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
Processing...

Test String

Code Generator

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "[^_]+(?=\\.html)"; final String string = "'\"IIIIIIIIIIIIiIIIIIITIIiIIIIIfiI° W‘i’\n" + "INVOICE TO KN SALES INVOICE\n" + "BROSE SPARTANBURG , INC.\n" + "1171 HOWELL ROAD KN TRACKING NUMBER 1036 303 978\n" + "STE.300 KN ACCOUNTING NO. 1036303978—2160\n" + "DUNCAN SC 29334 ACCOUNT NUMBER 8416043\n" + "UNITED STATES INVOICE NO. / DATE GSPN790430 02/01/2021\n" + "DUE DATE 03/03/2021\n" + "CONSIGNEE SHIPPER\n" + "BROSE SPARTANBURG , INC. KUEHNE + NAGEL (AG & CO.) KG\n" + "1171 HOWELL ROAD FS\n" + "STE.300 WILHELM-KAISEN-BRUECKE 1\n" + "DUNCAN SC 29334 28195 BREMEN\n" + "UNITED STATES GERMANY\n" + "__\n" + "VESSEL NAME : AL BAHIA VOYAGE NUMBER : 012W\n" + "PL. OF RECEIPT : KRONACH MOVEMENT TYPE : CFS/CY\n" + "P. OF LOADING : HAMBURG ETD/ATD : 12/30/2020\n" + "P. OF DISCHARGE : CHARLESTON, SC ETA/ATA : 01/18/2021\n" + "PL. OF DELIVERY : DUNCAN DANGEROUS GOODS : NO\n" + "TERMS OF TRADE : CFR DUNCAN INSURAN. STATUS : NOT ARRANGED BY KN\n" + "MARKS & NOS QTY TYPE DESCRIPTION OF GOODS WGHT VOL\n" + "1 40' HC AS PER AHTWEHED 10749.00 56.100\n" + "CODE CHARGE NAME USD\n" + "156 PRECARRIAGE 880.60\n" + "300 EXPORT CUSTOMS CLEARANCE 41.65\n" + "340 VGM FEE 15.00\n" + "400 THC - ORIGIN 357.00\n" + "550 SEAFREIGHT 1,561.00\n" + "581 AMS/ACI SECURITY FEE 45.00\n" + "570 BUC - BUNKER CHARGE 347.68\n" + "600 THC - DESTINATION 80.00\n" + "406 CONTAINER STUFFING EXPORT 426.16\n" + "SUBTOTAL USD 3,754.09\n" + "INVOICE TOTAL USD 3,754.09\n" + "g PAYABLE\n" + "BE CTD NUMBER: HLCUEUR2011DRZW7\n" + "fig AMS NUMBER: BANQBRE4631801\n" + "«'2\n" + "fig THE SHIPMENT IS EMITTING 2020.00 KGM KGS OF CO2 FROM KRONACH TO DUNCAN, SC.\n" + "Egg THE VALUE IS ESTIMATED BASED ON CLEAN CARGO AND EN 16258 METHODOLOGIES.\n" + "0X0;\n" + "2.5011\n" + "'13:\n" + "933\n" + "§§§ IEEE'SERF'IEAPDEWCS DR SUITE #EIé-11((886é1)8g79é-112§216 RemmmEIIfionguiIIyoaBQIeéa'BT Kuehne + Na el Inc\n" + "§§§ GREENV'LLE: SC 29507 .. maggppgéflfiectfiggflss ABA-021000089 SWIFT: cmusaa DEBRA (gRREfi—\n" + "32%\n" + "£55 KMSTDWSUS 00034887002021-02-01T12:43250.596052008AUSNIULTT"; 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