记事本(Java编写)

1、package notepad;public class JNotepad extends JFrame implements Runnable, ActionListener, MouseListener, CaretListenerprivate static final long serialVersionUID = 1L;private JPanel jContentPane, jStatusPanel;private JScrollPane jScrollNotepadPane;private JMenuBar jMenuBar;private JMenu jMenuFile, jM

2、enuEdit, jMenuFormat, jMenuList;private JMenuItem jMenuNew, jMenuOpen, jMenuSave, jMenuAsSave, jMenuExit, jMenuFont;private JMenuItem jMenuCut, jMenuCopy, jMenuPaste, jMenuSelectAll, jMenuFind, jMenuDate;private JCheckBoxMenuItem jMenuWrap;private JRadioButtonMenuItem jRadioItem;private ButtonGroup

3、group = new ButtonGroup(;private JLabel jLabelFile, jLabelDate, jLabelLines;private JTextArea jNotepad;private JFileChooser fileChooser;private File fileInfo;private Find findText;private SetFont fontText;private StringBuilder sbTitle = new StringBuilder("无 标 题 - 记 事 本 "private StringBuild

4、er sbText = new StringBuilder(;private JMenuBar getJMainBar(if (jMenuBar = nulljMenuBar = new JMenuBar(;jMenuBar.add(getJMenuFile(;jMenuBar.add(getJMenuEdit(;jMenuBar.add(getJMenuFormat(;jMenuList = new JMenu("最近访问的文件 (L"jMenuList.setMnemonic('L'jMenuBar.add(jMenuList;return jMenuB

5、ar;SuppressWarnings("deprecation"private JMenu getJMenuFile(if (jMenuFile = nulljMenuFile = new JMenu("文件 (F"jMenuFile.setMnemonic('F'jMenuNew = new JMenuItem("新建 (N"jMenuNew.setMnemonic('N'jMenuFile.add(jMenuNew.addActionListener(this; jMenuOpen = new J

6、MenuItem("打开 (O"jMenuOpen.setMnemonic('O'jMenuFile.add(jMenuOpen.addActionListener(this; jMenuSave = new JMenuItem("保存 (S"jMenuSave.setMnemonic('S'jMenuSave.setEnabled(false;jMenuFile.add(jMenuSave.addActionListener(this; jMenuAsSave = new JMenuItem("另存为 (A&q

7、uot; jMenuAsSave.setMnemonic('A'jMenuFile.add(jMenuAsSave.addActionListener(this; jMenuFile.addSeparator(;jMenuExit = new JMenuItem("退出 (X"jMenuExit.setMnemonic('X'jMenuFile.add(jMenuExit.addActionListener(this; return jMenuFile;private JMenu getJMenuEdit(if (jMenuEdit = nu

8、lljMenuEdit = new JMenu("编辑 (E"jMenuEdit.setMnemonic('E'jMenuCut = new JMenuItem("剪切 (T"jMenuCut.setMnemonic('T'jMenuEdit.add(jMenuCut.addActionListener(this; jMenuCopy = new JMenuItem("复制 (C"jMenuCopy.setMnemonic('C'jMenuEdit.add(jMenuCopy.addAc

9、tionListener(this; jMenuPaste = new JMenuItem("粘贴 (P"jMenuPaste.setMnemonic('P'jMenuSelectAll = new JMenuItem("全选 (A"jMenuSelectAll.setMnemonic('A'jMenuEdit.add(jMenuSelectAll.addActionListener(this;jMenuEdit.addSeparator(;jMenuFind = new JMenuItem("查找 /替换 (F

10、"jMenuFind.setMnemonic('F'jMenuEdit.add(jMenuFind.addActionListener(this;jMenuEdit.addSeparator(;jMenuDate = new JMenuItem("时间 /日期 (D"jMenuDate.setMnemonic('D'jMenuEdit.add(jMenuDate.addActionListener(this;return jMenuEdit;private JMenu getJMenuFormat(if (jMenuFormat =

11、 nulljMenuFormat = new JMenu("格式 (O"jMenuFormat.setMnemonic('O'jMenuWrap = new JCheckBoxMenuItem("自动换行 (W", true; / jMenuWrap.setState(true;jMenuWrap.setMnemonic('W'jMenuFormat.add(jMenuWrap.addActionListener(this;jMenuFont = new JMenuItem("字体 (F"jMenuFo

12、nt.setMnemonic('F'jMenuFormat.add(jMenuFont.addActionListener(this;return jMenuFormat;private JPanel getJStatusPanel(if (jStatusPanel = nulljLabelFile = new JLabel(" "jLabelDate = new JLabel(" "jLabelLines = new JLabel("总行数 1"GridLayout gridLayout = new GridLayo

13、ut(;gridLayout.setRows(1;jStatusPanel = new JPanel(;jStatusPanel.setLayout(gridLayout;jStatusPanel.add(jLabelDate, null;jStatusPanel.add(jLabelLines, null;return jStatusPanel;private JScrollPane getJScrollNotepadPane(if (jScrollNotepadPane = nulljScrollNotepadPane = new JScrollPane(;jNotepad = new J

14、TextArea(;jNotepad.setLineWrap(true; / 设置自动换行 jNotepad.setWrapStyleWord(true;jNotepad.addCaretListener(this;jScrollNotepadPane.setViewportView(jNotepad; return jScrollNotepadPane;public static void main(String argsJNotepad notepad = new JNotepad(;Thread thread = new Thread(notepad;thread.run(;thread

15、.start(;public JNotepad(this.setJMenuBar(getJMainBar(;this.setContentPane(getJContentPane(;this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE; this.setBounds(100,100, 800, 560;this.setVisible(true;this.addWindowListener(new WindowAdapter( public void windowClosing(WindowEvent e toFileList(false;toFi

16、leList(true;fileChooser = new JFileChooser(; / 创建文件对话框的对象 fileChooser.setSize(400, 300;private JPanel getJContentPane(if (jContentPane = nulljContentPane = new JPanel(;jContentPane.setLayout(new BorderLayout(;jContentPane.add(getJStatusPanel(, BorderLayout.SOUTH; jContentPane.add(getJScrollNotepadPa

17、ne(, BorderLayout.CENTER; return jContentPane;/* 读取或写入最近访问的文件的路径。* param flag:True 表示读取, False 表示写入。*/private void toFileList(boolean flagFile fileList = new File("notepadFileList.txt"tryif(flagif(fileList.exists(String line = null; / null 不能替换为 "" 。FileReader fr = new FileReader

18、(fileList;BufferedReader br = new BufferedReader(fr;while(line = br.readLine( != nulljRadioItem = new JRadioButtonMenuItem(line; group.add(jRadioItem;jMenuList.add(jRadioItem.addMouseListener(this; br.close(;fr.close(;elseif(!fileList.exists(fileList.createNewFile(;FileWriter fw = new FileWriter(fil

19、eList;BufferedWriter bw = new BufferedWriter(fw;for(Component item : jMenuList.getMenuComponents( bw.write(JRadioButtonMenuItemitem.getText(; bw.newLine(;bw.close(;fw.close(;catch(IOException ieie.printStackTrace(;/* 读取选定文件的内容。* param file:选定的文件的对象。*/private void toFileReader(File filetryFileReader

20、fr = new FileReader(fileInfo = file;BufferedReader br = new BufferedReader(fr;jNotepad.read(br, null; / 读取所有字符。br.close(;fr.close(;sbTitle.delete(0, sbTitle.length(;sbTitle.append(fileInfo.getName(;sbTitle.append(" "this.setTitle(null;jMenuSave.setEnabled(true;jNotepad.setCaretPosition(1;

21、/ 更新总行数。catch(IOException ieie.printStackTrace(;/* 写入当前文本的内容。* param file:选定的文件的对象。*/private void toFileWriter(File filetryFileWriter fw = new FileWriter(file;BufferedWriter bw = new BufferedWriter(fw;jNotepad.write(bw; / 逐行写入。bw.close(;fw.close(;catch(IOException ieie.printStackTrace(;public void r

22、un(while(truetryif (this.getTitle(.length( < sbTitle.length(this.setTitle(sbTitle.substring(0, this.getTitle(.length( + 1;elsesbTitle.append(sbTitle.charAt(0;this.setTitle(sbTitle.deleteCharAt(0.toString(;jLabelDate.setText(String.format("%1$tA %1$tB %1$td %1$tY, %1$tp %1$tl:%1$tM:%1$tS"

23、;, new Date(;if(fileInfo != null && fileInfo.exists(sbText.append("文件属性:"if (!fileInfo.canWrite( && fileInfo.isHidden(sbText.append("只读,隐藏 "else if (!fileInfo.canWrite(sbText.append("只读 "else if (fileInfo.isHidden(sbText.append("隐藏 "elsesbText.

24、append("正常 "elsesbText.append("文件不存在 "jLabelFile.setText(sbText.toString(;sbText.delete(0, sbText.length(;Thread.sleep(200;catch (InterruptedException ee.printStackTrace(;public void actionPerformed(ActionEvent eif (e.getSource(.equals(jMenuExitSystem.exit(0;else if (e.getSource(

25、.equals(jMenuNewif(JOptionPane.showConfirmDialog(this, " 当前文本内容以改变,是否新建? ", " 记事本 ", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE = 0sbTitle.delete(0, sbTitle.length(;sbTitle.append("无标题 - 记事本 "this.setTitle(null;else if (e.getSource(.equals(jMenuOpenif(fileC

26、hooser.showOpenDialog(this = JFileChooser.APPROVE_OPTIONtoFileReader(fileChooser.getSelectedFile(;jRadioItem = new JRadioButtonMenuItem(fileInfo.getPath(;group.add(jRadioItem;jMenuList.add(jRadioItem.addMouseListener(this;else if(e.getSource(.equals(jMenuSaveif(fileInfo.canWrite( / 文件属性是否为只读toFileWr

27、iter(fileInfo;elseJOptionPane.showMessageDialog(this, String.format("文件“ %s”的属性为 只读,请先更改其属性。 ", fileInfo.getPath(;else if(e.getSource(.equals(jMenuAsSaveif(fileChooser.showSaveDialog(this = JFileChooser.APPROVE_OPTIONFile file = fileChooser.getSelectedFile(;if(file.exists(if(JOptionPane.sh

28、owConfirmDialog(this, String.format("文件“ %s”已存 在 , 要 替 换 它 吗 ? ", file.getPath(, " 记 事 本 ", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE = 1return;if(!file.canWrite(JOptionPane.showMessageDialog(this, String.format("文件“ %s” 的属性为只读,请先更改其属性。 ", file.getPath(;re

29、turn;toFileWriter(file;else if(e.getSource(.equals(jMenuFindif(findText = nullfindText = new Find(this, jNotepad;findText.setVisible(true;else if(e.getSource(.equals(jMenuFontif(fontText = nullfontText = new SetFont(this, jNotepad;fontText.setVisible(true;else if(e.getSource(.equals(jMenuCutjNotepad

30、.cut(;else if(e.getSource(.equals(jMenuCopyjNotepad.copy(;else if(e.getSource(.equals(jMenuPastejNotepad.paste(;else if(e.getSource(.equals(jMenuSelectAlljNotepad.selectAll(;else if(e.getSource(.equals(jMenuDatejNotepad.insert(String.format("%1$tF %1$tT", new Date(, jNotepad.getSelectionSt

31、art(;else if(e.getSource(.equals(jMenuWrapjNotepad.setLineWrap(!jNotepad.getLineWrap(; / 自动换行public void mouseReleased(MouseEvent e / 处理鼠标释放事件JRadioButtonMenuItem item = (JRadioButtonMenuIteme.getSource(;switch(e.getButton( / 鼠标右键。case 1:File file = new File(item.getText(;if(file.exists(toFileReader

32、(file;elseJOptionPane.showMessageDialog(this, String.format("文件“ %s”不存 在! ", item.getText(;break;case 3:if(JOptionPane.showConfirmDialog(this, String.format("确实要删除“ %s” 吗 ? ", item.getText(, " 记 事 本 ", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE = 0jMenuList

33、.remove(item;break;default:break;public void mouseClicked(MouseEvent epublic void mouseEntered(MouseEvent epublic void mouseExited(MouseEvent epublic void mousePressed(MouseEvent epublic void caretUpdate(CaretEvent ejLabelLines.setText(String.format("总行数 %d", jNotepad.getLineCount(; packag

34、e notepad;public class Find implements ActionListenerprivate static final long serialVersionUID = 1L;private JLabel jLabelFind, jLabelReplace;private JTextField jTextFind, jTextReplace;private JButton jBtnFind, jBtnReplace, jBtnReplaceAll, jBtnCancel; private JCheckBox jUpperOrLower;private JRadioBu

35、tton jRadioUp, jRadioDn;private JTextArea jNotepad;private JDialog findDialog;private int startIndex = -1;public Find(JNotepad owner, JTextArea jTextjNotepad = jText;jLabelFind = new JLabel("查找:"jLabelFind.setBounds(16, 22, 42, 22;jLabelReplace = new JLabel("替换:"jLabelReplace.set

36、Bounds(16, 52, 42, 22;jTextFind = new JTextField(;jTextFind.setBounds(60, 22, 180, 22;jTextReplace = new JTextField(;jTextReplace.setBounds(60, 52, 180, 22;jBtnFind = new JButton("查找 (F"jBtnFind.setMnemonic('F'jBtnFind.setBounds(250, 22, 102, 22;jBtnFind.addActionListener(this;jBtn

37、Replace = new JButton("替换 (R"jBtnReplace.setMnemonic('R'jBtnReplace.setBounds(250, 52, 102, 22;jBtnReplace.addActionListener(this;jBtnReplaceAll = new JButton("全部替换 (A"jBtnReplaceAll.setMnemonic('A'jBtnReplaceAll.setBounds(250, 82, 102, 22;jBtnReplaceAll.addAction

38、Listener(this;jBtnCancel = new JButton("取消 (X"jBtnCancel.setMnemonic('X'jBtnCancel.setBounds(250, 112, 102, 22;jBtnCancel.addActionListener(this;jUpperOrLower = new JCheckBox("区分大小写 (C", false; jUpperOrLower.setMnemonic('C'jUpperOrLower.setBounds(14, 100, 106, 22;

39、jRadioUp = new JRadioButton("向上 ", false;jRadioDn = new JRadioButton("向下 ", true;jRadioDn.setBounds(184, 100, 52, 22;ButtonGroup group = new ButtonGroup(;group.add(jRadioUp;group.add(jRadioDn;findDialog = new JDialog(owner, "查找 /替换 " Container findPane = findDialog.getC

40、ontentPane(; findPane.setLayout(null;findPane.add(jLabelFind, null;findPane.add(jLabelReplace, null;findPane.add(jTextFind, null;findPane.add(jTextReplace, null;findPane.add(jBtnFind, null;findPane.add(jBtnReplace, null;findPane.add(jBtnReplaceAll, null;findPane.add(jBtnCancel, null;findPane.add(jUp

41、perOrLower, null;findPane.add(jRadioUp, null;findPane.add(jRadioDn, null;findDialog.setBounds(400, 200, 372, 188;findDialog.setModal(false; / 无模式findDialog.setResizable(false; / 固定窗体大小 findDialog.addWindowListener(new WindowAdapter( public void windowClosing(WindowEvent e jTextReplace.setText(null;j

42、TextFind.setText(null;jTextFind.requestFocusInWindow(;public void setVisible(boolean flagjTextFind.requestFocusInWindow(;findDialog.setVisible(flag;public void actionPerformed(ActionEvent eif(e.getSource(.equals(jBtnFindif(jRadioDn.isSelected(if(jUpperOrLower.isSelected(startIndex = jNotepad.getText

43、(.indexOf(jTextFind.getText(, jNotepad.getSelectionEnd(;elsestartIndex = jNotepad.getText(.toLowerCase(.indexOf(jTextFind.getText(.toLowerCase(, jNotepad.getSelectionEnd(;elsetryif(jUpperOrLower.isSelected(startIndex = jNotepad.getText(0, jNotepad.getSelectionStart(.lastIndexOf(jTextFind.getText(;el

44、sestartIndex = jNotepad.getText(0, jNotepad.getSelectionStart(.toLowerCase(.lastIndexOf(jTextFind.getText(.toLowerCase(; catch(BadLocationException seif(startIndex > -1jNotepad.select(startIndex, startIndex + jTextFind.getText(.length(;elseJOptionPane.showMessageDialog(findDialog, String.format(&

45、quot;找不到 “ %s” 已 完成对文档的搜索。 ", jTextFind.getText(, "记事本 ", 1;jTextReplace.setText(null;jTextFind.requestFocusInWindow(;jTextFind.selectAll(;else if(e.getSource(.equals(jBtnReplacejNotepad.replaceSelection(jTextReplace.getText(;jNotepad.select(jNotepad.getSelectionStart( - jTextReplace.

46、getText(.length(, jNotepad.getSelectionStart(;else if(e.getSource(.equals(jBtnReplaceAlljNotepad.setSelectionStart(0;while(jNotepad.getSelectionStart( < jNotepad.getText(.length(if(jUpperOrLower.isSelected(startIndex = jNotepad.getText(.indexOf(jTextFind.getText(, jNotepad.getSelectionStart(;else

47、startIndex = jNotepad.getText(.toLowerCase(.indexOf(jTextFind.getText(.toLowerCase(, jNotepad.getSelectionStart(;if(startIndex > -1jNotepad.select(startIndex, startIndex + jTextFind.getText(.length(; jNotepad.replaceSelection(jTextReplace.getText(;elsebreak;elsejTextReplace.setText(null;jTextFind

48、.setText(null;jTextFind.requestFocusInWindow(;findDialog.setVisible(false;package notepad;public class SetFont implements ActionListener, ListSelectionListener private static final long serialVersionUID = 1L;private JScrollPane jScrollName, jScrollSize;private JLabel jLabelName, jLabelStyle, jLabelS

49、ize;private JTextField jTextName, jTextStyle, jTextSize;private JList jListName, jListStyle, jListSize;private JButton jButtonOK, jButtonCancel, jButtonColor; private JTextArea jNotepad;private JDialog fontDialog;public SetFont(JNotepad owner, JTextArea jTextjNotepad = jText;jLabelName = new JLabel(

50、"字体名称 "jLabelName.setBounds(80, 16, 64, 20;jLabelStyle = new JLabel("字体类型 "jLabelStyle.setBounds(206, 16, 64, 20;jLabelSize = new JLabel("字体大小 "jLabelSize.setBounds(280, 16, 64, 20;jTextName = new JTextField(;jTextName.setBounds(16, 40, 180, 20;jTextStyle = new JTextFie

51、ld(;jTextStyle.setBounds(206, 40, 64, 20;jTextSize = new JTextField(;jTextSize.setBounds(280, 40, 64, 20;jButtonColor = new JButton("颜色 "jButtonColor.setBounds(28, 197, 75, 23;jButtonColor.addActionListener(this;jButtonOK = new JButton("确定 "jButtonOK.setBounds(150, 197, 75, 23;jB

52、uttonOK.addActionListener(this;jButtonCancel = new JButton("取消 "jButtonCancel.setBounds(256, 197, 75, 23;jButtonCancel.addActionListener(this;fontDialog = new JDialog(owner, "字体 "Container fontPane = fontDialog.getContentPane(;fontPane.setLayout(null;fontPane.add(jLabelName, null

53、;fontPane.add(jLabelStyle, null;fontPane.add(jLabelSize, null;fontPane.add(jTextName, null;fontPane.add(jTextStyle, null;fontPane.add(jTextSize, null;fontPane.add(getJScrollName(, null;fontPane.add(getJListStyle(, null;fontPane.add(getJScrollSize(, null;fontPane.add(jButtonColor, null;fontPane.add(j

54、ButtonOK, null;fontPane.add(jButtonCancel, null;fontDialog.setBounds(400, 200, 367,276;fontDialog.setModal(false; / 无模式fontDialog.setResizable(false; / 固定窗体大小fontDialog.addWindowListener(new WindowAdapter(public void windowClosing(WindowEvent ejTextName.setText(jListName.getSelectedValue(.toString(;

55、 jTextStyle.setText(jListStyle.getSelectedValue(.toString(; jTextSize.setText(jListSize.getSelectedValue(.toString(; ;public void setVisible(boolean flagfontDialog.setVisible(flag;private JScrollPane getJScrollName(if (jScrollName = nullString fontName = "宋体 "," 新宋体 "," 宋体 -

56、方正超大字符集 "," 仿宋 _GB2312","楷体 _GB2312"," 隶书 "," 黑体 "," 华文行楷 "," 华文彩云 "," 华文新魏 "," 华 文仿宋 "," 华文中宋 "," 华 文 细 黑 "," 方 正 舒 体 "," 方 正 姚 体 "," 幼 圆 ","Arial","Arial Black","Dialog","Times New Roman"jListName = new JList(fontName;jListName.addListSelectionListener(this;jListName.setSelectedIndex(0;jScrollName = new JScrollPane(;jScr