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 = "(?:[cC][hH]|[lL][lL]|[rR][rR]|[qQ][uU]|[mnñvzsyjhxwMNÑVZSYJHXW]|[fpbtdkgcFPBTDKGC][lrLR]?|[lrLR])?(?:[iuüIUÜ][eaoéáóEAOÉÁÓ][iyuIYU]|[aáAÁ][hH]?[uúUÚ][aáAÁ]|[iuüIUÜ][hH]?[eaoéáóEAOÉÁÓ]|[eaoéáóEAOÉÁÓ][hH]?[iyuIYU]|[iíIÍ][hH]?[uúUÚ]|[uúüUÚÜ][hH]?[iíyIÍY]|[ieaouíéáóúüIEAOUÍÉÁÓÚÜ])(?:(?:(?:(?:[nmNM]|[rR](?![rR]))s?(?![ieaouíéáóúüIEAOUÍÉÁÓÚÜ]))|(?:(?:[mnñvzsyjhxwMNÑVZSYJHXW]|[lL](?![lL]))(?![ieaouíéáóúüIEAOUÍÉÁÓÚÜ]))|(?:(?:[fpbtdkgFPBTDKG]|[cC](?![hH]))(?![lrLR]?[ieaouíéáóúüIEAOUÍÉÁÓÚÜ])))(?!\\s|$))?(?:[ndrlsxNDRLSX](?=\\s|$))?"; final String string = "SÍLABA CV\n" + " casado\n" + " caro\n\n" + "NÚCLEOS VOCÁLICOS\n" + " DIPTONGOS\n" + " ai, au, ei, eu, oi, ou, ui, iu, ia, ua, ie, ue, io, uo\n" + " varió comió diario miel\n\n" + " CON DOS CERRADAS\n" + " distribuido atribuir atribuí\n" + " muy fui rey\n" + " pausa tierra\n" + " ciudad buitre \n\n" + " CON H INTERCALADA\n" + " desahuciar, ahijado\n\n" + " TRIPTONGOS\n" + " santigüeis\n" + " guay guau rey\n" + " haliéutica hioides huaico\n\n" + " AUA\n" + " palauano\n" + " nahuatl cacahuatal\n\n" + " HIATOS NORMATIVOS (DOS CONSONANTES ABIERTAS)\n" + " aorta\n" + " héroe\n" + " almohada\n" + " línea\n\n" + " HIATOS\n" + " tú sabrías, sabías, vosotros sabíais\n" + " raúl oído búho\n" + " tío púa \n\n" + "ATAQUE C+LÍQUIDA\n" + " cromo\n" + " claro\n" + " cabra\n" + " triple\n" + " dígrafos \n\n\n" + "CODAS\n" + " silbo\n" + " cansado\n" + " tacto\n" + " texto\n" + " anticiparse\n" + " álbumes\n" + " asfixia\n" + " enloquecer\n\n" + " SUCESIÓN NS MS RS\n" + " transportar\n" + " transacción\n" + " torso\n" + " perspectivas\n" + " samsara \n\n" + " CODAS A FINAL DE PALABRA\n" + " hablan hablar hablad\n" + " riel rieles\n" + " sílex\n" + " recto\n\n" + "DÍGRAFOS\n" + " chica\n" + " coche\n" + " llave\n" + " calle\n" + " carro\n\n" + "EXTRANJERISMOS\n" + " pícnic\n" + " hámster\n" + " mozzarella\n" + " marketing\n" + " búnker\n" + " sándwich\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