Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "^(\\d{1,3}) .+ (\\d{1,3})$"; final String string = "1 France Inter 20 715 889 24 273 500 13 810 922 34m 08s 1\n" + "2 RMC 17 180 433 19 752 536 10 526 607 31m 59s 1\n" + "3 NRJ 15 516 303 24 951 582 14 132 481 33m 59s 616\n" + "4 France Info 8 937 976 12 289 702 5 593 152 27m 18s 1\n" + "5 FIP 7 133 107 9 699 359 9 845 186 1h 00m 54s 11\n" + "6 Nostalgie 6 970 630 9 452 571 7 978 721 50m 39s 75\n" + "7 Skyrock 6 311 504 7 364 101 2 958 348 24m 06s 11\n" + "8 Chérie FM 6 207 971 8 411 056 7 471 224 53m 18s 79\n" + "9 France Culture 5 715 325 7 137 407 2 758 059 23m 11s 1\n" + "10 Rire et Chansons 4 858 398 5 936 229 3 190 343 32m 15s 25\n" + "11 France Bleu 3 744 498 4 235 114 3 083 072 43m 41s 45\n" + "12 Oui FM 2 678 447 3 066 253 2 305 722 45m 07s 20\n" + "13 Radio Public Sante 2 421 619 2 424 740 180 762 04m 28s 8\n" + "14 Radio Classique 2 081 495 2 568 342 2 339 576 54m 39s 1\n" + "15 France Musique 1 631 388 2 142 822 1 514 065 42m 24s 8\n" + "16 Radio Meuh 1 444 456 1 735 126 1 955 028 1h 07m 36s 1\n" + "17 Jazz Radio 1 296 883 2 232 240 1 823 211 49m 00s 30\n" + "18 Radio FG 1 268 787 1 723 771 1 546 692 53m 50s 8\n" + "19 M Radio 1 243 368 1 435 268 982 991 41m 06s 21\n" + "20 Latina 1 234 321 1 548 546 823 327 31m 54s 8\n" + "21 Radio Nova 1 146 752 1 439 584 1 266 673 52m 48s 5\n" + "22 Djam Radio 1 061 059 1 332 371 824 642 37m 08s 1\n" + "23 Chante France 1 036 497 1 484 925 1 083 948 43m 48s 7\n" + "24 Hotmixradio 1 012 057 3 556 711 2 185 403 36m 52s 20\n" + "25 BFM Business 994 745 1 290 789 707 847 32m 54s 1\n" + "26 Générations 968 303 1 317 853 491 625 22m 23s 28\n" + "27 Mouv 886 328 1 003 387 466 052 27m 52s 7\n" + "28 Outre-Mer la 1ère 636 343 695 384 344 918 29m 46s 10\n" + "29 TSF Jazz 615 188 855 646 835 809 58m 37s 1\n" + "30 Radio Scoop 554 268 608 459 407 005 40m 08s 19\n" + "31 Sud Radio 515 576 593 386 319 693 32m 20s 1\n" + "32 Tropiques 468 281 496 499 272 790 32m 58s 6\n" + "33 Alouette 429 218 479 216 365 439 45m 45s 2\n" + "34 Voltage 418 581 505 578 264 571 31m 24s 9\n" + "35 Vibration 397 046 458 878 267 638 35m 00s 10\n" + "36 HItwest 357 319 390 501 360 035 55m 19s 3\n" + "37 Beur FM 329 434 460 259 126 455 16m 29s 1\n" + "38 Allzic 303 841 572 798 421 020 44m 06s 56\n" + "39 Contact FM 291 186 325 642 253 455 46m 42s 1\n" + "40 Top Music 278 818 322 765 320 289 59m 32s 1\n" + "41 Evasion 266 087 289 990 267 630 55m 22s 1\n" + "42 Swigg * 257 019 312 769 92 619 17m 46s 11\n" + "43 100% 255 271 324 096 240 839 44m 35s 6\n" + "44 Radio Bonheur 250 947 321 292 222 426 41m 32s 1\n" + "45 Bien Etre animal 246 007 246 030 11 163 02m 43s 1\n" + "46 Wit FM 244 992 277 388 159 541 34m 31s 10\n" + "47 Champagne FM 227 003 245 636 170 703 41m 42s 1\n" + "48 Replay News 205 278 206 073 6 617 01m 56s 1\n" + "49 Maritima 180 281 185 693 43 114 13m 56s 1\n" + "50 Radio Mélodie 174 841 204 867 198 426 58m 07s 2\n" + "51 Radio Pomme d'Api 171 118 209 135 133 074 38m 11s 1\n" + "52 France Maghreb 2 163 365 261 861 78 133 17m 54s 1\n" + "53 Metropolys 156 542 172 463 221 723 1h 17m 08s 5\n" + "54 Africa 144 223 409 836 126 360 18m 30s 7\n" + "55 Tendance ouest 144 002 167 886 163 257 58m 21s 6\n" + "56 Urban Hit 140 412 227 337 75 468 19m 55s 7\n" + "57 Radio Dreyeckland 132 434 156 076 143 591 55m 12s 5\n" + "58 Magnum La Radio 129 171 136 689 124 777 54m 46s 1\n" + "59 Kiss FM 112 876 168 535 133 025 47m 21s 4\n" + "60 Delta FM 105 060 117 017 110 846 56m 50s 1\n" + "61 Radio isa 102 101 109 297 68 957 37m 51s 1\n" + "62 Totem 93 911 101 285 81 368 48m 12s 1\n" + "63 Forum 84 515 104 104 67 951 39m 10s 9\n" + "64 Horizon Radio 82 240 87 601 72 733 49m 49s 1\n" + "65 Blackbox * 78 731 117 284 34 220 17m 30s 12\n" + "66 Radio Espace 77 651 97 714 52 541 32m 16s 5\n" + "67 Virage Radio 77 621 99 800 63 411 38m 07s 5\n" + "68 Radio Cristal 76 890 81 977 57 613 42m 10s 1\n" + "69 Toulouse Fm 72 924 83 889 67 724 48m 26s 3\n" + "70 Radio Médecine Douce 72 064 83 934 29 301 20m 57s 1\n" + "71 Radio 6 71 276 81 532 79 535 58m 32s 1\n" + "72 Radio Star 71 198 80 609 44 895 33m 25s 5\n" + "73 RTS 70 411 78 340 69 142 52m 57s 3\n" + "74 Jordanne FM 63 734 75 496 68 095 54m 07s 1\n" + "75 Melody Vintage Radio 63 235 77 952 52 218 40m 12s 1\n" + "76 RDL 63 075 70 884 66 696 56m 27s 1\n" + "77 La Radio Plus 57 033 112 816 58 375 31m 03s 4\n" + "78 Radio Emotion 53 093 72 516 65 094 53m 52s 3\n" + "79 ODS la radio 52 041 61 145 49 353 48m 26s 2\n" + "80 Mona fm 51 082 59 956 64 469 1h 04m 31s 1\n" + "81 ABC Lounge 49 182 220 272 358 520 1h 37m 39s 1\n" + "82 Generation Soul Disco Funk 48 009 182 509 139 471 45m 51s 1\n" + "83 Direct fm 47 762 54 986 39 305 42m 53s 1\n" + "84 ABC Dance Radios 46 157 242 544 56 739 14m 02s 6\n" + "85 MBS 45 708 48 683 47 429 58m 27s 1\n" + "86 Cannes Radio 45 006 69 588 52 358 45m 09s 2\n" + "87 Est FM 41 972 45 627 48 279 1h 03m 29s 1\n" + "88 Océane FM 41 073 48 925 40 965 50m 14s 1\n" + "89 Alpes 1 36 716 49 146 35 461 43m 18s 1\n" + "90 Fréquence Plus 36 487 41 077 28 581 41m 45s 1\n" + "91 Radio mont blanc 35 648 46 891 38 660 49m 28s 1\n" + "92 Lor FM 35 293 41 678 37 771 54m 23s 1\n" + "93 Mixx fm 34 140 36 251 20 139 33m 20s 1\n" + "94 N radio 33 858 36 460 33 735 55m 31s 1\n" + "95 Radio Mozart 28 988 97 921 57 309 35m 07s 1\n" + "96 Radio numero 1 28 465 31 972 20 918 39m 15s 1\n" + "97 Gold fm 27 001 32 114 15 656 29m 15s 1\n" + "98 Cerise FM 23 954 30 114 22 868 45m 34s 2\n" + "99 K6FM 23 072 25 195 19 178 45m 40s 1\n" + "100 Activ Radio 22 783 29 331 24 330 49m 46s 1\n" + "101 Lovely 20 286 24 341 16 402 40m 26s 1\n" + "102 Radio 8 18 994 21 994 16 595 45m 16s 1\n" + "103 Oxygene Radio 18 013 21 108 18 825 53m 31s 1\n" + "104 Radio One 17 442 20 878 16 926 48m 39s 1\n" + "105 Lyon 1ère 16 667 23 589 10 399 26m 27s 1\n" + "106 47fm 15 998 20 356 16 127 47m 32s 1\n" + "107 Latitude 15 241 17 578 11 587 39m 33s 1\n" + "108 Happy fm 14 189 19 196 9 852 30m 48s 1\n" + "109 ECN 12 298 18 596 15 970 51m 32s 1\n" + "110 Radio Menergy 11 725 13 228 10 647 48m 18s 1\n" + "111 RJM Radios 11 699 45 931 31 503 41m 09s 7\n" + "112 Jaime Radio 8 226 9 266 7 691 49m 48s 1\n" + "113 Radio VFM 7 179 9 756 7 711 47m 26s 1\n" + "114 Fréquence Grand Lacs 6 850 10 781 8 797 48m 58s 1\n" + "115 Grand Sud FM 6 625 8 990 6 652 44m 24s 1\n" + "116 Durance FM 6 173 7 650 5 680 44m 33s 1\n" + "117 Babymixradio 5 905 12 621 10 055 47m 48s 1\n" + "118 Ambient and Lounge 4 809 11 725 12 271 1h 02m 48s 1\n" + "119 Viv radio 3 608 4 280 3 160 44m 18s 1\n" + "120 1000 Hits Sweet Radio 2 668 22 927 27 312 1h 11m 29s 1\n" + "121 Radio Junior 194 295 101 20m 36s 1\n"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); while (matcher.find()) { System.out.println("Full match: " + matcher.group(0)); for (int i = 1; i <= matcher.groupCount(); i++) { System.out.println("Group " + i + ": " + matcher.group(i)); } } } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html