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
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]
  • 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
Processing...

Test String

Code Generator

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "^5((0[0-9]|[3-5]\\d)|(92)) \\d{3} \\d{4}$"; final String string = "Turkcell\n\n" + "530 123 4567\n" + "531 123 4567\n" + "532 123 4567\n" + "533 123 4567\n" + "534 123 4567\n" + "535 123 4567\n" + "536 123 4567\n" + "537 123 4567\n" + "538 123 4567\n" + "539 123 4567\n\n" + "Türk Telekom Mobil\n\n" + "500 123 4567\n" + "501 123 4567\n" + "502 123 4567\n" + "503 123 4567\n" + "504 123 4567\n" + "505 123 4567\n" + "506 123 4567\n" + "507 123 4567\n" + "508 123 4567\n" + "509 123 4567\n\n" + "550 123 4567\n" + "551 123 4567\n" + "552 123 4567\n" + "553 123 4567\n" + "554 123 4567\n" + "555 123 4567\n" + "556 123 4567\n" + "557 123 4567\n" + "558 123 4567\n" + "559 123 4567\n\n" + "Vodafone\n\n" + "540 123 4567\n" + "541 123 4567\n" + "542 123 4567\n" + "543 123 4567\n" + "544 123 4567\n" + "545 123 4567\n" + "546 123 4567\n" + "547 123 4567\n" + "548 123 4567\n" + "549 123 4567\n\n" + "Globalstar\n\n" + "592 211 9999\n" + "592 212 0888\n\n" + "Teknomobil\n\n" + "592 113 0900\n" + "592 113 1900\n" + "592 113 2900\n" + "592 113 3900\n" + "592 113 4900\n" + "592 113 5900\n" + "592 113 6900\n" + "592 110 0900\n" + "592 110 1900\n" + "592 110 2900\n" + "592 110 3900\n" + "592 110 4900\n" + "592 110 5900\n" + "592 110 6900\n\n" + "TB Haberleşme\n\n" + "592 616 0900\n" + "592 616 1900\n" + "592 616 2900\n" + "592 616 3900\n" + "592 616 4900\n\n" + "Medium Telekom\n\n" + "592 216 9999"; 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