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

/
/
g

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{2}"; final String string = "http://regexr.com\n" + " \n" + " \n" + "Welcome to RegExr v2.1 by gskinner.com, proudly hosted by Media Temple!\n\n" + "Edit the Expression & Text to see matches. Roll over – matches – or the expression for details. Undo mistakes with cmd-z. Save  Favorites & Share $33 expressions with «friends or the Community. Explore your results with Tools. A full Reference & Help is available $2 in the Library, or watch the video Tutorial.\n\n" + "année 201, années 1969 à 1974, – anné 2015, mois 2013\n" + " \n" + "Voici un -deuxième- paragraphe, avec – ÉT “retour” « régulier ».\n" + "Une clause clause inefficace suivi d’une autre clause.\n" + "La suite du texte se — poursuit toujours — normalement.\n\n" + "Voici un autre paragraphe avec un retour forcé (shift return).\n" + "Nous verrons comment les GREP saisiront cette donnée.\n\n" + "Les GREPs sont intégrés dans ces 2 applications — InDesign et Dreamweaver!\n" + "InDesign,InDesign 2.0, “InDesign CS” and InDesign CS2\n" + "The quick brown fox jumps up and down.\n" + "abc abc abc abc\n" + "BONJOUR SOLEIL.\n" + " \n" + " Tot, tot, Toto, toto, totoo, totoooo, tatoo, tato, teratatotinotto\n\n" + "•          $22.999, 23,99$, 19.99 $\n" + "$2.99, 22,99$, 2,99$, 2,99 $\n" + "2.53%, 20%\n" + "1.89L, 1,89 L — 2 pour 1$\n" + "514-123-4567 \n" + "•  h4N 1X7\n" + "• h8t\n" + "•                      h4N1X72                      Ajout code postal\n" + "•          h8T\n" + "mot à trouver\n" + "Charles ixv\n" + "1/3, 234/56\n" + " \n" + "12h22, 12:00, 12am, 12 pm, 11h30 am, 8 PM, 6H15, 08:00, 6.00 pm\n" + "année 2017, années 1970 à 1974, anné 2016, mois 2014\n" + "22/11/2016, 01-08-2017, 01|02|2015, 20.12.2014, 2/3/2012\n" + " \n" + "Sample text for testing:\n" + "SAMPLE\n" + "abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ\n\n" + "0123456789 _+-.,!@#$%^&*();\\/|<>”’\n" + "12345 -98.7 3.141 .6180 9,000 +42\n" + "1234 - 5678, 1234  -  1234\n" + "3oF, -10oC\n" + " \n" + "555.123.4567   +1-(800)-555-2468\n" + "(123)-(456)-(7890)\n" + "(xxx (xxx) xxxxx (xx) xxx)\n" + "foo@demo.net   bar.ba@test.co.uk\n" + "good4you@yummy.com\n" + "somebody@somewhere.ca, another.somebody@coucouland.com\n" + "www.demo.com   http://foo.co.uk/\n" + "http://regexr.com/foo.html?q=bar\n" + "https://mediatemple.netx\n" + " \n" + "76 g ou/or 85 g\n" + " 22,99 ch./ ea.\n" + "22.99\n" + "222,22\n" + "2,222\n" + "22,222 22,\n" + ",11,\n" + "22,22$\n" + "22,22 $\n" + "195 ml, 273 ml ou/or 198 g \n" + "1 $\n"; final Pattern pattern = Pattern.compile(regex); 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