Regular Expressions 101

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  • Unit Tests (1)

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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 = "([0-9]{1,2}[\\/][0-9]{1,2}[\\/][0-9]{1,4}) ([0-9]{1,2}:[0-9]{1,2}) - ([a-z0-9 \\S]+?:)([a-z0-9 \\S]+?\\n)"; final String string = "25/03/2017 09:32 - ‎Diego Rhoger criou o grupo \"CerradoValley\"\n" + "27/04/2017 15:42 - Você entrou usando o link de convite deste grupo\n" + "27/04/2017 15:43 - +55 61 9332-2990: Valeu 👍🏻\n" + "27/04/2017 15:43 - Fabiano S Figueiredo: 🙃👍\n" + "27/04/2017 15:43 - ‎Dartagnan Sabino Antunes Oliveira entrou usando o link de convite deste grupo\n" + "27/04/2017 15:44 - Fabiano S Figueiredo: e aí gente, tudo bem?\n" + "27/04/2017 15:44 - Fabiano S Figueiredo: Onde e como saber quem é quem? :D\n" + "27/04/2017 15:44 - +55 61 9332-2990: No decorrer das conversas vc vai conhecendo o pessoal rs\n" + "27/04/2017 15:45 - Fabiano S Figueiredo: né? :)\n" + "27/04/2017 15:45 - +55 61 9869-0018: é a única forma\n" + "27/04/2017 15:45 - +55 61 9869-0018: e ir aos meetups da vida\n" + "27/04/2017 15:46 - Fabiano S Figueiredo: Jóia. E normalmente o que é discutido aqui?\n" + "27/04/2017 15:55 - +55 61 9332-2990: Discutimos sobre mercado, economia, startups, comportamento empreendedor\n" + "27/04/2017 15:55 - +55 61 9332-2990: E as vezes a gente se espanca em assuntos de religiao e política\n" + "27/04/2017 15:55 - +55 61 9332-2990: As tudo fica bem depois\n" + "27/04/2017 15:56 - Fabiano S Figueiredo: Massa!!\n" + "27/04/2017 15:56 - +55 61 9332-2990: @556181302875 apresenta aí sua startup cara com poucas palavras\n" + "27/04/2017 15:56 - Fabiano S Figueiredo: Legal!!\n" + "27/04/2017 15:56 - +55 61 9332-2990: E manda o vídeo tbm rs\n" + "27/04/2017 15:56 - +55 61 9332-2990: Bota aí pra colher a opinião da gakera\n" + "27/04/2017 15:57 - +55 61 9332-2990: A minha vc já tem 👍🏻\n" + "27/04/2017 15:57 - Fabiano S Figueiredo: Qual é a do Vídeo?\n" + "27/04/2017 15:57 - +55 61 9332-2990: É pro @556181302875 rs\n" + "27/04/2017 15:57 - Fabiano S Figueiredo: Ahh!! ups!\n" + "27/04/2017 16:01 - Dartagnan Sabino Antunes Oliveira: Boa tarde Galera! Sou o Dartagnan, analista e desenvolvedor de sistemas.\n\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