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

/
/
gm

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 = ".*SA.*CV"; final String string = "MEGA ZAPATO SA DE CV\n" + "ALBERTO ESTEBAN MEZA SOL\n" + "NET & SERVICES TRANTOR SA DE CV\n" + "LAURA YADIRA CEJA PEREZ\n" + "CUAUHTEMOC MERCADO BELTRAN\n" + "OPERADORA BRASILEÑA SA DE CV\n" + "JAIME ALDAIR ROBLES PEREZ\n" + "TIENDAS HR SA DE CV\n" + "SMARTIUM ACADEMIC GROUP SA DE CV\n" + "LA ESPERANZA Y MAS SPR DE RL DE CV\n" + "MANUFACTURAS PROINSE S.A DE CV\n" + "MAURICIO SANCHEZ GOMEZ\n" + "LUIS GERARDO HERNANDEZ ESPINOSA\n" + "IMPORTADORA SAMEX SA DE CV\n" + "PETROTEKNO SA DE CV\n" + "CONDOTEL B NAYAR SA DE CV\n" + "GTRES GRUPO EMPRESARIAL SA DE CV\n" + "GRUPO INDUSTRIAL RIO RICO S DE RL DE CV\n" + "GERARDO GONZALEZ TORRES\n" + "ALEJANDRA PASILLAS PERPULY\n" + "GRUPO LARA VILLALOBOS SA DE CV\n" + "CONSTRUCTORA RAFEGA SA DE CV\n" + "DIEGO ARTURO HERNANDEZ GARCIA\n" + "RECICLADOS DRAGON SA DE CV\n" + "AGRO-IPSA SA DE CV\n" + "LOS CUES INMOBILIARIA SA DE CV\n" + "ILERICSA SA DE CV\n" + "JAVIER ESTRADA SALGADO\n" + "JESUS HUMBERTO HERNANDEZ SEGUNDO\n" + "TRANSPORTE DE PERSONAL ESPECIALIZADO SA DE CV\n" + "IF VERTICAL 2 SAPI DE CV\n" + "CIMEIRA S DE RL DE CV\n" + "MANAVIL COMERCIALIZADORA SA DE CV\n" + "BS DE MEXICO SA DE CV\n" + "ARRENDADORA AUTOMOTRIZ HERMES SA DE CV\n" + "GD TRAILERS SA DE CV\n" + "AVACOR SA DE CV\n" + "EFICIENCIA EN SISTEMAS DE ENERGIA RENOVABLE DEL CENTRO SA DE CV\n" + "KP EXTRUSION DE MEXICO SA DE CV\n" + "SISTEMAS DE CARGA ESPECIALIZADA SA DE CV\n" + "ARRENDADORA AUTOMOTRIZ HERMES SA DE CV\n" + "SUFERRE DEL BAJIO SA DE CV\n" + "SETRIC BEST S DE RL DE CV\n" + "AMD MAQUINARIA SA DE CV\n" + "MODULAR VANITY TOPS SA DE CV\n" + "MII MAVI SA DE CV\n" + "CONSTRUSERVICIOS ESL SA DE CV\n" + "ANDALUCIA CLINICA DE ESPECIALIDADES SA DE CV\n" + "SERVICIOS ESPECIALIZADOS DE INVESTIGACION Y CUSTODIA SA DE CV\n" + "RYSE MEDICA SA DE CV\n" + "AGROTILENO DE MEXICO SA DE CV\n" + "MEDICA SANTA CARMEN SAPI DE CV\n" + "ABSTEN DIAGNOSTIK SA DE CV\n" + "TLP SERVICIOS SA DE CV\n" + "GRUPO ABARMAR SA DE CV\n" + "BAJA SUR CONCRETOS SA DE CV\n" + "TLP SERVICIOS SA DE CV\n" + "GRUPO GARDOMI SA DE CV\n" + "PRESTADORES DE SERVICIOS EXTERNOS SA DE CV\n" + "FRESH SEASON SA DE CV\n" + "SEGURIDAD PRIVADA INTEGRAL MANAVIL SA DE CV\n" + "DISEÑOS DE MODA DMC SA DE CV\n" + "UNION DE CRIADORES LAS PRADERAS SPR DE RL\n" + "INDUSTRIAS SANDOVAL SA DE CV\n" + "RLX INVESCO II SA DE CV\n" + "HI TEC CONSTRUCCION SA DE CV\n" + "VARSAL DISTRIBUCIONES SA DE CV\n" + "GUMA DE OCCIDENTE SA DE CV\n" + "TYDAN TUBOS Y DERIVADOS DE ACERO DEL NORESTE SA DE CV\n" + "NUEVO WKS DOOR SYSTEMS SA DE CV\n" + "GC PISOS LASER SA DE CV\n" + "BERCALE SERVICES SA DE CV\n" + "EURO ALEMANA CAMIONES SA DE CV\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