Regular Expressions 101

Save & Manage Regex

  • Current Version: 1
  • Save & Share
  • Community Library

Flavor

  • PCRE2 (PHP)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java
  • .NET 7.0 (C#)
  • Rust
  • PCRE (Legacy)
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests
Sponsors
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
Processing...

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 = "PAN-OS\\s*ver:\\s*(?<PanOS_Version>\\S+)\\s*Panorama ver:\\s*(?<Panorama_Version>\\S+)"; final String string = "Panorama push to device:013101010578 for device-group: Durham_IPV6_INET_SVCS succeeded. JobId=2480530\n\n" + "Panorama push to device:007257000068919 for device-group: Azure-China-Internet-North succeeded. JobId=2480524\n\n" + "Panorama push to device:016401009013 for device-group: Austin_Experience_Lounge succeeded. JobId=2480530\n\n" + "extracted. In the case of the above 3 examples, the 3 values extracted are \"Durham_IPV6_INET_SVCS\", \"Azure-China-Internet-North\" and \"Austin_Experience_Lounge\" respectively.\n\n" + "Client authentication successful PAN-OS ver: 9.1.11-h3 Panorama ver:10.1.6-h3 Client IP: 10.68.196.211 Server IP: 10.58.217.123 Client CN: 013101004861\" \"Client authentication successful PAN-OS ver: 9.1.11 Panorama ver:10.1.6-h6 Client IP: 10.58.90.53 Server IP: 10.58.90.200 Client CN: 010401005346"; 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