Java做的记事本带标准工具栏

//JNotepadTest.java import java.awt.*; import java.awt.event.*; import java.awt.print.*; import java.awt.datatransfer.*; import java.io.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.text.*; public class JNotepadTest extends JPanel { //变量定义 JTextArea jta = new JTextArea("", 24, 40); JScrollPane jsp = new JScrollPane(jta); //菜单条 JMenuBar jmb = new JMenuBar(); JMenu file = new JMenu("文件"); JMenu edit = new JMenu("编辑"); JMenu format = new JMenu("格式"); JMenu help = new JMenu("帮助"); //工具条 JToolBar toolBar = new JToolBar(); //菜单内容 JMenuItem jmi; //实例化剪切板 Clipboard clipbd = getToolkit().getSystemClipboard(); //打印功能 PrinterJob prtMe = PrinterJob.getPrinterJob(); String text = ""; //构造函数 public JNotepadTest() { class newL implements ActionListener { public void actionPerformed(ActionEvent e) { jta.setDocument(new PlainDocument()); } } //打开功能 class openL implements ActionListener { public void actionPerformed(ActionEvent e) { JFileChooser fc = new JFileChooser(); int returnVal = fc.showDialog(JNotepadTest.this, "打开"); if(returnVal == JFileChooser.APPROVE_OPTION) { String file = fc.getSelectedFile().getPath(); if(file == null) { return; } //读取文件 try { Reader in = new FileReader(file); char[] buff = new char[4096]; int nch; while((nch = in.read(buff, 0, buff.length)) != -1) { jta.setDocument(new PlainDocument()); jta.append(new String(buff, 0, nch)); } } catch (IOException io) { System.err.println("IOException: " + io.getMessage()); } } else { return; } } } //保存文件 class saveL implements ActionListener { public void actionPerformed(ActionEvent e) { JFileChooser fc = new JFileChooser(); int returnVal = fc.showSaveDialog(JNotepadTest.this); if(returnVal == JFileChooser.APPROVE_OPTION) { String savefile = fc.getSelectedFile().getPath(); if(savefile == null) { return; } else { String docToSave = jta.getText(); if(docToSave != null) { FileOutputStream fstrm = null; BufferedOutputStream ostrm = null; try { fstrm = new FileOutputStream(savefile); ostrm = new BufferedOutputStream(fstrm); byte[] bytes = null; try { bytes = docToSave.getBytes(); } catch(Exception e1) { e1.printStackTrace(); } ostrm.write(bytes); } catch(IOException io) { System.err.println("IOException: " + io.getMessage()); } finally { try { ostrm.flush(); fstrm.close(); ostrm.close(); } catch(IOException ioe) { System.err.println("IOException: " + ioe.getMessage()); } } } } } else { return; } } } //页面设置 class pageSetupL implements ActionListener { public void actionPerformed(ActionEvent e) { prtMe.printDialog(); } } //打印 class printL implements ActionListener { public void actionPerformed(ActionEvent e) { try { prtMe.print(); } catch(Exception ew) { } } } //退出 class exitL implements ActionListener { public void actionPerformed(ActionEvent e) { System.exit(0); } } //复制 class copyL implements ActionListener { public void actionPerformed(ActionEvent e) { String selection = jta.getSelectedText(); StringSelection clipString = new StringSelection(selection); clipbd.setContents(clipString, clipString); } } //剪切 class cutL implements ActionListener { public void actionPerformed(ActionEvent e) { String selection = jta.getSelectedText(); StringSelection clipString = new StringSelection(selection); clipbd.setContents(clipString, clipString); jta.replaceRange("", jta.getSelectionStart(), jta.getSelectionEnd()); } } //粘贴 class pasteL implements ActionListener { public void actionPerformed(ActionEvent e) { Transferable clipData = clipbd.getContents(JNotepadTest.this); try { String clipString = (String)clipData.getTransferData( DataFlavor.stringFlavor); jta.replaceRange(clipString, jta.getSelectionStart(), jta.getSelectionEnd()); } catch(Exception ex) { } } } //删除 class deleteL implements ActionListener { public void actionPerformed(ActionEvent e) { String selection = jta.getSelectedText(); jta.replaceRange("", jta.getSelectionStart(), jta.getSelectionEnd()); } } //全部选择 class selectAllL implements ActionListener { public void actionPerformed(ActionEvent e) { jta.selectAll(); } } //字体设置 class formatL implements ActionListener { public void actionPerformed(ActionEvent e) { /*String find = ""; find = JOptionPane.showInputDialog( "查找的内容：");*/ } } //帮助 /*class helpL extends Dialog { } */ //事件监听 class jtaL implements ActionListener { public void actionPerformed(ActionEvent e) { } } //快捷键设置 file.add(jmi = new JMenuItem("新建", KeyEvent.VK_N)); jmi.addActionListener(new newL()); file.add(jmi = new JMenuItem("打开", KeyEvent.VK_O)); jmi.addActionListener(new openL()); file.add(jmi = new JMenuItem("保存", KeyEvent.VK_S)); jmi.addActionListener(new saveL()); file.addSeparator(); file.add(jmi = new JMenuItem("页面设置", KeyEvent.VK_G)); jmi.addActionListener(new pageSetupL()); file.add(jmi = new JMenuItem("打印", KeyEvent.VK_P)); jmi.addActionListener(new printL()); file.addSeparator(); file.add(jmi = new JMenuItem("退出", KeyEvent.VK_X)); jmi.addActionListener(new exitL()); edit.add(jmi = new JMenuItem("复制", KeyEvent.VK_C)); jmi.addActionListener(new copyL()); edit.add(jmi = new JMenuItem("剪切", KeyEvent.VK_T)); jmi.addActionListener(new cutL()); edit.add(jmi = new JMenuItem("粘帖", KeyEvent.VK_P)); jmi.addActionListener(new pasteL()); edit.add(jmi = new JMenuItem("删除", KeyEvent.VK_D)); jmi.addActionListener(new deleteL()); edit.addSeparator(); edit.add(jmi = new JMenuItem("全选", KeyEvent.VK_A)); jmi.addActionListener(new selectAllL()); format.add(jmi = new JMenuItem("字体设置", KeyEvent.VK_F)); jmi.addActionListener(new formatL()); //设置页面布局风格 setLayout(new BorderLayout()); file.setMnemonic(KeyEvent.VK_F); jmb.add(file); edit.setMnemonic(KeyEvent.VK_E); jmb.add(edit); format.setMnemonic(KeyEvent.VK_S); jmb.add(format); jmb.add(Box.createHorizontalGlue()); jmb.add(help); toolBar.setFloatable(true); addButtons(toolBar); add(jmb, BorderLayout.NORTH); add(toolBar, BorderLayout.CENTER); add(jsp, BorderLayout.SOUTH); jta.getCaret().setVisible(true); jta.setCaretPosition(0); } //添加按钮 protected void addButtons(JToolBar toolBar) { JButton button = new JButton(new ImageIcon("images/new.gif")); button.setToolTipText("新建一个文档"); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jta.setDocument(new PlainDocument()); } }); toolBar.add(button); //打开按钮 JButton button1 = new JButton(new ImageIcon("images/open.gif")); button1.setToolTipText("打开一个文档"); //添加按钮的事件监听 button1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser fc = new JFileChooser(); int returnVal = fc.showDialog(JNotepadTest.this, "打开文件"); if(returnVal == JFileChooser.APPROVE_OPTION) { String file = fc.getSelectedFile().getPath(); if(file == null) { return; } try { Reader in = new FileReader(file); char[] buff = new char[4096]; int nch; while((nch = in.read(buff, 0, buff.length)) != -1) { jta.setDocument(new PlainDocument()); jta.append(new String(buff, 0, nch)); } } catch (IOException io)