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 = "\"repoType\":(.*?)\"repo\":(.*?),|\"resType\":(.*?),|\"result\":(.*?),|\"policy\":(.*?),|\"enforcer\":(.*?),|\"sess\":(.*?),|\"cliType\":(.*?),|\"reqData\":(.*?),|\"agentHost\":(.*?),|\"logType\":(.*?),|\"id\":(.*?),|\"seq_num\":(.*?),|\"event_count\":(.*?),|\"event_dur_ms\":(.*?),|\"tags\":(.*?),|\"additional_info\":|\"\\{(.)(?!$)"; final String string = "{\"repoType\":3,\"repo\":\"DEV01_hive\",\"reqUser\":\"na230292\",\"evtTime\":\"2018-05-07 07:29:16.765\",\"access\":\"ALTER\",\"resource\":\"stg_hr_erp_hr_erpprod/hr_dm_application_groups\",\"resType\":\"@table\",\"action\":\"alter\",\"result\":1,\"policy\":695,\"enforcer\":\"ranger-acl\",\"sess\":\"ce536988-846d-47d2-a9dc-40e88c9c3e1a\",\"cliType\":\"HIVESERVER2\",\"cliIP\":\"149.25.76.150\",\"reqData\":\"msck repair table stg_hr_erp_hr_erpprod.hr_dm_application_groups\",\"agentHost\":\"rpc11743.corp.ncr.com\",\"logType\":\"RangerAudit\",\"id\":\"358f75d9-8423-49e1-bd3e-3cc795cccf2e-25620\",\"seq_num\":51241,\"event_count\":1,\"event_dur_ms\":0,\"tags\":[blah],\"additional_info\":\"{\\\"remote-ip-address\\\":149.25.76.150, \\\"forwarded-ip-addresses\\\":[]\",\"cluster_name\":\"DEV01\"}\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