pasteItem) pastePerformed(); else if(item == deleteItem) deletePerformed(); else if(item == findItem) findPerformed(); else if(item == findNextItem) findNextPerformed(); else if(item == replaceItem) replacePerformed(); else if(item == goToLineItem) goToLinePerformed(); else if(item == selectAllItem) selectAllPerformed(); else if(item == timeItem) timePerformed(); else if(item == autoNextLineItem) autoNextLinePerformed(); else if(item == fontItem) fontPerformed(); else if(item == helpItem) helpPerformed(); else if(item == aboutItem) aboutPerformed(); } } } 今天准备分析一个java的记事本收藏先附上源码: import java.lang.*; import java.awt.*; import java.io.*; import java.awt.datatransfer.*; import java.awt.event.*; public class EditorFrame extends Frame implements ActionListener { 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 EditorFrame( ) // EditorFrame initialzation { setTitle("NotePad"); 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()//添加窗体的关闭事件 { 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) { 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.getSelectionEnd()); } else if(eventSource == exitItem) { System.exit(0); } } public void readFile(String fileName) { try{ File 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) { try{ File file = new File (fileName); FileWriter writeOut = new FileWriter(file); writeOut.write(textArea.getText()); writeOut.close(); }catch(IOException e) { System.out.println("Error writing file"); } } public static void main(String[] args) { Frame frame = new EditorFrame(); frame.show(); } } 本程序的主要按如下思路编写的:1初始化一个编辑框的类,在其中添加需要用到的控件.2在编辑框中添加各个需要用到的各个组件,事实上在第一步中只是一个组件声明,在这一步中才为组件分配内存空间.在本步中实现窗体的关闭功能.3添加各个组件的事件.实现各自的功能.4实现编辑本的的输入输出功能.5设立mainmethord. MenuBar:是一个菜单条,但是不能直接用,先离开了,以后会继续写 java写的记事本收藏其实JAVA自带的例子就也有用JAVA写的记事本，在demo/jfc目录下。 import java.io.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.net.*; import java.awt.Font; import java.awt.print.*; import javax.swing.text.*; import java.awt.datatransfer.*; public class Mynote extends JFrame { public boolean changed; //控制文本域内文字是否改变情况。 public JTextArea jta=new JTextArea("", 60,60); public JScrollPane jsp=new JScrollPane(jta); public JMenuBar jmb; public JMenu jm,editjm,setjm,viewjm,helpjm; public JMenuItem newjmi,openjmi,savejmi,saveasjmi,printjmi,exitjmi; public JSeparator js1=new JSeparator(); public JSeparator js2=new JSeparator(); public ActionListener al=new A(); public String fileName=""; //定义保存的文件名 public JMenuItem copyjmi,pastejmi,cutjmi,findjmi,findnjmi,deletejmi,selectalljmi,undojmi; public JMenuItem fontjmi,fjmi,bjmi; //font设置字体样式 public JMenuItem toolsjmi; public JMenuItem aboutjmi; public JSeparator js3=new JSeparator(); public JSeparator js4=new JSeparator(); public JToolBar jtb; public String quick[]=new String[]{"new","open","save","saveas","delete","copy","paste","cut","selectall"}; PrinterJob prtMe = PrinterJob.getPrinterJob(); public Mynote() { this.setTitle("我的记事本"); this.setSize(new Dimension(400,400)); jta.getDocument().addDocumentListener(new DocumentListener() { public void insertUpdate(DocumentEvent e) { changed=true; } public void removeUpdate(DocumentEvent e) { changed=true; } public void changedUpdate(DocumentEvent e) { changed=true; } } ); jta.setBackground(Color.white); jta.setForeground(Color.black); jta.setFont(new Font("",Font.BOLD,12)); jsp.setViewportView(jta); this.getContentPane().add(jsp,BorderLayout.CENTER); this.Compose(); this.setJMenuBar(jmb); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { if(changed==true) { int n; Object[] option={"是","否"}; n=JOptionPane.showOptionDialog(null, "你的文件还没有保存，请保存后关闭！", "请保存", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, option, option[0]); switch(n) { case JOptionPane.YES_OPTION: doSave(fileName); break; case JOptionPane.NO_OPTION: break; default: break; } } System.exit(0); } }); } public void Compose() { //文件菜单布局newjmi,openjmi,savejmi,saveasjmi,printjmi,exitjmi jmb=new JMenuBar(); jm=new JMenu(); editjm=new JMenu(); newjmi=new JMenuItem(); openjmi=new JMenuItem(); savejmi=new JMenuItem(); saveasjmi=new JMenuItem(); printjmi=new JMenuItem(); exitjmi=new JMenuItem(); js1=new JSeparator(); js2=new JSeparator(); jm.setMnemonic(KeyEvent.VK_F);//定义快捷键 jm.setText("文件"); newjmi.setMnemonic(KeyEvent.VK_N); newjmi.setText("新建"); newjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK)); newjmi.addActionListener(al); jm.add(newjmi); jm.add(js1);//or:jm.addSeparator(); openjmi.setMnemonic(KeyEvent.VK_O); openjmi.setText("打开"); openjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK)); openjmi.addActionListener(al); jm.add(openjmi); savejmi.setMnemonic(KeyEvent.VK_S); savejmi.setText("保存"); savejmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK)); savejmi.addActionListener(al); jm.add(savejmi); saveasjmi.setMnemonic(KeyEvent.VK_A); saveasjmi.setText("另存为"); saveasjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MASK)); saveasjmi.addActionListener(al); jm.add(saveasjmi); printjmi.setMnemonic(KeyEvent.VK_A); printjmi.setText("打印"); printjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,InputEvent.CTRL_MASK)); printjmi.addActionListener(al); jm.add(printjmi); jm.add(js2); exitjmi.setMnemonic(KeyEvent.VK_X); exitjmi.setText("退出"); exitjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK)); exitjmi.addActionListener(al); jm.add(exitjmi); //文件菜单设置结束。copyjmi,pastejmi,cutjmi,findjmi,findnjmi,deletejmi,selectalljmi,undojmi; editjm.setText("编辑"); editjm.setMnemonic(KeyEvent.VK_E); copyjmi=new JMenuItem(); pastejmi=new JMenuItem(); cutjmi=new JMenuItem(); findjmi=new JMenuItem(); findnjmi=new JMenuItem(); deletejmi=new JMenuItem(); selectalljmi=new JMenuItem(); undojmi=new JMenuItem(); copyjmi.setText("复制"); copyjmi.setMnemonic(KeyEvent.VK_C); copyjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK)); copyjmi.addActionListener(al); editjm.add(copyjmi); pastejmi.setText("粘贴"); pastejmi.setMnemonic(KeyEvent.VK_P); pastejmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK)); pastejmi.addActionListener(al); editjm.add(pastejmi); cutjmi.setText("剪切"); cutjmi.setMnemonic(KeyEvent.VK_X); cutjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK)); cutjmi.addActionListener(al); editjm.add(cutjmi); editjm.add(js3); findjmi.setText("查找"); findjmi.setMnemonic(KeyEvent.VK_F); findjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputEvent.CTRL_MASK)); findjmi.addActionListener(al); findnjmi.setText("查找下一个"); findnjmi.addActionListener(al); editjm.add(findjmi); editjm.add(findnjmi); editjm.addSeparator(); deletejmi.setText(" 删除"); deletejmi.setMnemonic(KeyEvent.VK_D); deletejmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_D,InputEvent.CTRL_MASK)); deletejmi.addActionListener(new delete()); selectalljmi.setText("全选"); selectalljmi.setMnemonic(KeyEvent.VK_S); selectalljmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK)); selectalljmi.addActionListener(new selectAllL()); undojmi.setText("撤消"); undojmi.setMnemonic(KeyEvent.VK_U); undojmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_U,InputEvent.CTRL_MASK)); undojmi.addActionListener(al); editjm.add(deletejmi); editjm.add(selectalljmi); editjm.add(undojmi);//编辑菜单设置结束 setjm=new JMenu(); setjm.setText("设置"); setjm.setMnemonic(KeyEvent.VK_S); fjmi=new JMenuItem(); fjmi.setText("字体颜色..."); fjmi.setMnemonic(KeyEvent.VK_F); fjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_M,InputEvent.CTRL_MASK)); fjmi.addActionListener(al); fontjmi=new JMenuItem(); fontjmi.setText("字体样式..."); fontjmi.setMnemonic(KeyEvent.VK_I); fontjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_I,InputEvent.CTRL_MASK)); fontjmi.addActionListener(al); bjmi=new JMenuItem(); bjmi.setText("背景颜色..."); bjmi.setMnemonic(KeyEvent.VK_B); bjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_B,InputEvent.CTRL_MASK)); bjmi.addActionListener(al); setjm.add(fjmi); setjm.add(fontjmi); setjm.add(bjmi); viewjm=new JMenu(); viewjm.setText("视图"); viewjm.setMnemonic(KeyEvent.VK_W); toolsjmi=new JMenuItem(); toolsjmi.setText("工具栏"); toolsjmi.setMnemonic(KeyEvent.VK_T); toolsjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_T,InputEvent.CTRL_MASK)); toolsjmi.addActionListener(al); viewjm.add(toolsjmi); helpjm=new JMenu(); helpjm.setText("帮助"); helpjm.setMnemonic(KeyEvent.VK_H); aboutjmi=new JMenuItem(); aboutjmi.setText("关于"); aboutjmi.setMnemonic(KeyEvent.VK_A); aboutjmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MASK)); aboutjmi.addActionListener(al); helpjm.add(aboutjmi); jmb.add(jm); jmb.add(editjm); jmb.add(setjm); jmb.add(viewjm); jmb.add(helpjm); jtb=new JToolBar(); jtb.setFloatable(false); addButtons(); this.getContentPane().add(jtb,BorderLayout.PAGE_START); definePopupMenu(); } public void definePopupMenu() { JPopupMenu popupjm=new JPopupMenu(); MouseListener ml=new popuplistener(popupjm); JMenuItem jmi=null; jmi=new JMenuItem("新建"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { newactionlistener(); } }); popupjm.add(jmi); popupjm.addSeparator(); jmi=new JMenuItem("打开"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { openactionlistener(); } }); popupjm.add(jmi); jmi=new JMenuItem("保存"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { doSave(fileName); } }); popupjm.add(jmi); jmi=new JMenuItem("另保存"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { doSaveAs(); } }); popupjm.add(jmi); popupjm.addSeparator(); jmi=new JMenuItem("查找"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { new Finder(Mynote.this,jta).show(); } }); popupjm.add(jmi); popupjm.addSeparator(); jmi=new JMenuItem("复制"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.copy(); } }); popupjm.add(jmi); jmi=new JMenuItem("粘贴"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.paste(); } }); popupjm.add(jmi); jmi=new JMenuItem("剪切"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.cut(); } }); popupjm.add(jmi); popupjm.addSeparator(); jmi=new JMenuItem("文字颜色"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Color newColor=JColorChooser.showDialog(Mynote.this,"请选择文字颜色",jta.getForeground()); jta.setForeground(newColor); } }); popupjm.add(jmi); jmi=new JMenuItem("背景颜色"); jmi.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Color newColor=JColorChooser.showDialog(Mynote.this,"请选择背景颜色",jta.getBackground()); jta.setBackground(newColor); } }); popupjm.add(jmi); jta.addMouseListener(ml); } class popuplistener extends MouseAdapter { JPopupMenu popupjm; public popuplistener(JPopupMenu popupjm) { this.popupjm=popupjm; } public void mousePressed(MouseEvent e) { executeTrigger(e); } public void mouseReleased(MouseEvent e) { executeTrigger(e); } public void executeTrigger(MouseEvent e) { if(e.isPopupTrigger()) popupjm.show(e.getComponent(),e.getX(),e.getY()); } } public void addButtons() { JButton jb[]=new JButton[9]; { jb[0]=new JButton(); addListeners(jb[0],quick[0]); jb[0].setToolTipText(quick[0]); jb[0].setIcon(createImage("0.gif")); jtb.add(jb[0]); } {jb[1]=new JButton(); addListeners(jb[1],quick[1]); jb[1].setToolTipText(quick[1]); jb[1].setIcon(createImage("1.gif")); jtb.add(jb[1]); } { jb[2]=new JButton(); addListeners(jb[2],quick[2]); jb[2].setToolTipText(quick[2]); jb[2].setIcon(createImage("2.gif")); jtb.add(jb[2]); } { jb[3]=new JButton(); addListeners(jb[3],quick[3]); jb[3].setToolTipText(quick[3]); jb[3].setIcon(createImage("3.gif")); jtb.add(jb[3]); } { jb[4]=new JButton(); addListeners(jb[4],quick[4]); jb[4].setToolTipText(quick[4]); jb[4].setIcon(createImage("4.gif")); jtb.add(jb[4]); } { jb[5]=new JButton(); addListeners(jb[5],quick[5]); jb[5].setToolTipText(quick[5]); jb[5].setIcon(createImage("5.gif")); jtb.add(jb[5]); } { jb[6]=new JButton(); addListeners(jb[6],quick[6]); jb[6].setToolTipText(quick[6]); jb[6].setIcon(createImage("6.gif")); jtb.add(jb[6]); } { jb[7]=new JButton(); addListeners(jb[7],quick[7]); jb[7].setToolTipText(quick[7]); jb[7].setIcon(createImage("7.gif")); jtb.add(jb[7]); } { jb[8]=new JButton(); addListeners(jb[8],quick[8]); jb[8].setToolTipText(quick[8]); jb[8].setIcon(createImage("8.gif")); jtb.add(jb[8]); } } public void addListeners(JButton jb,String actionCommand) { if(actionCommand.equals(quick[0])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { newactionlistener(); } }); } else if(actionCommand.equals(quick[1])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { openactionlistener(); } }); } else if(actionCommand.equals(quick[2])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { doSave(fileName); } }); } else if(actionCommand.equals(quick[3])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { doSaveAs(); } }); } else if(actionCommand.equals(quick[4])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.copy(); } }); } else if(actionCommand.equals(quick[5])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.paste(); } }); } else if(actionCommand.equals(quick[6])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.cut(); } }); } else if(actionCommand.equals(quick[7])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.cut(); } }); } else if(actionCommand.equals(quick[8])) { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.selectAll(); } }); } else { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.cut(); } }); } } public ImageIcon createImage(String str) { java.net.URL url=Mynote.class.getResource(str); if(url==null) return null; else return new ImageIcon(url); } public static void main(String args[]) { new Mynote().show(); } public void newactionlistener() { if(changed==true) { int n; Object option[]={"YES","NO","CANCEL"}; n=JOptionPane.showOptionDialog(null, "你的文件还没有保存呢，你想现在保存吗？", "保存", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, option, option[0]); switch(n) { case JOptionPane.YES_OPTION: doSave(fileName); //保存文件 fileName=""; //清空文件名 jta.setText(""); //清空编辑区 changed=false; //新建文件后，把更新标志改为false; break; case JOptionPane.NO_OPTION: fileName=""; jta.setText(""); changed=false; break; case JOptionPane.CANCEL_OPTION: break; default: break; } } else { fileName=""; jta.setText(""); } } public void openactionlistener() { FileDialog fd=new FileDialog(Mynote.this,"Open...",FileDialog.LOAD); fd.show(); if(fd.getFile()==null) //如果没有选择文件，则返回 return; fileName=fd.getDirectory()+File.separator+fd.getFile();//取得文件名[包括路径] FileInputStream fis=null; //定义时先初始化 String str1=null; try { fis=new FileInputStream(fileName); int size=fis.available(); byte bytes[]=new byte[size]; fis.read(bytes); // 读取文件 str1=new String(bytes); //建立字符串数组 }catch(IOException e1) {} finally { try { fis.close(); }catch(IOException e2){} } if(str1!=null){jta.setText(str1);} changed=false; } class A implements ActionListener { public void actionPerformed(ActionEvent e) { Object o=e.getSource(); JMenuItem jmi=(JMenuItem)o; if(jmi==newjmi) { newactionlistener(); } else if(jmi==openjmi) { openactionlistener(); } else if(jmi==savejmi) { doSave(fileName); } else if(jmi==saveasjmi) { doSaveAs(); } else if(jmi==exitjmi) { if(changed==true) { int n; Object[] option={"YES","NO"}; n=JOptionPane.showOptionDialog(null, "你的文件还没有保存呢，你想现在保存吗？", "保存", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, option, option[0]); switch(n) { case JOptionPane.YES_OPTION: doSave(fileName); break; case JOptionPane.NO_OPTION: break; default: break; } } System.exit(0); } else if(jmi==copyjmi) { jta.copy(); } else if(jmi==pastejmi) { jta.paste(); } else if(jmi==cutjmi) { jta.cut(); } else if(jmi==findjmi) { new Finder(Mynote.this,jta).show(); } else if(jmi==selectalljmi) { jta.selectAll(); } else if(jmi==deletejmi) { jta.cut(); } else if(jmi==fontjmi) { Color newColor=JColorChooser.showDialog(Mynote.this,"选择字体颜色",jta.getForeground()); if(newColor!=null) jta.setForeground(newColor); } else if(jmi==fjmi) { Color newColor=JColorChooser.showDialog(Mynote.this,"选择字体颜色",jta.getForeground()); if(newColor!=null) jta.setForeground(newColor); } else if(jmi==bjmi) { Color newColor=JColorChooser.showDialog(Mynote.this,"选择背景颜色",jta.getBackground()); if(newColor!=null) jta.setBackground(newColor); } else if(jmi==aboutjmi) { new About(Mynote.this,true); } else; } } public void doSave(String fileName) { if(fileName=="") { doSaveAs(); return; } FileOutputStream fos=null; String str3=jta.getText(); try { fos=new FileOutputStream(fileName); fos.write(str3.getBytes()); }catch(IOException e1){} finally { try {fos.close();}catch(IOException e2){} } changed=false; } public void undo(String fileName) { if(fileName=="") { doSaveAs(); return; } FileOutputStream fos=null; String str3=jta.getText(); try { fos=new FileOutputStream(fileName); fos.write(str3.getBytes()); }catch(IOException e1){} finally { try {fos.close();}catch(IOException e2){} } changed=false; } public void doSaveAs() { FileDialog fd=new FileDialog(Mynote.this,"Save...",FileDialog.SAVE); fd.show(); if(fd.getFile()==null) return; fileName=fd.getDirectory()+File.separator+fd.getFile(); String str4=jta.getText(); FileOutputStream fos=null; try { fos=new FileOutputStream(fileName); fos.write(str4.getBytes()); }catch(IOException e1){} finally { try{fos.close();}catch(IOException e2){} } changed=false; } } class jtaL implements ActionListener { public void actionPerformed(ActionEvent e) { } } class print implements ActionListener { PrinterJob prtMe = PrinterJob.getPrinterJob(); public void actionPerformed(ActionEvent e) { try { prtMe.print(); } catch(Exception ew) { } } } class delete implements ActionListener { JTextArea jta; public void actionPerformed(ActionEvent e) { String selection = jta.getSelectedText(); jta.replaceRange("", jta.getSelectionStart(), jta.getSelectionEnd()); } } class selectAllL implements ActionListener { JTextArea jta; public void actionPerformed(ActionEvent e) { jta.selectAll(); } } class Finder extends JDialog implements ActionListener { JFrame jf; JTextArea jta; JButton findButton,closeButton; JPanel findPane,buttonPane; JLabel findLabel; JTextField jtf; public Finder(JFrame jf,JTextArea jta) { super(jf,true); //JDialog的构造方法。必须是第一句。 super.setTitle("查找"); super.getContentPane().setLayout(new GridBagLayout()); this.jf=jf; this.jta=jta; Composes(); this.setLocationRelativeTo(jf); this.pack(); this.requestFocus(); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { Finder.this.dispose(); } }); } public void Composes() { GridBagConstraints gbag=new GridBagConstraints();//GridBagLayout要和GridBagConstraints一起用才有效果。 gbag.fill=GridBagConstraints.HORIZONTAL; gbag.weightx=1.0; gbag.insets=new Insets(0,5,0,0); findButton=new JButton(); closeButton=new JButton(); findPane=new JPanel(); buttonPane=new JPanel(); findLabel=new JLabel(); jtf=new JTextField(); findPane.setLayout(new GridBagLayout()); findLabel.setText("查找内容"); findLabel.setLabelFor(jtf); findPane.add(findLabel,new GridBagConstraints()); jtf.addActionListener(this); //在文本框里面按回车键。 findPane.add(jtf,gbag); gbag=new GridBagConstraints(); gbag.fill=GridBagConstraints.BOTH; gbag.insets=new Insets(11,12,0,11); this.getContentPane().add(findPane,gbag); buttonPane.setLayout(new GridBagLayout()); findButton.setText("查找"); findButton.setMnemonic(KeyEvent.VK_F); findButton.setToolTipText("查找"); findButton.addActionListener(this); buttonPane.add(findButton,new GridBagConstraints()); closeButton.setText("关闭"); closeButton.setMnemonic(KeyEvent.VK_C); closeButton.setToolTipText("关闭"); closeButton.addActionListener(this); gbag=new GridBagConstraints(); gbag.insets=new Insets(0,5,0,0); buttonPane.add(closeButton,gbag); gbag=new GridBagConstraints(); gbag.gridx=0;gbag.gridy=1; gbag.anchor=GridBagConstraints.SOUTHEAST; gbag.insets=new Insets(17,12,11,11); this.getContentPane().add(buttonPane,gbag); } public void actionPerformed(ActionEvent e) { String textStr=jta.getText(); String findStr=jtf.getText(); if(findStr.equals("")); else { int index=textStr.indexOf(findStr); if(index!=-1)//找到查找的内容 { jta.setCaretPosition(index); } else Toolkit.getDefaultToolkit().beep(); } this.dispose(); } } class About extends JDialog { JFrame jf; JTextField jtf; public About(JFrame jf,boolean b) { super(jf,b); this.jf=jf; Composes(); this.getContentPane().add(jtf,BorderLayout.CENTER); super.setLocationRelativeTo(jf); super.pack(); this.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){About.this.dispose();}}); super.show(); } public void Composes() { jtf=new JTextField(); jtf.setBackground(new Color(0xffffff)); jtf.setEditable(false); jtf.setText("谢谢"); } } -------------------------------- import java.awt.*; import java.awt.event.*; import java.io.*; import java.awt.datatransfer.*; import javax.swing.*; import javax.swing.event.*; import java.awt.color.*; class MyMenuBar extends MenuBar { public MyMenuBar(Frame parent) { parent.setMenuBar(this); } public void addMenus(String[] menus) { for (int i = 0; i < menus.length; i++) add(new Menu(menus[i])); } public void addMenuItems(int menuNumber, String[] items) { for (int i = 0; i < items.length; i++) { if (items[i] != null) getMenu(menuNumber).add(new MenuItem(items[i])); else getMenu(menuNumber).addSeparator(); } } public void addActionListener(ActionListener al) { for (int i = 0; i < getMenuCount(); i++) for (int j = 0; j < getMenu(i).getItemCount(); j++) getMenu(i).getItem(j).addActionListener(al); } } class MyFile { private FileDialog fd; public MyFile(Frame parent) { fd = new FileDialog(parent, "", FileDialog.LOAD); } private String getPath() { return fd.getDirectory() + "//" + fd.getFile(); } public String getData() throws IOException { fd.setTitle("打开"); fd.setMode(FileDialog.LOAD); fd.setVisible(true); BufferedReader br = new BufferedReader(new FileReader(getPath())); StringBuffer sb = new StringBuffer(); String aline; while ((aline = br.readLine()) != null) sb.append(aline + '/n'); br.close(); return sb.toString(); } public void setData(String data) throws IOException { fd.setTitle("保存"); fd.setMode(FileDialog.SAVE); fd.setVisible(true); BufferedWriter bw = new BufferedWriter(new FileWriter(getPath())); StringBuffer sb = new StringBuffer(); bw.write(data); bw.close(); } } class MyClipboard { private Clipboard cb; public MyClipboard() { cb = Toolkit.getDefaultToolkit().getSystemClipboard(); } public void setData(String data) { cb.setContents(new StringSelection(data), null); } public String getData() { Transferable content = cb.getContents(null); try { return (String) content.getTransferData(DataFlavor.stringFlavor); } catch (Exception ue) { } return null; } } class MyFindDialog extends Dialog implements ActionListener { private Label l1 = new Label("查找字符串"); private Label l2 = new Label("替换字符串"); private TextField tf1 = new TextField(10); private TextField tf2 = new TextField(10); private Button b1 = new Button("查找"); private Button b2 = new Button("替换"); private TextArea ta; public MyFindDialog(Frame owner, TextArea ta) { super(owner, "查找", false); this.ta = ta; setLayout(null); l1.setBounds(10, 30, 80, 20); l2.setBounds(10, 70, 80, 20); tf1.setBounds(90, 30, 90, 20); tf2.setBounds(90, 70, 80, 20); b1.setBounds(190, 30, 80, 20); b2.setBounds(190, 70, 80, 20); add(l1); add(l2); add(tf1); add(tf2); add(b1); add(b2); setResizable(false); b1.addActionListener(this); b2.addActionListener(this); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } public void showFind() { setTitle("查找"); setSize(280, 60); setVisible(true); } public void showReplace() { setTitle("查找替换"); setSize(280, 110); setVisible(true); } private void find() { String text = ta.getText(); String str = tf1.getText(); int end = text.length(); int len = str.length(); int start = ta.getSelectionEnd(); if (start == end) start = 0; for (; start <= end - len; start++) { if (text.substring(start, start + len).equals(str)) { ta.setSelectionStart(start); ta.setSelectionEnd(start + len); return; } } ta.setSelectionStart(end); ta.setSelectionEnd(end); } private void replace() { String str = tf2.getText(); if (ta.getSelectedText().equals(tf1.getText())) ta.replaceRange(str, ta.getSelectionStart(), ta.getSelectionEnd()); else find(); } public void actionPerformed(ActionEvent e) { if (e.getSource() == b1) find(); else if (e.getSource() == b2) replace(); } } public class MyMemo extends Frame implements ActionListener { private TextArea editor = new TextArea(); private MyFile mf = new MyFile(this); private MyClipboard cb = new MyClipboard(); private MyFindDialog fd = new MyFindDialog(this, editor); public MyMemo(String title) { super(title); MyMenuBar mb = new MyMenuBar(this); mb.addMenus(new String[] { "文件", "编辑", "格式", "查找", "帮助" }); mb.addMenuItems(0, new String[] { "新建", "打开", "保存", null, "退出" }); mb.addMenuItems(1, new String[] { "剪切", "复制", "粘贴", "删除", null, "全选" }); mb.addMenuItems(2, new String[] { "字体", null, "颜色" }); mb.addMenuItems(3, new String[] { "查找", null, "替换" }); mb.addMenuItems(4, new String[] { "帮助主题", null, "关于记事本" }); add(editor); mb.addActionListener(this); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } public void actionPerformed(ActionEvent e) { String selected = e.getActionCommand(); if (selected.equals("新建")) editor.setText(""); else if (selected.equals("打开")) { try { editor.setText(mf.getData()); } catch (IOException ie) { } } else if (selected.equals("保存")) { try { mf.setData(editor.getText()); } catch (IOException ie) { } } else if (selected.equals("退出")) { dispose(); } else if (selected.equals("剪切")) { cb.setData(editor.getSelectedText()); editor.replaceRange("", editor.getSelectionStart(), editor .getSelectionEnd()); } else if (selected.equals("复制")) { cb.setData(editor.getSelectedText()); } else if (selected.equals("粘贴")) { String str = cb.getData(); editor.replaceRange(str, editor.getSelectionStart(), editor .getSelectionEnd()); } else if (selected.equals("删除")) { editor.replaceRange("", editor.getSelectionStart(), editor .getSelectionEnd()); } else if (selected.equals("全选")) { editor.setSelectionStart(0); editor.setSelectionEnd(editor.getText().length()); } else if (selected.equals("查找")) { fd.showFind(); } else if (selected.equals("查找替换")) { fd.showReplace(); } } public static void main(String[] args) { MyMemo memo = new MyMemo("我的记事本"); memo.setSize(650, 450); memo.setVisible(true); } } 请问如何在这个程序里面的“格式”下添加设置字体“颜色”和“大小”的代码！！！急急急~~~ 请大师们帮帮忙。。。。。谢谢问题点数：20 回复次数：2 显示所有回复显示星级回复显示楼主回复修改删除举报引用回复加为好友发送私信在线聊天 kao331431214 o(>_<)o 小明（修炼中）等级: 可用分等级：中农总技术分：4368 总技术分排名：5144 发表于：2008-12-27 15:52:401楼得分:0 汗 -_-! 你参考一下吧 Java code import java.awt.*; import java.awt.event.*; import java.lang.String.*; import java.awt.datatransfer.*;//数据传送 import java.util.*; public class Notepad {public static void main(String args[]) {MyMenuFrame mf=new MyMenuFrame();//定义主类 mf.setSize(new Dimension(300,200));//用setSize()方法指定窗口的初始大小 mf.setVisible(true); } } class MyMenuFrame extends Frame implements ActionListener//定义窗口 { Clipboard clipboard;//定义剪切板对象 FileDialog filedialog_save,filedialog_load;//定义文件对话框 MenuBar m_MenuBar;//定义菜单条 Menu menuFile,menuEdit,menuStyle,menuSearch,menuHelp;//定义菜单项 MenuItem mi_File_New,mi_File_Open,mi_File_Save,mi_file_Savaas,mi_File_Close,mi_File_Exit, mi_Edit_Ce,mi_Edit_Copy,mi_Edit_Cut,mi_Edit_Paste, mi_Edit_Style,mi_Style_Font,mi_Style_Auto, mi_Search_sphere, mi_Help_Helptopic,mi_Help_About; TextArea text; MyMenuFrame( )//构造方法 { super("记事本");//指定窗口标题 text=new TextArea(20,20); add(text); clipboard = null; clipboard = getToolkit().getSystemClipboard();//获取系统剪切板 filedialog_save=new FileDialog(this,"保存文件对话框",FileDialog.SAVE); filedialog_save.setVisible(false); filedialog_load=new FileDialog(this,"打开文件对话框",FileDialog.LOAD); filedialog_load.setVisible(false); m_MenuBar=new MenuBar( ); menuFile=new Menu("文件");//创建菜单项，创建菜单子项并初始化 MenuItem mi_File_New=new MenuItem("新建"); MenuItem mi_File_Open=new MenuItem("打开"); MenuItem mi_File_Save=new MenuItem("保存"); MenuItem mi_File_Saveas=new MenuItem("另存为"); MenuItem mi_File_Close=new MenuItem("关闭"); MenuItem mi_File_Exit=new MenuItem(" 退出"); mi_File_Exit.setShortcut(new MenuShortcut(′x′));//设置快捷键 mi_File_Open.setActionCommand("打开");//简化 mi_File_New.setActionCommand("新建"); mi_File_Exit.setActionCommand("退出"); mi_File_New.addActionListener(this);//使菜单子项响应动作事件 mi_File_Open.addActionListener(this); mi_File_Save.addActionListener(this); mi_File_Saveas.addActionListener(this); mi_File_Close.addActionListener(this); mi_File_Exit.addActionListener(this); menuFile.add(mi_File_New);//把菜单子项加入菜单项 menuFile.add(mi_File_Open); menuFile.add(mi_File_Save); menuFile.add(mi_File_Saveas); menuFile.add(mi_File_Close); menuFile.addSeparator();//加一条横向分割线 menuFile.add(mi_File_Exit); m_MenuBar.add(menuFile);//把菜单项加入菜单条 menuEdit=new Menu("编辑"); mi_Edit_Ce=new MenuItem("撤消"); mi_Edit_Copy=new MenuItem("复制"); mi_Edit_Cut=new MenuItem("剪切"); mi_Edit_Paste=new MenuItem("粘贴"); mi_Edit_Copy.setActionCommand("复制"); mi_Edit_Cut.setActionCommand("剪切"); mi_Edit_Paste.setActionCommand("粘贴"); mi_Edit_Ce.addActionListener(this); mi_Edit_Copy.addActionListener(this); mi_Edit_Cut.addActionListener(this); mi_Edit_Paste.addActionListener(this); menuEdit.add(mi_Edit_Ce); menuEdit.add(mi_Edit_Copy); menuEdit.add(mi_Edit_Cut); menuEdit.add(mi_Edit_Paste); m_MenuBar.add(menuEdit); menuStyle=new Menu("格式"); mi_Style_Auto=new MenuItem("自动换行"); mi_Style_Font=new MenuItem("字体"); mi_Style_Auto.addActionListener(this); mi_Style_Font.addActionListener(this); menuStyle.add(mi_Style_Auto); menuStyle.add(mi_Style_Font); m_MenuBar.add(menuStyle); menuSearch=new Menu("查看"); mi_Search_sphere=new MenuItem("状态栏"); mi_Search_sphere.addActionListener(this); menuSearch.add(mi_Search_sphere); m_MenuBar.add(menuSearch); menuHelp=new Menu("帮助"); mi_Help_Helptopic=new MenuItem("帮助主题"); mi_Help_About=new MenuItem("关于记事本"); mi_Help_Helptopic.addActionListener(this); mi_Help_About.addActionListener(this); menuHelp.add(mi_Help_Helptopic); menuHelp.add(mi_Help_About); m_MenuBar.add(menuHelp); setMenuBar(m_MenuBar);//把菜单条加入到菜单 addWindowListener(new WindowAdapter()//监听窗口（关闭窗口） { public void windowClosing(WindowEvent e) { System.exit(0); } } ); setVisible(true); validate(); //如果加载了其他东西，就可用它来显示组件 } public void actionPerformed(ActionEvent e) { if(e.getActionCommand()=="新建") { text.setText(null);//清空 } if(e.getActionCommand()=="打开") { filedialog_load.setVisible(true);//使文件对话框可见 } if(e.getActionCommand()=="保存") { filedialog_save.setVisible(true);//使文件对话框可见 } if(e.getActionCommand() == "复制") { String s = text.getSelectedText();//复制到剪切板 StringSelection text1= new StringSelection(s);//拖动鼠标选取文本 clipboard.setContents(text1, null); } if(e.getActionCommand() == "剪切") { String s1 = text.getSelectedText();//剪切到剪切板 StringSelection text1 = new StringSelection(s1);//拖动鼠标选取文本 clipboard.setContents(text1, null); int j = text.getSelectionStart(); int k = text.getSelectionEnd(); text.replaceRange("", j, k);//从Text中删除被选取文本 } if(e.getActionCommand() =="粘贴")//从剪切板粘贴数据 { Transferable transferable = clipboard.getContents(this); DataFlavor dataflavor = DataFlavor.stringFlavor; if(transferable.isDataFlavorSupported(dataflavor)) { try//处理异常事件的发生（类型不符合） { String s3 = (String)transferable.getTransferData(dataflavor); text.insert(s3, text.getCaretPosition()); } catch(Exception e1) { } } } if(e.getActionCommand()=="退出") { dispose(); System.exit(0); } } }

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