练习~记事本
功能类似win自带的记事本，只摘录重要功能，更加轻量级（好像没什么用，记事本本来就很轻量。。），增加剪贴板编辑，这个功能有时还是很方便的。。
值得注意的问题是写出硬盘时要用Writer的newLine()方法，使用平台自己的行分隔符，手动添加行分隔符经常出错。
1 import javax.swing.*; 2 import java.awt.*; 3 import java.awt.datatransfer.*; 4 import java.awt.event.*; 5 import java.io.*; 6 7 public class notepad { 8 9 //主方法 10 public static void main(String [] args){ 11 notepad no = new notepad(); 12 no.noteui(); 13 } 14 15 //创建界面 16 public JFrame jf = null; 17 public JTextArea ta = null; 18 public JMenuItem linew = null; 19 public void noteui(){ 20 //窗口 21 jf = new JFrame("记事本"); 22 jf.setSize(600, 500); 23 jf.setVisible(true); 24 //窗口居中显示 25 jf.setLocationRelativeTo(null); 26 jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 27 28 //菜单栏 29 JMenuBar menubar = new JMenuBar(); 30 jf.add(menubar, BorderLayout.NORTH); 31 JMenu file = new JMenu("文件"); 32 file.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 33 JMenu edit = new JMenu("编辑"); 34 edit.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 35 JMenu format = new JMenu("格式"); 36 format.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 37 JMenuItem clipB = new JMenuItem("剪贴板"); 38 clipB.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 39 menubar.add(file); 40 menubar.add(edit); 41 menubar.add(format); 42 menubar.add(clipB); 43 44 //文件下拉菜单 45 JMenuItem open = new JMenuItem("打开"); 46 JMenuItem save = new JMenuItem("保存"); 47 JMenuItem close = new JMenuItem("关闭"); 48 file.add(open); 49 file.add(save); 50 file.add(close); 51 52 //编辑下拉菜单 53 JMenuItem cut = new JMenuItem("剪切"); 54 JMenuItem copy = new JMenuItem("复制"); 55 JMenuItem paste = new JMenuItem("粘贴"); 56 JMenuItem find = new JMenuItem("查找"); 57 JMenuItem replace = new JMenuItem("替换"); 58 edit.add(cut); 59 edit.add(copy); 60 edit.add(paste); 61 edit.add(find); 62 edit.add(replace); 63 64 //格式下拉菜单 65 JMenuItem font = new JMenuItem("字体"); 66 linew = new JMenuItem("自动换行 ×"); 67 format.add(font); 68 format.add(linew); 69 70 //文本框 71 ta = new JTextArea(); 72 ta.setFont(new Font(zt, Font.PLAIN, zh)); 73 JScrollPane jt = new JScrollPane(ta); 74 jf.add(jt, BorderLayout.CENTER); 75 ta.requestFocus(); 76 77 //实现方法 78 open.addActionListener(new ActionListener(){ 79 public void actionPerformed(ActionEvent e) { 80 ifopen(); 81 } 82 }); 83 84 save.addActionListener(new ActionListener(){ 85 public void actionPerformed(ActionEvent e) { 86 savem(); 87 } 88 }); 89 90 close.addActionListener(new ActionListener(){ 91 public void actionPerformed(ActionEvent e) { 92 closem(); 93 } 94 }); 95 96 cut.addActionListener(new ActionListener(){ 97 public void actionPerformed(ActionEvent e) { 98 cutm(); 99 } 100 }); 101 102 copy.addActionListener(new ActionListener(){ 103 public void actionPerformed(ActionEvent e) { 104 copym(); 105 } 106 }); 107 108 paste.addActionListener(new ActionListener(){ 109 public void actionPerformed(ActionEvent e) { 110 pastem(); 111 } 112 }); 113 114 find.addActionListener(new ActionListener(){ 115 public void actionPerformed(ActionEvent e) { 116 findm(); 117 } 118 }); 119 120 replace.addActionListener(new ActionListener(){ 121 public void actionPerformed(ActionEvent e) { 122 replacem(); 123 } 124 }); 125 126 font.addActionListener(new ActionListener(){ 127 public void actionPerformed(ActionEvent e) { 128 fontm(); 129 } 130 }); 131 132 clipB.addActionListener(new ActionListener(){ 133 public void actionPerformed(ActionEvent e) { 134 clipBm(); 135 } 136 }); 137 138 linew.addActionListener(new ActionListener(){ 139 public void actionPerformed(ActionEvent e) { 140 linewm(); 141 } 142 }); 143 144 } 145 146 public void ifopen() { 147 if("".equals(wjm)){ 148 openm(); 149 }else{ 150 int option = JOptionPane.showConfirmDialog(null, 151 "是否放弃编辑该文本，打开新文本？", "正在编辑" + wjm, JOptionPane.YES_NO_OPTION, 152 JOptionPane.QUESTION_MESSAGE, null); 153 switch (option) { 154 case JOptionPane.YES_NO_OPTION: { 155 openm(); 156 break; 157 } 158 } 159 } 160 } 161 162 //打开方法 163 public JFrame openf = null; 164 public JTextField owji = null; 165 public JLabel otl = null; 166 public String wjm = ""; 167 public String nrold = ""; 168 public void openm(){ 169 openf = new JFrame("打开"); 170 openf.setVisible(true); 171 openf.setSize(500, 250); 172 openf.setLocationRelativeTo(null); 173 JPanel op = new JPanel(); 174 openf.add(op); 175 Box fbox = Box.createVerticalBox(); 176 op.add(fbox); 177 178 fbox.add(Box.createVerticalStrut(40)); 179 180 JPanel owjmp = new JPanel(); 181 owjmp.setOpaque(false); 182 JLabel owt = new JLabel("文件名或目录："); 183 owt.setFont(new Font("华文中宋", Font.PLAIN, 18)); 184 owji = new JTextField(20); 185 owji.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 186 JLabel owdt = new JLabel(".txt"); 187 owdt.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 188 owjmp.add(owt); 189 owjmp.add(owji); 190 owjmp.add(owdt); 191 fbox.add(owjmp); 192 193 fbox.add(Box.createVerticalStrut(20)); 194 195 JPanel obp = new JPanel(); 196 JButton odb = new JButton("打 开"); 197 odb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 198 JLabel obt = new JLabel(" "); 199 obt.setFont(new Font("华文中宋", Font.PLAIN, 15)); 200 JButton oqb = new JButton("创 建"); 201 oqb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 202 obp.add(odb); 203 obp.add(obt); 204 obp.add(oqb); 205 fbox.add(obp); 206 207 fbox.add(Box.createVerticalStrut(20)); 208 209 JPanel otp =new JPanel(); 210 otp.setOpaque(false); 211 otl = new JLabel(); 212 otl.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 213 otp.add(otl); 214 fbox.add(otp); 215 216 odb.addActionListener(new ActionListener(){ 217 public void actionPerformed(ActionEvent e) { 218 BufferedReader br1 = null; 219 BufferedReader br2 = null; 220 try{ 221 String name = owji.getText(); 222 if("".equals(name)){ 223 otl.setText("请输入文本的目录或当前目录下的文本名"); 224 }else{ 225 name = name + ".txt"; 226 if(name.indexOf("\\") != -1){ 227 //若为绝对目录，更改分隔符 228 name = name.replaceAll("\\\\", "/"); 229 } 230 File book = new File(name); 231 if(book.exists()){ 232 //文件存在时读入编辑器 233 br1 = new BufferedReader(new FileReader(book)); 234 int line = 0; 235 //判断有多少行 236 while(true){ 237 if(br1.readLine() != null){ 238 line++; 239 }else{ 240 br1.close(); 241 break; 242 } 243 } 244 br2 = new BufferedReader(new FileReader(book)); 245 //将文本内容转换为 String 类型 246 nrold = ""; 247 for(int i=0; i < line; i++){ 248 nrold = nrold + br2.readLine() + "\n"; 249 } 250 //str = str.substring(0,str.length()-2); 251 br2.close(); 252 ta.setText(nrold); 253 nrnew = nrold; 254 //关闭窗口，但不结束程序 255 openf.dispose(); 256 wjm = name; 257 jf.setTitle("记事本——正在编辑：" + wjm); 258 }else{ 259 //文件不存在时提示 260 otl.setText("找不到文本，请检查输入是否有误，或者“创建”该文本"); 261 } 262 } 263 264 }catch(IOException e1){ 265 JOptionPane.showMessageDialog(null, 266 e, "错误", JOptionPane.ERROR_MESSAGE); 267 }finally{ 268 try{ 269 if(br1 != null){ br1.close(); } 270 if(br2 != null){ br2.close(); } 271 }catch(IOException e1){ 272 System.out.println(e1); 273 } 274 } 275 } 276 }); 277 278 oqb.addActionListener(new ActionListener(){ 279 public void actionPerformed(ActionEvent e) { 280 String name = owji.getText(); 281 if("".equals(name)){ 282 otl.setText("请输入新文本的目录或文本名"); 283 }else{ 284 name = name + ".txt"; 285 if(name.indexOf("\\") != -1){ 286 //若为绝对目录，更改分隔符 287 name = name.replaceAll("\\\\", "/"); 288 } 289 File book = new File(name); 290 if(book.exists()){ 291 //文件存在时提示重写 292 int option = JOptionPane.showConfirmDialog(null, 293 "该文本已经存在，是否重写该文本？", "创建", JOptionPane.YES_NO_OPTION, 294 JOptionPane.INFORMATION_MESSAGE, null); 295 switch (option) { 296 case JOptionPane.YES_NO_OPTION: { 297 wjm = name; 298 build(); 299 break; 300 } 301 } 302 }else{ 303 wjm = name; 304 build(); 305 } 306 } 307 } 308 }); 309 } 310 311 //创建方法 312 public void build(){ 313 jf.setTitle("记事本——正在编辑：" + wjm); 314 nrnew = ta.getText(); 315 nrold = ""; 316 openf.dispose(); 317 if(s1 == 1){ 318 savem(); 319 } 320 } 321 322 //保存方法 323 public int s1 = 0; 324 public String nrnew = ""; 325 public void savem(){ 326 BufferedWriter bw = null; 327 try { 328 if ("".equals(wjm)) { 329 //消息提示框 330 int option = JOptionPane.showConfirmDialog(null, 331 "没有保存路径及文件名，是否现在设置保存路径及文件名？", "保存", JOptionPane.YES_NO_OPTION, 332 JOptionPane.INFORMATION_MESSAGE, null); 333 switch (option) { 334 case JOptionPane.YES_NO_OPTION: { 335 openm(); 336 s1 = 1; 337 otl.setText("请按“创建”添加保存路径及文件名"); 338 break; 339 } 340 //case JOptionPane.NO_OPTION: 341 // System.exit(0); 342 } 343 }else{ 344 nrnew = ta.getText(); 345 String[] sf = nrnew.split("\n"); 346 bw = new BufferedWriter(new FileWriter(wjm)); 347 for (int i = 0; i < sf.length; i++) { 348 bw.write(sf[i]); 349 bw.newLine(); 350 } 351 nrold = nrnew; 352 s1 = 0; 353 } 354 } catch (IOException e) { 355 JOptionPane.showMessageDialog(null, 356 e, "错误", JOptionPane.ERROR_MESSAGE); 357 } finally{ 358 try{ 359 if(bw != null){ bw.close(); } 360 }catch(IOException e1){ 361 System.out.println(e1); 362 } 363 } 364 } 365 366 //关闭方法 367 public void closem(){ 368 nrnew = ta.getText(); 369 if (nrold.equals(nrnew)) { 370 if("".equals(wjm)){ 371 System.exit(0); 372 }else{ 373 wjm = ""; 374 jf.setTitle("记事本"); 375 nrnew = nrold = ""; 376 ta.setText(nrold); 377 } 378 } else { 379 int option = JOptionPane.showConfirmDialog(null, 380 "文件已修改，是否保存？", "保存文件？", JOptionPane.YES_NO_OPTION, 381 JOptionPane.QUESTION_MESSAGE, null); 382 switch (option) { 383 case JOptionPane.YES_NO_OPTION: { 384 savem(); 385 if (!("".equals(wjm))) { 386 closem(); 387 } 388 break; 389 } 390 case JOptionPane.NO_OPTION: { 391 nrold = nrnew; 392 closem(); 393 } 394 } 395 } 396 } 397 398 /**不使用系统剪贴板*/ 399 /* 400 //剪切方法 401 String clipb= null; 402 public void cutm(){ 403 //获取被选中的文本域 404 clipb = ta.getSelectedText(); 405 ta.replaceRange("",ta.getSelectionStart(),ta.getSelectionEnd()); 406 } 407 408 //复制方法 409 public void copym(){ 410 clipb = ta.getSelectedText(); 411 } 412 413 //粘贴方法 414 public void pastem(){ 415 ta.replaceRange(clipb,ta.getSelectionStart(),ta.getSelectionEnd()); 416 } 417 418 //剪贴板编辑 419 public JFrame jtf = null; 420 public JTextArea jtb = null; 421 public void clipBm() { 422 jtf = new JFrame("剪贴板"); 423 jtf.setSize(500, 300); 424 jtf.setVisible(true); 425 jtf.setLocationRelativeTo(null); 426 427 jtb = new JTextArea(); 428 jtb.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 429 jtf.add(jtb, BorderLayout.CENTER); 430 jtb.setText(clipb); 431 432 JPanel jbp = new JPanel(); 433 JButton jxb = new JButton("修 改"); 434 jxb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 435 jbp.add(jxb); 436 jtf.add(jbp, BorderLayout.SOUTH); 437 438 jxb.addActionListener(new ActionListener(){ 439 public void actionPerformed(ActionEvent e) { 440 clipb = jtb.getText(); 441 JOptionPane.showMessageDialog(null, "修改成功!", "剪贴板", JOptionPane.INFORMATION_MESSAGE); 442 } 443 }); 444 }*/ 445 446 /**使用系统剪贴板*/ 447 //剪切方法 448 //获得系统粘帖板 449 public Clipboard clipBoard = Toolkit.getDefaultToolkit().getSystemClipboard(); 450 public void cutm(){ 451 copym(); 452 ta.replaceRange("",ta.getSelectionStart(),ta.getSelectionEnd()); 453 } 454 455 //复制方法 456 public void copym(){ 457 String text = ta.getSelectedText(); 458 //StringSelection : 实现传输 String 所需能力的 Transferable 459 StringSelection selection=new StringSelection(text); 460 //将剪贴板的当前内容设置到指定的 transferable 对象 461 clipBoard.setContents(selection,null); 462 } 463 464 //粘贴方法 465 public String clipb= null; 466 public void pastem(){ 467 try { 468 //返回表示剪贴板当前内容的 transferable 对象 469 Transferable clipT = clipBoard.getContents(this); 470 if (clipT != null){ 471 // 检查内容是否是文本类型 472 if (clipT.isDataFlavorSupported(DataFlavor.stringFlavor)){ 473 clipb = (String)clipT.getTransferData(DataFlavor.stringFlavor); 474 } 475 }else{ 476 clipb = null; 477 } 478 //将文本中选中的部分替换为剪贴板内容 479 ta.replaceRange(clipb,ta.getSelectionStart(),ta.getSelectionEnd()); 480 } catch (Exception e) { 481 JOptionPane.showMessageDialog(null, 482 e, "错误", JOptionPane.ERROR_MESSAGE); 483 } 484 } 485 486 //剪贴板编辑(*-*)made by feng 487 public JFrame jtf = null; 488 public JTextArea jtb = null; 489 public void clipBm() { 490 jtf = new JFrame("剪贴板"); 491 jtf.setSize(500, 300); 492 jtf.setVisible(true); 493 jtf.setLocationRelativeTo(null); 494 495 jtb = new JTextArea(); 496 jtb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 497 jtf.add(jtb, BorderLayout.CENTER); 498 try { 499 //返回表示剪贴板当前内容的 transferable 对象 500 Transferable clipT = clipBoard.getContents(this); 501 if (clipT != null){ 502 // 检查内容是否是文本类型 503 if (clipT.isDataFlavorSupported(DataFlavor.stringFlavor)){ 504 clipb = (String)clipT.getTransferData(DataFlavor.stringFlavor); 505 } 506 }else{ 507 clipb = null; 508 } 509 } catch (Exception e) { 510 JOptionPane.showMessageDialog(null, 511 e, "错误", JOptionPane.ERROR_MESSAGE); 512 } 513 jtb.setText(clipb); 514 515 JPanel jbp = new JPanel(); 516 JButton jxb = new JButton("修 改"); 517 jxb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 518 jbp.add(jxb); 519 jtf.add(jbp, BorderLayout.SOUTH); 520 521 jxb.addActionListener(new ActionListener(){ 522 public void actionPerformed(ActionEvent e) { 523 clipb = jtb.getText(); 524 StringSelection selection=new StringSelection(jtb.getText()); 525 //获得系统粘帖板 526 clipBoard = Toolkit.getDefaultToolkit().getSystemClipboard(); 527 //将剪贴板的当前内容设置到指定的 transferable 对象 528 clipBoard.setContents(selection,null); 529 JOptionPane.showMessageDialog(null, "修改成功!", "剪贴板", JOptionPane.INFORMATION_MESSAGE); 530 } 531 }); 532 } 533 534 535 //查找方法 536 public JFrame findf = null; 537 public JTextField chai = null; 538 public JLabel ftl = null; 539 public void findm(){ 540 findf = new JFrame("查 找"); 541 findf.setVisible(true); 542 findf.setSize(400, 220); 543 findf.setLocationRelativeTo(null); 544 JPanel fp = new JPanel(); 545 findf.add(fp); 546 Box fbox = Box.createVerticalBox(); 547 fp.add(fbox); 548 549 fbox.add(Box.createVerticalStrut(25)); 550 551 JPanel chap = new JPanel(); 552 chap.setOpaque(false); 553 JLabel chat = new JLabel("查找内容："); 554 chat.setFont(new Font("华文中宋", Font.PLAIN, 18)); 555 chai = new JTextField(15); 556 chai.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 557 chap.add(chat); 558 chap.add(chai); 559 fbox.add(chap); 560 561 fbox.add(Box.createVerticalStrut(15)); 562 563 JPanel fbp = new JPanel(); 564 JButton fsb = new JButton("上一个"); 565 fsb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 566 JLabel fbt = new JLabel(" "); 567 fbt.setFont(new Font("华文中宋", Font.PLAIN, 15)); 568 JButton fxb = new JButton("下一个"); 569 fxb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 570 fbp.add(fsb); 571 fbp.add(fbt); 572 fbp.add(fxb); 573 fbox.add(fbp); 574 575 fbox.add(Box.createVerticalStrut(15)); 576 577 JPanel ftp =new JPanel(); 578 ftp.setOpaque(false); 579 ftl = new JLabel(); 580 ftl.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 581 ftl.setForeground(Color.red); 582 ftp.add(ftl); 583 fbox.add(ftp); 584 585 fsb.addActionListener(new ActionListener(){ 586 public void actionPerformed(ActionEvent e) { 587 finds(); 588 } 589 }); 590 591 fxb.addActionListener(new ActionListener(){ 592 public void actionPerformed(ActionEvent e) { 593 findx(); 594 } 595 }); 596 597 } 598 599 //查找上一处方法 600 public void finds(){ 601 String text = ta.getText(); 602 String findt = chai.getText(); 603 if ("".equals(findt)) { 604 ftl.setText("输入不能为空"); 605 }else{ 606 if (text.indexOf(findt) == -1) { 607 ftl.setText("找不到指定的内容"); 608 } else { 609 int sl = 0; 610 int z = 0; 611 //计算出现次数 612 while (true) { 613 if (text.indexOf(findt, z) != -1) { 614 z = text.indexOf(findt, z) + 1; 615 sl++; 616 } else { 617 break; 618 } 619 } 620 int n = zb - 1; 621 //查找上一处 622 if (text.lastIndexOf(findt, n) != -1) { 623 zb = text.lastIndexOf(findt, n); 624 //设置查找内容处于选中状态 625 ta.setSelectionStart(zb); 626 ta.setSelectionEnd(zb + findt.length()); 627 cs--; 628 ftl.setText("共找到" + sl + "处，第" + cs + "处"); 629 } else { 630 zb = ta.getText().length(); 631 cs = sl + 1; 632 finds(); 633 } 634 } 635 } 636 } 637 638 //查找下一处方法 639 public int zb = 0; 640 public int cs = 0; 641 public void findx(){ 642 String text = ta.getText(); 643 String findt = chai.getText(); 644 if ("".equals(findt)) { 645 ftl.setText("输入不能为空"); 646 }else{ 647 if (text.indexOf(findt) == -1) { 648 ftl.setText("找不到指定的内容"); 649 } else { 650 int sl = 0; 651 int z = 0; 652 //计算出现次数 653 while (true) { 654 if (text.indexOf(findt, z) != -1) { 655 z = text.indexOf(findt, z) + 1; 656 sl++; 657 } else { 658 break; 659 } 660 } 661 int n = zb + 1; 662 //查找下一处 663 if (text.indexOf(findt, n) != -1) { 664 zb = text.indexOf(findt, n); 665 //设置查找内容处于选中状态 666 ta.setSelectionStart(zb); 667 ta.setSelectionEnd(zb + findt.length()); 668 cs++; 669 ftl.setText("共找到" + sl + "处，第" + cs + "处"); 670 } else { 671 zb = -1; 672 cs = 0; 673 findx(); 674 } 675 } 676 } 677 } 678 679 //替换方法 680 public JFrame repf = null; 681 public JTextField rfsi = null; 682 public JTextField rrsi = null; 683 public JLabel rtl = null; 684 public void replacem(){ 685 repf = new JFrame("替 换"); 686 repf.setVisible(true); 687 repf.setSize(400, 280); 688 repf.setLocationRelativeTo(null); 689 JPanel rp = new JPanel(); 690 repf.add(rp); 691 Box rbox = Box.createVerticalBox(); 692 rp.add(rbox); 693 694 rbox.add(Box.createVerticalStrut(30)); 695 696 JPanel rfp = new JPanel(); 697 rfp.setOpaque(false); 698 JLabel rft = new JLabel(" 查 找 ："); 699 rft.setFont(new Font("华文中宋", Font.PLAIN, 20)); 700 rfsi = new JTextField(8); 701 rfsi.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 702 rfsi.setText(ta.getSelectedText()); 703 rfp.add(rft); 704 rfp.add(rfsi); 705 rbox.add(rfp); 706 707 JPanel rrp = new JPanel(); 708 JLabel rrt = new JLabel("替换为："); 709 rrt.setFont(new Font("华文中宋", Font.PLAIN, 20)); 710 rrsi = new JTextField(8); 711 rrsi.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 712 rrp.add(rrt); 713 rrp.add(rrsi); 714 rbox.add(rrp); 715 rrsi.requestFocus(); 716 717 rbox.add(Box.createVerticalStrut(20)); 718 719 JPanel rbp =new JPanel(); 720 rbp.setOpaque(false); 721 JButton rxb = new JButton("下一个"); 722 rxb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 723 rbp.add(rxb); 724 JLabel rbt = new JLabel(" "); 725 rbt.setFont(new Font("华文中宋", Font.PLAIN, 15)); 726 rbp.add(rbt); 727 JButton rtb = new JButton("替 换"); 728 rtb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 729 rbp.add(rtb); 730 JLabel rbt1 = new JLabel(" "); 731 rbt1.setFont(new Font("华文中宋", Font.PLAIN, 15)); 732 rbp.add(rbt1); 733 JButton rqb = new JButton("全部替换"); 734 rqb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 735 rbp.add(rqb); 736 rbox.add(rbp); 737 738 rbox.add(Box.createVerticalStrut(20)); 739 740 JPanel rtp =new JPanel(); 741 rtp.setOpaque(false); 742 rtl = new JLabel(); 743 rtl.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 744 rtp.add(rtl); 745 rbox.add(rtp); 746 747 rxb.addActionListener(new ActionListener(){ 748 public void actionPerformed(ActionEvent e) { 749 rfind(); 750 } 751 }); 752 753 rtb.addActionListener(new ActionListener(){ 754 public void actionPerformed(ActionEvent e) { 755 String text = ta.getSelectedText(); 756 if(text == null){ 757 rtl.setText("未查找到内容"); 758 }else{ 759 ta.replaceRange(rrsi.getText(), ta.getSelectionStart(), ta.getSelectionEnd()); 760 rtl.setText("替换完成"); 761 } 762 } 763 }); 764 765 rqb.addActionListener(new ActionListener(){ 766 public void actionPerformed(ActionEvent e) { 767 String t = ta.getText(); 768 t = t.replace(rfsi.getText(), rrsi.getText()); 769 ta.setText(t); 770 JOptionPane.showMessageDialog(null, "替换完成!", "全部替换", JOptionPane.INFORMATION_MESSAGE); 771 } 772 }); 773 } 774 775 //替换中的查找方法 776 public void rfind(){ 777 String text = ta.getText(); 778 String findt = rfsi.getText(); 779 if ("".equals(findt)) { 780 rtl.setText("输入不能为空"); 781 }else{ 782 if (text.indexOf(findt) == -1) { 783 rtl.setText("找不到指定的内容"); 784 } else { 785 int sl = 0; 786 int z = 0; 787 //计算出现次数 788 while (true) { 789 if (text.indexOf(findt, z) != -1) { 790 z = text.indexOf(findt, z) + 1; 791 sl++; 792 } else { 793 break; 794 } 795 } 796 int n = zb + 1; 797 //查找下一处 798 if (text.indexOf(findt, n) != -1) { 799 zb = text.indexOf(findt, n); 800 //设置查找内容处于选中状态 801 ta.setSelectionStart(zb); 802 ta.setSelectionEnd(zb + findt.length()); 803 cs++; 804 rtl.setText("共找到" + sl + "处，第" + cs + "处"); 805 } else { 806 zb = -1; 807 cs = 0; 808 rfind(); 809 } 810 } 811 } 812 } 813 814 //字体方法《楓~》 815 public JFrame fontf = null; 816 public JTextField fzsi = null; 817 public JTextField fdsi = null; 818 public String zt = "华文中宋"; 819 public int zh = 20; 820 public JRadioButton zxp = null; 821 public JRadioButton zxb = null; 822 public JLabel fztt = null; 823 public void fontm(){ 824 fontf = new JFrame("字体"); 825 fontf.setVisible(true); 826 fontf.setSize(400, 400); 827 fontf.setLocationRelativeTo(null); 828 JPanel fp = new JPanel(); 829 fontf.add(fp); 830 Box fbox = Box.createVerticalBox(); 831 fp.add(fbox); 832 833 fbox.add(Box.createVerticalStrut(30)); 834 835 JPanel fzp = new JPanel(); 836 fzp.setOpaque(false); 837 JLabel fzt = new JLabel(" 字 体 ："); 838 fzt.setFont(new Font("华文中宋", Font.PLAIN, 20)); 839 fzsi = new JTextField(8); 840 fzsi.setText(zt); 841 fzsi.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 842 fzp.add(fzt); 843 fzp.add(fzsi); 844 fbox.add(fzp); 845 846 JPanel fdp = new JPanel(); 847 JLabel fdt = new JLabel(" 字 号 ："); 848 fdt.setFont(new Font("华文中宋", Font.PLAIN, 20)); 849 fdsi = new JTextField(8); 850 fdsi.setText(zh + ""); 851 fdsi.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 852 fdp.add(fdt); 853 fdp.add(fdsi); 854 fbox.add(fdp); 855 856 JPanel fzxp = new JPanel(); 857 fzxp.setOpaque(false); 858 JLabel fzxt = new JLabel(" 字 型 ："); 859 fzxt.setFont(new Font("华文中宋", Font.PLAIN, 20)); 860 zxp = new JRadioButton("常 规", true); 861 zxp.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 862 zxb = new JRadioButton("加 粗", false); 863 zxb.setFont(new Font("微软雅黑", Font.PLAIN, 18)); 864 ButtonGroup zxg = new ButtonGroup(); 865 zxg.add(zxp); 866 zxg.add(zxb); 867 fzxp.add(fzxt); 868 fzxp.add(zxp); 869 fzxp.add(zxb); 870 fbox.add(fzxp); 871 872 fbox.add(Box.createVerticalStrut(20)); 873 874 JPanel fbp =new JPanel(); 875 fbp.setOpaque(false); 876 JButton fqb = new JButton("确 认"); 877 fqb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 878 fbp.add(fqb); 879 JLabel fbt = new JLabel(" "); 880 fbt.setFont(new Font("华文中宋", Font.PLAIN, 15)); 881 fbp.add(fbt); 882 JButton ffb = new JButton("重 置"); 883 ffb.setFont(new Font("微软雅黑", Font.PLAIN, 15)); 884 fbp.add(ffb); 885 fbox.add(fbp); 886 887 fbox.add(Box.createVerticalStrut(20)); 888 889 JPanel ftsp =new JPanel(); 890 ftsp.setOpaque(false); 891 fztt = new JLabel("示例： "); 892 fztt.setFont(new Font("华文中宋", Font.PLAIN, 18)); 893 ftsp.add(fztt); 894 fbox.add(ftsp); 895 896 fbox.add(Box.createVerticalStrut(5)); 897 898 JPanel ftp =new JPanel(); 899 ftp.setOpaque(false); 900 fztt = new JLabel("Made by 枫~"); 901 fztt.setFont(new Font(zt, Font.PLAIN, zh)); 902 ftp.add(fztt); 903 fbox.add(ftp); 904 905 //监听 906 fqb.addActionListener(new ActionListener(){ 907 public void actionPerformed(ActionEvent e) { 908 zt = fzsi.getText(); 909 zh = Integer.valueOf(fdsi.getText()); 910 if(zxp.isSelected()){ 911 fztt.setFont(new Font(zt, Font.PLAIN, zh)); 912 ta.setFont(new Font(zt, Font.PLAIN, zh)); 913 }else{ 914 fztt.setFont(new Font(zt, Font.BOLD, zh)); 915 ta.setFont(new Font(zt, Font.BOLD, zh)); 916 } 917 } 918 }); 919 920 ffb.addActionListener(new ActionListener(){ 921 public void actionPerformed(ActionEvent e) { 922 zt = "华文中宋"; 923 zh = 20; 924 fzsi.setText(zt); 925 fdsi.setText(zh + ""); 926 zxp.setSelected(true); 927 fztt.setFont(new Font(zt, Font.PLAIN, zh)); 928 ta.setFont(new Font(zt, Font.PLAIN, zh)); 929 } 930 }); 931 } 932 933 //自动换行方法 934 public int h = 0; 935 public void linewm(){ 936 if(h == 0){ 937 ta.setLineWrap(true); 938 linew.setText("自动换行 √"); 939 h = 1; 940 }else{ 941 ta.setLineWrap(false); 942 linew.setText("自动换行 ×"); 943 h = 0; 944 } 945 } 946 947 }
