Regular Expressions 101

Save & Share

  • Regex Version: ver. 5
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

Substitution

Processing...

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 = "D601-10689-PC01"; final String string = "iPhone1,1\n" + "iPhone1,2\n" + "iPhone2,1\n" + "iPhone3,1\n" + "iPhone3,2\n" + "iPhone3,3\n" + "iPhone4,1\n" + "iPhone5,1\n" + "iPhone5,2\n" + "iPhone5,3\n" + "iPhone5,4\n" + "iPhone6,1\n" + "iPhone6,2\n" + "iPhone7,2\n" + "iPhone7,1\n" + "iPhone8,1\n" + "iPhone8,2\n" + "iPhone8,4\n" + "iPhone9,1\n" + "iPhone9,3\n" + "iPhone9,2\n" + "iPhone9,4\n" + "iPhone10,1\n" + "iPhone10,4\n" + "iPhone10,2\n" + "iPhone10,5\n" + "iPhone10,3\n" + "iPhone10,6\n" + "iPhone11,8\n" + "iPhone11,2\n" + "iPhone11,6\n" + "iPhone11,4\n" + "iPhone12,1\n" + "iPhone12,3\n" + "iPhone12,5\n" + "iPhone12,8\n" + "iPhone13,1\n" + "iPhone13,2\n" + "iPhone13,3\n" + "iPhone13,4\n" + "iPhone14,4\n" + "iPhone14,5\n" + "iPhone14,2\n" + "iPhone14,3\n" + "iPhone14,6\n\n" + "iPad1,1\n" + "iPad1,1\n" + "iPad2,1\n" + "iPad2,2\n" + "iPad2,3\n" + "iPad2,4\n" + "iPad2,5\n" + "iPad2,6\n" + "iPad2,7\n" + "iPad3,1\n" + "iPad3,2\n" + "iPad3,3\n" + "iPad3,4\n" + "iPad3,5\n" + "iPad3,6\n" + "iPad4,1\n" + "iPad4,2\n" + "iPad4,3\n" + "iPad4,4\n" + "iPad4,5\n" + "iPad4,6\n" + "iPad4,7\n" + "iPad4,8\n" + "iPad4,9\n" + "iPad5,1\n" + "iPad5,2\n" + "iPad5,3\n" + "iPad5,4\n" + "iPad6,11\n" + "iPad6,12\n" + "iPad6,3\n" + "iPad6,4\n" + "iPad6,7\n" + "iPad6,8\n" + "iPad7,1\n" + "iPad7,11\n" + "iPad7,12\n" + "iPad7,12\n" + "iPad7,12\n" + "iPad7,2\n" + "iPad7,3\n" + "iPad7,4\n" + "iPad7,5\n" + "iPad7,6\n" + "iPad8,1\n" + "iPad8,10\n" + "iPad8,10\n" + "iPad8,10\n" + "iPad8,11\n" + "iPad8,12\n" + "iPad8,12\n" + "iPad8,12\n" + "iPad8,2\n" + "iPad8,3\n" + "iPad8,3\n" + "iPad8,3,\n" + "iPad8,4\n" + "iPad8,4\n" + "iPad8,4\n" + "iPad8,5, \n" + "iPad8,6\n" + "iPad8,7\n" + "iPad8,7\n" + "iPad8,7\n" + "iPad8,8\n" + "iPad8,8\n" + "iPad8,8\n" + "iPad8,9\n" + "iPad11,1\n" + "iPad11,2\n" + "iPad11,2\n" + "iPad11,2\n" + "iPad11,3\n" + "iPad11,4\n" + "iPad11,4\n" + "iPad11,4\n" + "iPad11,6\n" + "iPad11,7\n" + "iPad11,7\n" + "iPad11,7\n" + "iPad12,1\n" + "iPad12,2\n" + "iPad12,2\n" + "iPad12,2\n" + "iPad13,1\n" + "iPad13,10\n" + "iPad13,11\n" + "iPad13,16\n" + "iPad13,17\n" + "iPad13,17\n" + "iPad13,2\n" + "iPad13,2\n" + "iPad13,2\n" + "iPad13,4\n" + "iPad13,5\n" + "iPad13,6\n" + "iPad13,7\n" + "iPad13,8\n" + "iPad13,9\n" + "iPad14,1\n" + "iPad14,2\n" + "iPad14,2\n\n" + "AppleTV1,1\n" + "AppleTV2,1\n" + "AppleTV3,1\n" + "AppleTV3,2\n" + "AppleTV5,3\n" + "AppleTV6,2\n" + "AppleTV11,1"; final String subst = ""; 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