记事本
Posted mingye
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1 package mingye; 2 import java.awt.*; 3 import java.awt.event.*; 4 import java.text.*; 5 import java.util.*; 6 import java.io.*; 7 import javax.swing.undo.*; 8 import javax.swing.border.*; 9 import javax.swing.*; 10 import javax.swing.text.*; 11 import javax.swing.event.*; 12 import java.awt.datatransfer.*; 13 14 15 public class NoteTest extends JFrame implements ActionListener,DocumentListener 16 { 17 JMenu fileMenu,editMenu,formatMenu,viewMenu,helpMenu; 18 JPopupMenu popupMenu; 19 JMenuItem popupMenu_Undo,popupMenu_Cut,popupMenu_Copy,popupMenu_Paste,popupMenu_Delete,popupMenu_SelectAll; 20 JMenuItem fileMenu_New,fileMenu_Open,fileMenu_Save,fileMenu_SaveAs,fileMenu_PageSetUp,fileMenu_Print,fileMenu_Exit; 21 JMenuItem editMenu_Undo,editMenu_Cut,editMenu_Copy,editMenu_Paste,editMenu_Delete,editMenu_Find,editMenu_FindNext,editMenu_Replace,editMenu_GoTo,editMenu_SelectAll,editMenu_TimeDate; 22 JCheckBoxMenuItem formatMenu_LineWrap; 23 JMenuItem formatMenu_Font; 24 JCheckBoxMenuItem viewMenu_Status; 25 JMenuItem helpMenu_HelpTopics,helpMenu_AboutNotepad; 26 JTextArea editArea; 27 JLabel statusLabel; 28 Toolkit toolkit=Toolkit.getDefaultToolkit(); 29 Clipboard clipBoard=toolkit.getSystemClipboard(); 30 protected UndoManager undo=new UndoManager(); 31 protected UndoableEditListener undoHandler=new UndoHandler(); 32 String oldValue; 33 boolean isNewFile=true; 34 File currentFile; 35 public NoteTest() 36 { 37 super("Java记事本"); 38 39 Font font = new Font("Dialog", Font.PLAIN, 12); 40 java.util.Enumeration keys = UIManager.getDefaults().keys(); 41 while (keys.hasMoreElements()) { 42 Object key = keys.nextElement(); 43 Object value = UIManager.get(key); 44 if (value instanceof javax.swing.plaf.FontUIResource) { 45 UIManager.put(key, font); 46 } 47 } 48 49 JMenuBar menuBar=new JMenuBar(); 50 51 fileMenu=new JMenu("文件(F)"); 52 fileMenu.setMnemonic(‘F‘); 53 54 fileMenu_New=new JMenuItem("新建(N)"); 55 fileMenu_New.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK)); 56 fileMenu_New.addActionListener(this); 57 58 fileMenu_Open=new JMenuItem("打开(O)..."); 59 fileMenu_Open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK)); 60 fileMenu_Open.addActionListener(this); 61 62 fileMenu_Save=new JMenuItem("保存(S)"); 63 fileMenu_Save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK)); 64 fileMenu_Save.addActionListener(this); 65 66 fileMenu_SaveAs=new JMenuItem("另存为(A)..."); 67 fileMenu_SaveAs.addActionListener(this); 68 69 fileMenu_PageSetUp=new JMenuItem("页面设置(U)..."); 70 fileMenu_PageSetUp.addActionListener(this); 71 72 fileMenu_Print=new JMenuItem("打印(P)..."); 73 fileMenu_Print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK)); 74 fileMenu_Print.addActionListener(this); 75 76 fileMenu_Exit=new JMenuItem("退出(X)"); 77 fileMenu_Exit.addActionListener(this); 78 79 80 editMenu=new JMenu("编辑(E)"); 81 editMenu.setMnemonic(‘E‘); 82 editMenu.addMenuListener(new MenuListener() 83 { public void menuCanceled(MenuEvent e) 84 { checkMenuItemEnabled(); 85 } 86 public void menuDeselected(MenuEvent e) 87 { checkMenuItemEnabled(); 88 } 89 public void menuSelected(MenuEvent e) 90 { checkMenuItemEnabled(); 91 } 92 }); 93 try { 94 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 95 } catch (ClassNotFoundException e1) { 96 // TODO Auto-generated catch block 97 e1.printStackTrace(); 98 } catch (InstantiationException e1) { 99 // TODO Auto-generated catch block 100 e1.printStackTrace(); 101 } catch (IllegalAccessException e1) { 102 // TODO Auto-generated catch block 103 e1.printStackTrace(); 104 } catch (UnsupportedLookAndFeelException e1) { 105 // TODO Auto-generated catch block 106 e1.printStackTrace(); 107 } 108 editMenu_Undo=new JMenuItem("撤销(U)"); 109 editMenu_Undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,InputEvent.CTRL_MASK)); 110 editMenu_Undo.addActionListener(this); 111 editMenu_Undo.setEnabled(false); 112 113 editMenu_Cut=new JMenuItem("剪切(T)"); 114 editMenu_Cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK)); 115 editMenu_Cut.addActionListener(this); 116 117 editMenu_Copy=new JMenuItem("复制(C)"); 118 editMenu_Copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK)); 119 editMenu_Copy.addActionListener(this); 120 121 editMenu_Paste=new JMenuItem("粘贴(P)"); 122 editMenu_Paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK)); 123 editMenu_Paste.addActionListener(this); 124 125 editMenu_Delete=new JMenuItem("删除(D)"); 126 editMenu_Delete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,0)); 127 editMenu_Delete.addActionListener(this); 128 129 editMenu_Find=new JMenuItem("查找(F)..."); 130 editMenu_Find.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputEvent.CTRL_MASK)); 131 editMenu_Find.addActionListener(this); 132 133 editMenu_FindNext=new JMenuItem("查找下一个(N)"); 134 editMenu_FindNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0)); 135 editMenu_FindNext.addActionListener(this); 136 137 editMenu_Replace = new JMenuItem("替换(R)...",‘R‘); 138 editMenu_Replace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK)); 139 editMenu_Replace.addActionListener(this); 140 141 editMenu_GoTo = new JMenuItem("转到(G)...",‘G‘); 142 editMenu_GoTo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G, InputEvent.CTRL_MASK)); 143 editMenu_GoTo.addActionListener(this); 144 145 editMenu_SelectAll = new JMenuItem("全选",‘A‘); 146 editMenu_SelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK)); 147 editMenu_SelectAll.addActionListener(this); 148 149 editMenu_TimeDate = new JMenuItem("时间/日期(D)",‘D‘); 150 editMenu_TimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,0)); 151 editMenu_TimeDate.addActionListener(this); 152 153 154 formatMenu=new JMenu("格式(O)"); 155 formatMenu.setMnemonic(‘O‘); 156 157 formatMenu_LineWrap=new JCheckBoxMenuItem("自动换行(W)"); 158 formatMenu_LineWrap.setMnemonic(‘W‘); 159 formatMenu_LineWrap.setState(true); 160 formatMenu_LineWrap.addActionListener(this); 161 formatMenu_Font=new JMenuItem("字体(F)..."); 162 formatMenu_Font.addActionListener(this); 163 viewMenu=new JMenu("查看(V)"); 164 viewMenu.setMnemonic(‘V‘); 165 viewMenu_Status=new JCheckBoxMenuItem("状态栏(S)"); 166 viewMenu_Status.setMnemonic(‘S‘); 167 viewMenu_Status.setState(true); 168 viewMenu_Status.addActionListener(this); 169 helpMenu = new JMenu("帮助(H)"); 170 helpMenu.setMnemonic(‘H‘); 171 helpMenu_AboutNotepad = new JMenuItem("关于记事本(A)"); 172 helpMenu_AboutNotepad.addActionListener(this); 173 174 menuBar.add(fileMenu); 175 fileMenu.add(fileMenu_New); 176 fileMenu.add(fileMenu_Open); 177 fileMenu.add(fileMenu_Save); 178 fileMenu.add(fileMenu_SaveAs); 179 fileMenu.addSeparator(); 180 fileMenu.add(fileMenu_PageSetUp); 181 fileMenu.add(fileMenu_Print); 182 fileMenu.addSeparator(); 183 fileMenu.add(fileMenu_Exit); 184 185 menuBar.add(editMenu); 186 editMenu.add(editMenu_Undo); 187 editMenu.addSeparator(); 188 editMenu.add(editMenu_Cut); 189 editMenu.add(editMenu_Copy); 190 editMenu.add(editMenu_Paste); 191 editMenu.add(editMenu_Delete); 192 editMenu.addSeparator(); 193 editMenu.add(editMenu_Find); 194 editMenu.add(editMenu_FindNext); 195 editMenu.add(editMenu_Replace); 196 editMenu.add(editMenu_GoTo); 197 editMenu.addSeparator(); 198 editMenu.add(editMenu_SelectAll); 199 editMenu.add(editMenu_TimeDate); 200 201 202 menuBar.add(formatMenu); 203 formatMenu.add(formatMenu_LineWrap); 204 formatMenu.add(formatMenu_Font); 205 206 menuBar.add(viewMenu); 207 viewMenu.add(viewMenu_Status); 208 209 menuBar.add(helpMenu); 210 211 212 helpMenu.add(helpMenu_AboutNotepad); 213 214 this.setJMenuBar(menuBar); 215 216 editArea=new JTextArea(20,50); 217 JScrollPane scroller=new JScrollPane(editArea); 218 scroller.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 219 this.add(scroller,BorderLayout.CENTER); 220 editArea.setWrapStyleWord(true); 221 editArea.setLineWrap(true); 222 oldValue=editArea.getText(); 223 editArea.getDocument().addUndoableEditListener(undoHandler); 224 editArea.getDocument().addDocumentListener(this); 225 popupMenu=new JPopupMenu(); 226 popupMenu_Undo=new JMenuItem("撤销(U)"); 227 popupMenu_Cut=new JMenuItem("剪切(T)"); 228 popupMenu_Copy=new JMenuItem("复制(C)"); 229 popupMenu_Paste=new JMenuItem("粘帖(P)"); 230 popupMenu_Delete=new JMenuItem("删除(D)"); 231 popupMenu_SelectAll=new JMenuItem("全选(A)"); 232 popupMenu_Undo.setEnabled(false); 233 popupMenu.add(popupMenu_Undo); 234 popupMenu.addSeparator(); 235 popupMenu.add(popupMenu_Cut); 236 popupMenu.add(popupMenu_Copy); 237 popupMenu.add(popupMenu_Paste); 238 popupMenu.add(popupMenu_Delete); 239 popupMenu.addSeparator(); 240 popupMenu.add(popupMenu_SelectAll); 241 popupMenu_Undo.addActionListener(this); 242 popupMenu_Cut.addActionListener(this); 243 popupMenu_Copy.addActionListener(this); 244 popupMenu_Paste.addActionListener(this); 245 popupMenu_Delete.addActionListener(this); 246 popupMenu_SelectAll.addActionListener(this); 247 editArea.addMouseListener(new MouseAdapter() 248 { public void mousePressed(MouseEvent e) 249 { if(e.isPopupTrigger()) 250 { popupMenu.show(e.getComponent(),e.getX(),e.getY()); 251 } 252 checkMenuItemEnabled(); 253 editArea.requestFocus(); 254 } 255 public void mouseReleased(MouseEvent e) 256 { if(e.isPopupTrigger()) 257 { popupMenu.show(e.getComponent(),e.getX(),e.getY()); 258 } 259 checkMenuItemEnabled(); 260 editArea.requestFocus(); 261 } 262 }); 263 264 265 setBounds(360,100,650,500); 266 setVisible(true); 267 268 addWindowListener(new WindowAdapter() 269 { public void windowClosing(WindowEvent e) 270 { exitWindowChoose(); 271 } 272 }); 273 274 checkMenuItemEnabled(); 275 editArea.requestFocus(); 276 } 277 278 public void checkMenuItemEnabled() 279 { String selectText=editArea.getSelectedText(); 280 if(selectText==null) 281 { editMenu_Cut.setEnabled(false); 282 popupMenu_Cut.setEnabled(false); 283 editMenu_Copy.setEnabled(false); 284 popupMenu_Copy.setEnabled(false); 285 editMenu_Delete.setEnabled(false); 286 popupMenu_Delete.setEnabled(false); 287 } 288 else 289 { editMenu_Cut.setEnabled(true); 290 popupMenu_Cut.setEnabled(true); 291 editMenu_Copy.setEnabled(true); 292 popupMenu_Copy.setEnabled(true); 293 editMenu_Delete.setEnabled(true); 294 popupMenu_Delete.setEnabled(true); 295 } 296 297 Transferable contents=clipBoard.getContents(this); 298 if(contents==null) 299 { editMenu_Paste.setEnabled(false); 300 popupMenu_Paste.setEnabled(false); 301 } 302 else 303 { editMenu_Paste.setEnabled(true); 304 popupMenu_Paste.setEnabled(true); 305 } 306 } 307 308 public void exitWindowChoose() 309 { editArea.requestFocus(); 310 String currentValue=editArea.getText(); 311 if(currentValue.equals(oldValue)==true) 312 { System.exit(0); 313 } 314 else 315 { int exitChoose=JOptionPane.showConfirmDialog(this,"您的文件尚未保存，是否保存？","退出提示",JOptionPane.YES_NO_CANCEL_OPTION); 316 if(exitChoose==JOptionPane.YES_OPTION) 317 { 318 if(isNewFile) 319 { 320 String str=null; 321 JFileChooser fileChooser=new JFileChooser(); 322 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 323 fileChooser.setApproveButtonText("确定"); 324 fileChooser.setDialogTitle("另存为"); 325 326 int result=fileChooser.showSaveDialog(this); 327 328 if(result==JFileChooser.CANCEL_OPTION) 329 { statusLabel.setText(" 您没有保存文件"); 330 return; 331 } 332 333 File saveFileName=fileChooser.getSelectedFile(); 334 335 if(saveFileName==null||saveFileName.getName().equals("")) 336 { JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE); 337 } 338 else 339 { try 340 { FileWriter fw=new FileWriter(saveFileName); 341 BufferedWriter bfw=new BufferedWriter(fw); 342 bfw.write(editArea.getText(),0,editArea.getText().length()); 343 bfw.flush(); 344 fw.close(); 345 346 isNewFile=false; 347 currentFile=saveFileName; 348 oldValue=editArea.getText(); 349 350 this.setTitle(saveFileName.getName()+" - 记事本"); 351 statusLabel.setText(" 当前打开文件:"+saveFileName.getAbsoluteFile()); 352 //isSave=true; 353 } 354 catch(IOException ioException){ 355 } 356 } 357 } 358 else 359 { 360 try 361 { FileWriter fw=new FileWriter(currentFile); 362 BufferedWriter bfw=new BufferedWriter(fw); 363 bfw.write(editArea.getText(),0,editArea.getText().length()); 364 bfw.flush(); 365 fw.close(); 366 367 } 368 catch(IOException ioException){ 369 } 370 } 371 System.exit(0); 372 373 } 374 else if(exitChoose==JOptionPane.NO_OPTION) 375 { System.exit(0); 376 } 377 else 378 { return; 379 } 380 } 381 } 382 383 public void find() 384 { final JDialog findDialog=new JDialog(this,"查找",false); 385 Container con=findDialog.getContentPane(); 386 con.setLayout(new FlowLayout(FlowLayout.LEFT)); 387 JLabel findContentLabel=new JLabel("查找内容(N)："); 388 final JTextField findText=new JTextField(15); 389 JButton findNextButton=new JButton("查找下一个(F)："); 390 final JCheckBox matchCheckBox=new JCheckBox("区分大小写(C)"); 391 ButtonGroup bGroup=new ButtonGroup(); 392 final JRadioButton upButton=new JRadioButton("向上(U)"); 393 final JRadioButton downButton=new JRadioButton("向下(U)"); 394 downButton.setSelected(true); 395 bGroup.add(upButton); 396 bGroup.add(downButton); 397 398 JButton cancel=new JButton("取消"); 399 400 cancel.addActionListener(new ActionListener() 401 { public void actionPerformed(ActionEvent e) 402 { findDialog.dispose(); 403 } 404 }); 405 406 findNextButton.addActionListener(new ActionListener() 407 { public void actionPerformed(ActionEvent e) 408 { 409 int k=0,m=0; 410 final String str1,str2,str3,str4,strA,strB; 411 str1=editArea.getText(); 412 str2=findText.getText(); 413 str3=str1.toUpperCase(); 414 str4=str2.toUpperCase(); 415 if(matchCheckBox.isSelected()) 416 { strA=str1; 417 strB=str2; 418 } 419 else 420 { strA=str3; 421 strB=str4; 422 } 423 if(upButton.isSelected()) 424 { 425 if(editArea.getSelectedText()==null) 426 k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1); 427 else 428 k=strA.lastIndexOf(strB, editArea.getCaretPosition()-findText.getText().length()-1); 429 if(k>-1) 430 { 431 editArea.setCaretPosition(k); 432 editArea.select(k,k+strB.length()); 433 } 434 else 435 { JOptionPane.showMessageDialog(null,"查找失败！","查找",JOptionPane.INFORMATION_MESSAGE); 436 } 437 } 438 else if(downButton.isSelected()) 439 { if(editArea.getSelectedText()==null) 440 k=strA.indexOf(strB,editArea.getCaretPosition()+1); 441 else 442 k=strA.indexOf(strB, editArea.getCaretPosition()-findText.getText().length()+1); 443 if(k>-1) 444 { //String strData=strA.subString(k,strB.getText().length()+1); 445 editArea.setCaretPosition(k); 446 editArea.select(k,k+strB.length()); 447 } 448 else 449 { JOptionPane.showMessageDialog(null,"查找失败！","查找",JOptionPane.INFORMATION_MESSAGE); 450 } 451 } 452 } 453 }); 454 JPanel panel1=new JPanel(); 455 JPanel panel2=new JPanel(); 456 JPanel panel3=new JPanel(); 457 JPanel directionPanel=new JPanel(); 458 directionPanel.setBorder(BorderFactory.createTitledBorder("方向")); 459 directionPanel.add(upButton); 460 directionPanel.add(downButton); 461 panel1.setLayout(new GridLayout(2,1)); 462 panel1.add(findNextButton); 463 panel1.add(cancel); 464 panel2.add(findContentLabel); 465 panel2.add(findText); 466 panel2.add(panel1); 467 panel3.add(matchCheckBox); 468 panel3.add(directionPanel); 469 con.add(panel2); 470 con.add(panel3); 471 findDialog.setSize(410,180); 472 findDialog.setResizable(false);//不可调整大小 473 findDialog.setLocation(230,280); 474 findDialog.setVisible(true); 475 } 476 477 public void replace() 478 { final JDialog replaceDialog=new JDialog(this,"替换",false); 479 Container con=replaceDialog.getContentPane(); 480 con.setLayout(new FlowLayout(FlowLayout.CENTER)); 481 JLabel findContentLabel=new JLabel("查找内容(N)："); 482 final JTextField findText=new JTextField(15); 483 JButton findNextButton=new JButton("查找下一个(F):"); 484 JLabel replaceLabel=new JLabel("替换为(P)："); 485 final JTextField replaceText=new JTextField(15); 486 JButton replaceButton=new JButton("替换(R)"); 487 JButton replaceAllButton=new JButton("全部替换(A)"); 488 JButton cancel=new JButton("取消"); 489 cancel.addActionListener(new ActionListener() 490 { public void actionPerformed(ActionEvent e) 491 { replaceDialog.dispose(); 492 } 493 }); 494 final JCheckBox matchCheckBox=new JCheckBox("区分大小写(C)"); 495 ButtonGroup bGroup=new ButtonGroup(); 496 final JRadioButton upButton=new JRadioButton("向上(U)"); 497 final JRadioButton downButton=new JRadioButton("向下(U)"); 498 downButton.setSelected(true); 499 bGroup.add(upButton); 500 501 findNextButton.addActionListener(new ActionListener() 502 { public void actionPerformed(ActionEvent e) 503 { 504 int k=0,m=0; 505 final String str1,str2,str3,str4,strA,strB; 506 str1=editArea.getText(); 507 str2=findText.getText(); 508 str3=str1.toUpperCase(); 509 str4=str2.toUpperCase(); 510 if(matchCheckBox.isSelected())//区分大小写 511 { strA=str1; 512 strB=str2; 513 } 514 else 515 { strA=str3; 516 strB=str4; 517 } 518 if(upButton.isSelected()) 519 { 520 if(editArea.getSelectedText()==null) 521 k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1); 522 else 523 k=strA.lastIndexOf(strB, editArea.getCaretPosition()-findText.getText().length()-1); 524 if(k>-1) 525 { 526 editArea.setCaretPosition(k); 527 editArea.select(k,k+strB.length()); 528 } 529 else 530 { JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE); 531 } 532 } 533 else if(downButton.isSelected()) 534 { if(editArea.getSelectedText()==null) 535 k=strA.indexOf(strB,editArea.getCaretPosition()+1); 536 else 537 k=strA.indexOf(strB, editArea.getCaretPosition()-findText.getText().length()+1); 538 if(k>-1) 539 { 540 editArea.setCaretPosition(k); 541 editArea.select(k,k+strB.length()); 542 } 543 else 544 { JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE); 545 } 546 } 547 } 548 }); 549 550 551 replaceButton.addActionListener(new ActionListener() 552 { public void actionPerformed(ActionEvent e) 553 { if(replaceText.getText().length()==0 && editArea.getSelectedText()!=null) 554 editArea.replaceSelection(""); 555 if(replaceText.getText().length()>0 && editArea.getSelectedText()!=null) 556 editArea.replaceSelection(replaceText.getText()); 557 } 558 }); 559 560 replaceAllButton.addActionListener(new ActionListener() 561 { public void actionPerformed(ActionEvent e) 562 { editArea.setCaretPosition(0); 563 int k=0,m=0,replaceCount=0; 564 if(findText.getText().length()==0) 565 { JOptionPane.showMessageDialog(replaceDialog,"请填写您要查找的内容!","提示",JOptionPane.WARNING_MESSAGE); 566 findText.requestFocus(true); 567 return; 568 } 569 while(k>-1) 570 { 571 final String str1,str2,str3,str4,strA,strB; 572 str1=editArea.getText(); 573 str2=findText.getText(); 574 str3=str1.toUpperCase(); 575 str4=str2.toUpperCase(); 576 if(matchCheckBox.isSelected())//区分大小写 577 { strA=str1; 578 strB=str2; 579 } 580 else 581 { strA=str3; 582 strB=str4; 583 } 584 if(upButton.isSelected()) 585 { 586 if(editArea.getSelectedText()==null) 587 k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1); 588 else 589 k=strA.lastIndexOf(strB, editArea.getCaretPosition()-findText.getText().length()-1); 590 if(k>-1) 591 { 592 editArea.setCaretPosition(k); 593 editArea.select(k,k+strB.length()); 594 } 595 else 596 { if(replaceCount==0) 597 { JOptionPane.showMessageDialog(replaceDialog, "查找失败!", "记事本",JOptionPane.INFORMATION_MESSAGE); 598 } 599 else 600 { JOptionPane.showMessageDialog(replaceDialog,"成功替换"+replaceCount+"个相关内容!","替换成功",JOptionPane.INFORMATION_MESSAGE); 601 } 602 } 603 } 604 else if(downButton.isSelected()) 605 { if(editArea.getSelectedText()==null) 606 k=strA.indexOf(strB,editArea.getCaretPosition()+1); 607 else 608 k=strA.indexOf(strB, editArea.getCaretPosition()-findText.getText().length()+1); 609 if(k>-1) 610 { 611 editArea.setCaretPosition(k); 612 editArea.select(k,k+strB.length()); 613 } 614 else 615 { if(replaceCount==0) 616 { JOptionPane.showMessageDialog(replaceDialog, "查找失败!", "记事本",JOptionPane.INFORMATION_MESSAGE); 617 } 618 else 619 { JOptionPane.showMessageDialog(replaceDialog,"成功替换"+replaceCount+"个匹配内容!","替换成功",JOptionPane.INFORMATION_MESSAGE); 620 } 621 } 622 } 623 if(replaceText.getText().length()==0 && editArea.getSelectedText()!= null) 624 { editArea.replaceSelection(""); 625 replaceCount++; 626 } 627 628 if(replaceText.getText().length()>0 && editArea.getSelectedText()!= null) 629 { editArea.replaceSelection(replaceText.getText()); 630 replaceCount++; 631 } 632 } 633 } 634 }); 635 JPanel directionPanel=new JPanel(); 636 directionPanel.setBorder(BorderFactory.createTitledBorder("方向")); 637 directionPanel.add(upButton); 638 directionPanel.add(downButton); 639 JPanel panel1=new JPanel(); 640 JPanel panel2=new JPanel(); 641 JPanel panel3=new JPanel(); 642 JPanel panel4=new JPanel(); 643 panel4.setLayout(new GridLayout(2,1)); 644 panel1.add(findContentLabel); 645 panel1.add(findText); 646 panel1.add(findNextButton); 647 panel4.add(replaceButton); 648 panel4.add(replaceAllButton); 649 panel2.add(replaceLabel); 650 panel2.add(replaceText); 651 panel2.add(panel4); 652 panel3.add(matchCheckBox); 653 panel3.add(directionPanel); 654 panel3.add(cancel); 655 con.add(panel1); 656 con.add(panel2); 657 con.add(panel3); 658 replaceDialog.setSize(420,220); 659 replaceDialog.setResizable(false);//不可调整大小 660 replaceDialog.setLocation(230,280); 661 replaceDialog.setVisible(true); 662 } 663 public void font() 664 { final JDialog fontDialog=new JDialog(this,"字体设置",false); 665 Container con=fontDialog.getContentPane(); 666 con.setLayout(new FlowLayout(FlowLayout.LEFT)); 667 JLabel fontLabel=new JLabel("字体(F)："); 668 fontLabel.setPreferredSize(new Dimension(100,20)); 669 JLabel styleLabel=new JLabel("字形(Y)："); 670 styleLabel.setPreferredSize(new Dimension(100,20)); 671 JLabel sizeLabel=new JLabel("大小(S)："); 672 sizeLabel.setPreferredSize(new Dimension(100,20)); 673 final JLabel sample=new JLabel("明少的记事本"); 674 final JTextField fontText=new JTextField(9); 675 fontText.setPreferredSize(new Dimension(200,20)); 676 final JTextField styleText=new JTextField(8); 677 styleText.setPreferredSize(new Dimension(200,20)); 678 final int style[]={Font.PLAIN,Font.BOLD,Font.ITALIC,Font.BOLD+Font.ITALIC}; 679 final JTextField sizeText=new JTextField(5); 680 sizeText.setPreferredSize(new Dimension(200,20)); 681 JButton okButton=new JButton("确定"); 682 JButton cancel=new JButton("取消"); 683 cancel.addActionListener(new ActionListener() 684 { public void actionPerformed(ActionEvent e) 685 { fontDialog.dispose(); 686 } 687 }); 688 Font currentFont=editArea.getFont(); 689 fontText.setText(currentFont.getFontName()); 690 fontText.selectAll(); 691 if(currentFont.getStyle()==Font.PLAIN) 692 styleText.setText("常规"); 693 else if(currentFont.getStyle()==Font.BOLD) 694 styleText.setText("粗体"); 695 else if(currentFont.getStyle()==Font.ITALIC) 696 styleText.setText("斜体"); 697 else if(currentFont.getStyle()==(Font.BOLD+Font.ITALIC)) 698 styleText.setText("粗斜体"); 699 styleText.selectAll(); 700 String str=String.valueOf(currentFont.getSize()); 701 sizeText.setText(str); 702 sizeText.selectAll(); 703 final JList fontList,styleList,sizeList; 704 GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment(); 705 final String fontName[]=ge.getAvailableFontFamilyNames(); 706 fontList=new JList(fontName); 707 fontList.setFixedCellWidth(86); 708 fontList.setFixedCellHeight(20); 709 fontList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 710 final String fontStyle[]={"常规","粗体","斜体","粗斜体"}; 711 styleList=new JList(fontStyle); 712 styleList.setFixedCellWidth(86); 713 styleList.setFixedCellHeight(20); 714 styleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 715 if(currentFont.getStyle()==Font.PLAIN) 716 styleList.setSelectedIndex(0); 717 else if(currentFont.getStyle()==Font.BOLD) 718 styleList.setSelectedIndex(1); 719 else if(currentFont.getStyle()==Font.ITALIC) 720 styleList.setSelectedIndex(2); 721 else if(currentFont.getStyle()==(Font.BOLD+Font.ITALIC)) 722 styleList.setSelectedIndex(3); 723 final String fontSize[]={"8","9","10","11","12","14","16","18","20","22","24","26","28","36","48","72"}; 724 sizeList=new JList(fontSize); 725 sizeList.setFixedCellWidth(43); 726 sizeList.setFixedCellHeight(20); 727 sizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 728 fontList.addListSelectionListener(new ListSelectionListener() 729 { public void valueChanged(ListSelectionEvent event) 730 { fontText.setText(fontName[fontList.getSelectedIndex()]); 731 fontText.selectAll(); 732 Font sampleFont1=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText())); 733 sample.setFont(sampleFont1); 734 } 735 }); 736 styleList.addListSelectionListener(new ListSelectionListener() 737 { public void valueChanged(ListSelectionEvent event) 738 { int s=style[styleList.getSelectedIndex()]; 739 styleText.setText(fontStyle[s]); 740 styleText.selectAll(); 741 Font sampleFont2=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText())); 742 sample.setFont(sampleFont2); 743 } 744 }); 745 sizeList.addListSelectionListener(new ListSelectionListener() 746 { public void valueChanged(ListSelectionEvent event) 747 { sizeText.setText(fontSize[sizeList.getSelectedIndex()]); 748 //sizeText.requestFocus(); 749 sizeText.selectAll(); 750 Font sampleFont3=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText())); 751 sample.setFont(sampleFont3); 752 } 753 }); 754 okButton.addActionListener(new ActionListener() 755 { public void actionPerformed(ActionEvent e) 756 { Font okFont=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText())); 757 editArea.setFont(okFont); 758 fontDialog.dispose(); 759 } 760 }); 761 JPanel samplePanel=new JPanel(); 762 samplePanel.setBorder(BorderFactory.createTitledBorder("示例")); 763 samplePanel.add(sample); 764 JPanel panel1=new JPanel(); 765 JPanel panel2=new JPanel(); 766 JPanel panel3=new JPanel(); 767 panel2.add(fontText); 768 panel2.add(styleText); 769 panel2.add(sizeText); 770 panel2.add(okButton); 771 panel3.add(new JScrollPane(fontList));//JList不支持直接滚动，所以要让JList作为JScrollPane的视口视图 772 panel3.add(new JScrollPane(styleList)); 773 panel3.add(new JScrollPane(sizeList)); 774 panel3.add(cancel); 775 con.add(panel1); 776 con.add(panel2); 777 con.add(panel3); 778 con.add(samplePanel); 779 fontDialog.setSize(350,340); 780 fontDialog.setLocation(200,200); 781 fontDialog.setResizable(false); 782 fontDialog.setVisible(true); 783 } 784 785 786 public void actionPerformed(ActionEvent e) 787 { 788 if(e.getSource()==fileMenu_New) 789 { editArea.requestFocus(); 790 String currentValue=editArea.getText(); 791 boolean isTextChange=(currentValue.equals(oldValue))?false:true; 792 if(isTextChange) 793 { int saveChoose=JOptionPane.showConfirmDialog(this,"您的文件尚未保存，是否保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION); 794 if(saveChoose==JOptionPane.YES_OPTION) 795 { String str=null; 796 JFileChooser fileChooser=new JFileChooser(); 797 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 798 fileChooser.setDialogTitle("另存为"); 799 int result=fileChooser.showSaveDialog(this); 800 if(result==JFileChooser.CANCEL_OPTION) 801 { statusLabel.setText("您没有选择任何文件"); 802 return; 803 } 804 File saveFileName=fileChooser.getSelectedFile(); 805 if(saveFileName==null || saveFileName.getName().equals("")) 806 { JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE); 807 } 808 else 809 { try 810 { FileWriter fw=new FileWriter(saveFileName); 811 BufferedWriter bfw=new BufferedWriter(fw); 812 bfw.write(editArea.getText(),0,editArea.getText().length()); 813 bfw.flush(); 814 bfw.close(); 815 isNewFile=false; 816 currentFile=saveFileName; 817 oldValue=editArea.getText(); 818 this.setTitle(saveFileName.getName()+" - 记事本"); 819 statusLabel.setText("当前打开文件："+saveFileName.getAbsoluteFile()); 820 } 821 catch (IOException ioException) 822 { 823 } 824 } 825 } 826 else if(saveChoose==JOptionPane.NO_OPTION) 827 { editArea.replaceRange("",0,editArea.getText().length()); 828 statusLabel.setText(" 新建文件"); 829 this.setTitle("无标题 - 记事本"); 830 isNewFile=true; 831 undo.discardAllEdits(); 832 editMenu_Undo.setEnabled(false); 833 oldValue=editArea.getText(); 834 } 835 else if(saveChoose==JOptionPane.CANCEL_OPTION) 836 { return; 837 } 838 } 839 else 840 { editArea.replaceRange("",0,editArea.getText().length()); 841 statusLabel.setText(" 新建文件"); 842 this.setTitle("无标题 - 记事本"); 843 isNewFile=true; 844 undo.discardAllEdits(); 845 editMenu_Undo.setEnabled(false); 846 oldValue=editArea.getText(); 847 } 848 } 849 850 else if(e.getSource()==fileMenu_Open) 851 { editArea.requestFocus(); 852 String currentValue=editArea.getText(); 853 boolean isTextChange=(currentValue.equals(oldValue))?false:true; 854 if(isTextChange) 855 { int saveChoose=JOptionPane.showConfirmDialog(this,"您的文件尚未保存，是否保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION); 856 if(saveChoose==JOptionPane.YES_OPTION) 857 { String str=null; 858 JFileChooser fileChooser=new JFileChooser(); 859 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 860 fileChooser.setDialogTitle("另存为"); 861 int result=fileChooser.showSaveDialog(this); 862 if(result==JFileChooser.CANCEL_OPTION) 863 { statusLabel.setText("您没有选择任何文件"); 864 return; 865 } 866 File saveFileName=fileChooser.getSelectedFile(); 867 if(saveFileName==null || saveFileName.getName().equals("")) 868 { JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE); 869 } 870 else 871 { try 872 { FileWriter fw=new FileWriter(saveFileName); 873 BufferedWriter bfw=new BufferedWriter(fw); 874 bfw.write(editArea.getText(),0,editArea.getText().length()); 875 bfw.flush(); 876 bfw.close(); 877 isNewFile=false; 878 currentFile=saveFileName; 879 oldValue=editArea.getText(); 880 this.setTitle(saveFileName.getName()+" - 记事本"); 881 statusLabel.setText("当前打开文件："+saveFileName.getAbsoluteFile()); 882 } 883 catch (IOException ioException) 884 { 885 } 886 } 887 } 888 else if(saveChoose==JOptionPane.NO_OPTION) 889 { String str=null; 890 JFileChooser fileChooser=new JFileChooser(); 891 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 892 893 fileChooser.setDialogTitle("打开文件"); 894 int result=fileChooser.showOpenDialog(this); 895 if(result==JFileChooser.CANCEL_OPTION) 896 { statusLabel.setText("您没有选择任何文件"); 897 return; 898 } 899 File fileName=fileChooser.getSelectedFile(); 900 if(fileName==null || fileName.getName().equals("")) 901 { JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE); 902 } 903 else 904 { try 905 { FileReader fr=new FileReader(fileName); 906 BufferedReader bfr=new BufferedReader(fr); 907 editArea.setText(""); 908 while((str=bfr.readLine())!=null) 909 { editArea.append(str); 910 } 911 this.setTitle(fileName.getName()+" - 记事本"); 912 statusLabel.setText(" 当前打开文件："+fileName.getAbsoluteFile()); 913 fr.close(); 914 isNewFile=false; 915 currentFile=fileName; 916 oldValue=editArea.getText(); 917 } 918 catch (IOException ioException) 919 { 920 } 921 } 922 } 923 else 924 { return; 925 } 926 } 927 else 928 { String str=null; 929 JFileChooser fileChooser=new JFileChooser(); 930 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 931 fileChooser.setDialogTitle("打开文件"); 932 int result=fileChooser.showOpenDialog(this); 933 if(result==JFileChooser.CANCEL_OPTION) 934 { statusLabel.setText(" 您没有选择任何文件 "); 935 return; 936 } 937 File fileName=fileChooser.getSelectedFile(); 938 if(fileName==null || fileName.getName().equals("")) 939 { JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE); 940 } 941 else 942 { try 943 { FileReader fr=new FileReader(fileName); 944 BufferedReader bfr=new BufferedReader(fr); 945 editArea.setText(""); 946 while((str=bfr.readLine())!=null) 947 { editArea.append(str); 948 } 949 this.setTitle(fileName.getName()+" - 记事本"); 950 statusLabel.setText(" 当前打开文件："+fileName.getAbsoluteFile()); 951 fr.close(); 952 isNewFile=false; 953 currentFile=fileName; 954 oldValue=editArea.getText(); 955 } 956 catch (IOException ioException) 957 { 958 } 959 } 960 } 961 } 962 else if(e.getSource()==fileMenu_Save) 963 { editArea.requestFocus(); 964 if(isNewFile) 965 { String str=null; 966 JFileChooser fileChooser=new JFileChooser(); 967 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 968 fileChooser.setDialogTitle("保存"); 969 int result=fileChooser.showSaveDialog(this); 970 if(result==JFileChooser.CANCEL_OPTION) 971 { statusLabel.setText("您没有选择任何文件"); 972 return; 973 } 974 File saveFileName=fileChooser.getSelectedFile(); 975 if(saveFileName==null || saveFileName.getName().equals("")) 976 { JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE); 977 } 978 else 979 { try 980 { FileWriter fw=new FileWriter(saveFileName); 981 BufferedWriter bfw=new BufferedWriter(fw); 982 bfw.write(editArea.getText(),0,editArea.getText().length()); 983 bfw.flush(); 984 bfw.close(); 985 isNewFile=false; 986 currentFile=saveFileName; 987 oldValue=editArea.getText(); 988 this.setTitle(saveFileName.getName()+" - 记事本"); 989 statusLabel.setText("当前打开文件："+saveFileName.getAbsoluteFile()); 990 } 991 catch (IOException ioException) 992 { 993 } 994 } 995 } 996 else 997 { try 998 { FileWriter fw=new FileWriter(currentFile); 999 BufferedWriter bfw=new BufferedWriter(fw); 1000 bfw.write(editArea.getText(),0,editArea.getText().length()); 1001 bfw.flush(); 1002 fw.close(); 1003 } 1004 catch(IOException ioException) 1005 { 1006 } 1007 } 1008 } 1009 else if(e.getSource()==fileMenu_SaveAs) 1010 { editArea.requestFocus(); 1011 String str=null; 1012 JFileChooser fileChooser=new JFileChooser(); 1013 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 1014 fileChooser.setDialogTitle("另存为"); 1015 int result=fileChooser.showSaveDialog(this); 1016 if(result==JFileChooser.CANCEL_OPTION) 1017 { statusLabel.setText(" 您没有选择任何文件"); 1018 return; 1019 } 1020 File saveFileName=fileChooser.getSelectedFile(); 1021 if(saveFileName==null||saveFileName.getName().equals("")) 1022 { JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE); 1023 } 1024 else 1025 { try 1026 { FileWriter fw=new FileWriter(saveFileName); 1027 BufferedWriter bfw=new BufferedWriter(fw); 1028 bfw.write(editArea.getText(),0,editArea.getText().length()); 1029 bfw.flush(); 1030 fw.close(); 1031 oldValue=editArea.getText(); 1032 this.setTitle(saveFileName.getName()+" - 记事本"); 1033 statusLabel.setText(" 当前打开文件:"+saveFileName.getAbsoluteFile()); 1034 } 1035 catch(IOException ioException) 1036 { 1037 } 1038 } 1039 } 1040 else if(e.getSource()==fileMenu_PageSetUp) 1041 { editArea.requestFocus(); 1042 JOptionPane.showMessageDialog(this,"Sorry,正在开发中！","提示",JOptionPane.WARNING_MESSAGE); 1043 } 1044 else if(e.getSource()==fileMenu_Print) 1045 { editArea.requestFocus(); 1046 JOptionPane.showMessageDialog(this,"Sorry,正在开发中！","提示",JOptionPane.WARNING_MESSAGE); 1047 } 1048 else if(e.getSource()==fileMenu_Exit) 1049 { int exitChoose=JOptionPane.showConfirmDialog(this,"确定要退出吗?","退出提示",JOptionPane.OK_CANCEL_OPTION); 1050 if(exitChoose==JOptionPane.OK_OPTION) 1051 { System.exit(0); 1052 } 1053 else 1054 { return; 1055 } 1056 } 1057 else if(e.getSource()==editMenu_Undo || e.getSource()==popupMenu_Undo) 1058 { editArea.requestFocus(); 1059 if(undo.canUndo()) 1060 { try 1061 { undo.undo(); 1062 } 1063 catch (CannotUndoException ex) 1064 { System.out.println("Unable to undo:" + ex); 1065 //ex.printStackTrace(); 1066 } 1067 } 1068 if(!undo.canUndo()) 1069 { editMenu_Undo.setEnabled(false); 1070 } 1071 } 1072 else if(e.getSource()==editMenu_Cut || e.getSource()==popupMenu_Cut) 1073 { editArea.requestFocus(); 1074 String text=editArea.getSelectedText(); 1075 StringSelection selection=new StringSelection(text); 1076 clipBoard.setContents(selection,null); 1077 editArea.replaceRange("",editArea.getSelectionStart(),editArea.getSelectionEnd()); 1078 checkMenuItemEnabled(); 1079 } 1080 else if(e.getSource()==editMenu_Copy || e.getSource()==popupMenu_Copy) 1081 { editArea.requestFocus(); 1082 String text=editArea.getSelectedText(); 1083 StringSelection selection=new StringSelection(text); 1084 clipBoard.setContents(selection,null); 1085 checkMenuItemEnabled(); 1086 } 1087 else if(e.getSource()==editMenu_Paste || e.getSource()==popupMenu_Paste) 1088 { editArea.requestFocus(); 1089 Transferable contents=clipBoard.getContents(this); 1090 if(contents==null)return; 1091 String text=""; 1092 try 1093 { text=(String)contents.getTransferData(DataFlavor.stringFlavor); 1094 } 1095 catch (Exception exception) 1096 { 1097 } 1098 editArea.replaceRange(text,editArea.getSelectionStart(),editArea.getSelectionEnd()); 1099 checkMenuItemEnabled(); 1100 } 1101 else if(e.getSource()==editMenu_Delete || e.getSource()==popupMenu_Delete) 1102 { editArea.requestFocus(); 1103 editArea.replaceRange("",editArea.getSelectionStart(),editArea.getSelectionEnd()); 1104 checkMenuItemEnabled(); 1105 } 1106 else if(e.getSource()==editMenu_Find) 1107 { editArea.requestFocus(); 1108 find(); 1109 } 1110 else if(e.getSource()==editMenu_FindNext) 1111 { editArea.requestFocus(); 1112 find(); 1113 } 1114 else if(e.getSource()==editMenu_Replace) 1115 { editArea.requestFocus(); 1116 replace(); 1117 } 1118 else if(e.getSource()==editMenu_GoTo) 1119 { editArea.requestFocus(); 1120 JOptionPane.showMessageDialog(this,"Sorry,正在开发中！","提示",JOptionPane.WARNING_MESSAGE); 1121 } 1122 else if(e.getSource()==editMenu_TimeDate) 1123 { editArea.requestFocus(); 1124 Calendar rightNow=Calendar.getInstance(); 1125 Date date=rightNow.getTime(); 1126 editArea.insert(date.toString(),editArea.getCaretPosition()); 1127 } 1128 else if(e.getSource()==editMenu_SelectAll || e.getSource()==popupMenu_SelectAll) 1129 { editArea.selectAll(); 1130 } 1131 else if(e.getSource()==formatMenu_LineWrap) 1132 { if(formatMenu_LineWrap.getState()) 1133 editArea.setLineWrap(true); 1134 else 1135 editArea.setLineWrap(false); 1136 } 1137 else if(e.getSource()==formatMenu_Font) 1138 { editArea.requestFocus(); 1139 font(); 1140 } 1141 else if(e.getSource()==viewMenu_Status) 1142 { if(viewMenu_Status.getState()) 1143 statusLabel.setVisible(true); 1144 else 1145 statusLabel.setVisible(false); 1146 } 1147 1148 else if(e.getSource()==helpMenu_AboutNotepad) 1149 { editArea.requestFocus(); 1150 JOptionPane.showMessageDialog(this, 1151 " 注: " + 1152 1153 " 这只是个简单的记事本哦！ ", 1154 "关于记事本·",JOptionPane.INFORMATION_MESSAGE); 1155 } 1156 } 1157 1158 public void removeUpdate(DocumentEvent e) 1159 { editMenu_Undo.setEnabled(true); 1160 } 1161 public void insertUpdate(DocumentEvent e) 1162 { editMenu_Undo.setEnabled(true); 1163 } 1164 public void changedUpdate(DocumentEvent e) 1165 { editMenu_Undo.setEnabled(true); 1166 } 1167 1168 class UndoHandler implements UndoableEditListener 1169 { public void undoableEditHappened(UndoableEditEvent uee) 1170 { undo.addEdit(uee.getEdit()); 1171 } 1172 } 1173 public static void main(String args[]) 1174 { NoteTest notepad=new NoteTest(); 1175 notepad.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 1176 } 1177 }
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