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 = "((?i)(Jair .*bolsonaro)|(bolsonaro)|(presidente .*bolsonaro)|(bilonaro)|(biroliro)|(biroslau)|(biroslini)|(biruleibes)|(bobonaro)|(bolno)|(bololaro)|(bolonaro)|(bolossauro)|(bolovo)|(bolro)|(bolso)|(bolsoanta)|(bolsobitch)|(bolsobostão)|(bolsolini)|(bolsonabo)|(bolzonóquio)|(bolzy)|(bonobo)|(boslo)|(bostonauro)|(bostossauro)|(bozolino)|(bozonabo)|(bubobauro)|(burronaro)|(capetão)|(chihuahua do Trump)|(coisa)|(coiso)|(frouxonaro)|(javier Bolsossauro)|(nalbossauro)|(salnorabo)|(silvonaro)|(soldado Bizonho)|(solnorabo)|(bolsonazi))"; final String string = "jair bolsonaro\n" + "jair messisas bolsonaro\n" + "bolsonaro\n" + "presidente jair bolsonaro\n" + "presidente jair messias bolsonaro\n" + "JAIR bolsonaro\n" + "Boldo\n" + "Bilonaro\n" + "Biroliro\n" + "Biroslau\n" + "Biroslini\n" + "Biruleibes\n" + "Bobonaro\n" + "Bolno\n" + "Bololaro\n" + "Bolonaro\n" + "Bolossauro\n" + "Bolovo\n" + "Bolro\n" + "Bolso\n" + "Bolsoanta\n" + "Bolsobitch\n" + "Bolsobostão\n" + "Bolsolini\n" + "Bolsonabo\n" + "bolsonazi\n" + "Bolzonóquio\n" + "Bolzy\n" + "Bonobo\n" + "Boslo\n" + "Bostonauro\n" + "Bostossauro\n" + "Bozolino\n" + "Bozonabo\n" + "Bubobauro\n" + "Burronaro\n" + "Capetão\n" + "Chihuahua do Trump\n" + "Coisa\n" + "Coiso\n" + "Frouxonaro\n" + "Javier Bolsossauro\n" + "Nalbossauro\n" + "Salnorabo\n" + "Silvonaro\n" + "Soldado Bizonho\n" + "Solnorabo"; 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