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 single character of: a, b, c or d
    [[ab][cd]]
  • 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]
  • Character class intersection
    [\w&&[^\d]]
  • 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 = "(\\w+)=((?=\\{)(?:(?=.*?\\{(?!.*?\\3)(.*\\}(?!.*\\4).*))(?=.*?\\}(?!.*?\\4)(.*)).)+?.*?(?=\\3)[^\\{]*(?=\\4$)|\\\"{2}(.*?)\\\"{2}|(\\S+))"; final String string = "DC696,\"/xi/ajax/remoting/call/plaincall/adhocReportBuilderControllerProxy.getRortList.dwr\",\"2222-11-10 08:32:22,351 PLV=REQ CIP=9.9.9.7 CMID=syairp CMN=\"\"Dub Airport Corporation Limited\"\" SN=sfv4_APM180885. DPN=dbPool66HFT01 UID=3862D04108 UN=91F6025D47F01D IUID=1931 LOC=en_GB EID=\"\"EVENT-UNKNOWN-UNKNOWN-ob55abe0118-201110083217-396080\"\" AGN=\"\"[Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.35]\"\" RID=REQ-[7274545] MTD=POST URL=\"\"/xi/ajax/remoting/call/plaincall/adhocRrtBuilderCoollerProxy.getRtList.dwr\"\" RQT=2835 MID=ADIN PID=ADMIN PQ=ADIN_PAGE SUB=0 MEM=2331036 CPU=2410 UCPU=2300 SCPU=110 FRE=10 FWR=0 NRE=2281 NWR=218 SQLC=43 SQLT=142 RPS=200 SID=60826A3FAB005A8A9B930177C5******.pc6bc1029 GID=e262dde6d0e040070b58afd4c8 HSID=ddc665538db779508d3213c0bb63bcb1c49fe8236d5f0884ae975915728e61 CSL=CRITICAL CCON=0 CSUP=0 CLOC=0 CEXT=0 CREM=0 STK={\"\"n\"\":\"\"/xi/ajax/remoting/call/plaincall/adhocReportBuilderControllerProxy.getrtList.dwr\"\",\"\"i\"\":1,\"\"t\"\":2835,\"\"slft\"\":2679,\"\"sub\"\":[{\"\"n\"\":\"\"SQL:select * from sfv4_HOUA180885.REPORT_DEF WHERE REPORT_DEF_ID IN (SELECT REPORT_DEF_ID FROM sfv4_HA80885.REPORT_DTASET WHERE REPORT_ID=?) AND DELETED=? ORDER BY REPORT_DEF_ID asc NULLS LAST\"\",\"\"i\"\":17,\"\"t\"\":40,\"\"slft\"\":40,\"\"st\"\":337,\"\"m\"\":220958,\"\"nr\"\":154,\"\"rt\"\":0,\"\"rn\"\":22,\"\"fs\"\":0}]} \",\"2022-11-09T21:32:22.351+0000\",p66cf1029,\"dc606_ss_application\",1,\"/app/tomcat/logs/pef.log\",\"perf_log_yxx\",swsskix13\n" + "DC696,\"/xi/ajax/remoting/call/plaincall/adhocReportBuilderControllerProxy.getRortList.dwr\",\"2222-11-10 08 - 32"; 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