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

`
`
gms

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 = "^([\\d-\\.\\s\\:]+)\\s.*?-\\s([\\w\\s:\\.]+)(<\\w+.*?)\\n\\d{4}"; final String string = "2018-11-25 14:10:29.184 [ajp-bio-172.27.9.196-8009-exec-1] ERROR c.q.j.c.a.event.AuditEventHandler U:UNKNOWN SC:17618 TX:0 - SesIdCode is null. So no audit log transaction for this transaction\n" + "2018-11-25 14:10:29.184 [ajp-bio-172.27.9.196-8009-exec-1] INFO c.e.p.component.SenderComponent U:UNKNOWN SC:17618 TX:0 - SendMessage, Invockation End..\n" + "2018-11-25 14:10:38.666 [ajp-bio-172.27.9.196-8009-exec-1] DEBUG c.e.r.p.endpoint.PickerProcessor U:UNKNOWN SC:17618 TX:0 - Message Picked from the queue....<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\">\n" + " <soapenv:Header />\n" + " <soapenv:Body>\n" + " <EAI_MESSAGE>\n" + " <EAI_HEADER>\n" + " <ServiceName>SMS</ServiceName>\n" + " <ServiceType>SendSms</ServiceType>\n" + " <ServiceVersion>1.0</ServiceVersion>\n" + " <Client>xx</Client>\n" + " <ClientChannel>SBA</ClientChannel>\n" + " <MsgChannel>WebServices</MsgChannel>\n" + " <SecurityInfo>\n" + " <Authentication>\n" + " <UserId>xxx</UserId>\n" + " <Password>xxx</Password>\n" + " </Authentication>\n" + " <Authorization>\n" + " <UserId>xxx</UserId>\n" + " </Authorization>\n" + " </SecurityInfo>\n" + " <SnapIns>\n" + " <NameValue Name=\"\" Value=\"\" />\n" + " </SnapIns>\n" + " <RequestorLanguage>E</RequestorLanguage>\n" + " <EaiReference>0</EaiReference>\n" + " <ReturnCode>0000</ReturnCode>\n" + " </EAI_HEADER>\n" + " <EAI_BODY>\n" + " <EAI_REQUEST>\n" + " <SendSmsRequest>\n" + " <RefID>502521</RefID>\n" + " <ISD>974</ISD>\n" + " <PhoneNO>xxx</PhoneNO>\n" + " <Message>Dear User, Your unique OTP pin for xxx is xxxx</Message>\n" + " <Language>E</Language>\n" + " <Priority>2</Priority>\n" + " <SchDate />\n" + " <SrcKey>xx</SrcKey>\n" + " <Department>xx xx</Department>\n" + " <SMSUser>SMS Alerter</SMSUser>\n" + " </SendSmsRequest>\n" + " </EAI_REQUEST>\n" + " </EAI_BODY>\n" + " </EAI_MESSAGE>\n" + " </soapenv:Body>\n" + "</soapenv:Envelope>\n" + "2018-11-25 14:10:38.666 [ajp-bio-172.27.9.196-8009-exec-1] INFO c.e.r.process.GenericProcessor U:UNKNOWN SC:17618 TX:0 - Starting the processor -com.eix.processor.persistence.InPersisterProcessor\n" + "2018-11-25 14:27:58.099 [ajp-bio-172.27.9.196-8009-exec-1] INFO c.e.w.c.i.impl.CheckInServiceImpl U:UNKNOWN SC:17740 TX:0 - Invoking webservice http://alteainterface.qatarairways.com.qa/AlteaODS/AlteaODS.svc\n" + "2018-11-25 14:27:58.178 [ajp-bio-172.27.9.196-8009-exec-1] INFO c.e.w.c.i.impl.CheckInServiceImpl U:UNKNOWN SC:17740 TX:0 - Response Message : <MESSAGE><HEADER><ServiceName>xxxx xxxx</ServiceName><ServiceType>PassengerInfo</ServiceType><ServiceVersion>1.0</ServiceVersion><Client>xxx</Client><ClientChannel>xx</ClientChannel><MsgChannel>WebServices</MsgChannel><SecurityInfo><Authentication><UserId>xx</UserId><Password>xxx</Password></Authentication></SecurityInfo></HEADER><BODY><RESPONSE><passengerStatus>Invalid</passengerStatus><RegisteredFlight></RegisteredFlight><passengerPhone></passengerPhone><passengerEmail></passengerEmail><FFPNumber></FFPNumber></RESPONSE></BODY></MESSAGE>\n" + "2018-11-25 14:27:58.178 [ajp-bio-172.27.9.196-8009-exec-1] INFO c.e.r.process.GenericProcessor U:UNKNOWN SC:17740 TX:0 - Starting the processor -com.eix.processor.persistence.OutPersisterProcessor\n" + "2018-11-25 14:27:58.178 [ajp-bio-172.27.9.196-8009-exec-1] INFO \n"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.DOTALL); 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