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

Substitution

Processing...

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 = "(<)(\\w+)(,\\s)(.+)(,\\>)"; final String string = "<IccId, nvarchar(50),>\n" + " ,<DeliveryNumber, nvarchar(10),>\n" + " ,<DeliveryPosition, int,>\n" + " ,<ItemCreationDate, smalldatetime,>\n" + " ,<PlannedDeliveryDate, smalldatetime,>\n" + " ,<CableLength, float,>\n" + " ,<CableLengthUm, nvarchar(3),>\n" + " ,<GrossWeight, float,>\n" + " ,<GrossWeightUm, nvarchar(3),>\n" + " ,<NetWeight, float,>\n" + " ,<NetWeightUm, nvarchar(3),>\n" + " ,<SalesOrganization, nvarchar(4),>\n" + " ,<ShipToCode, nvarchar(10),>\n" + " ,<ShipToName, nvarchar(40),>\n" + " ,<ShipToStreet, nvarchar(60),>\n" + " ,<ShipToHouseNumber, nvarchar(10),>\n" + " ,<ShipToPostalCode, nvarchar(10),>\n" + " ,<ShipToCity, nvarchar(40),>\n" + " ,<ShipToCountry, nvarchar(3),>\n" + " ,<ShipToRegion, nvarchar(3),>\n" + " ,<DeliveryPlantNumber, nvarchar(4),>\n" + " ,<CableMaterialCode, nvarchar(18),>\n" + " ,<CableBatchNumber, nvarchar(10),>\n" + " ,<CableNominalDiameter, float,>\n" + " ,<CableNominalDiameterUm, nvarchar(3),>\n" + " ,<CableName, nvarchar(40),>\n" + " ,<CableProductionDate, smalldatetime,>\n" + " ,<CableProductionPlant, nvarchar(4),>\n" + " ,<CableSection, float,>\n" + " ,<CableSectionUm, nvarchar(3),>\n" + " ,<CableSectionMultiplier, float,>\n" + " ,<Voltage, float,>\n" + " ,<VoltageMu, nvarchar(3),>\n" + " ,<DrumNumber, nvarchar(18),>\n" + " ,<DrumType, nvarchar(18),>\n" + " ,<DrumCoreDiameter, float,>\n" + " ,<DrumCoreDiameterUm, nvarchar(3),>\n" + " ,<DrumInnerWidth, float,>\n" + " ,<DrumInnerWidthUm, nvarchar(3),>\n" + " ,<DrumWeight, float,>\n" + " ,<DrumWeightUm, nvarchar(3),>\n" + " ,<CustomerPurchaseOrderNumber, nvarchar(20),>\n" + " ,<CustomerName, nvarchar(35),>\n" + " ,<CustomerNumber, nvarchar(10),>\n" + " ,<CustomerMaterialNumber, nvarchar(35),>\n" + " ,<SalesOrderNumber, nvarchar(10),>\n" + " ,<SalesOrderPosition, nvarchar(6),>\n" + " ,<TotalSpins, float,>\n"; final String subst = "@$2 $4"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); // The substituted value will be contained in the result variable final String result = matcher.replaceAll(subst); System.out.println("Substitution result: " + result); } }

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