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

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "^(?:[\\d\\sx]+)?(?:\\[.*\\]\\s)?(?:(.*)(?:[\\(\\/].*)$|(.*)(?:foil)|(.*?)\\d|(.*))"; final String string = "4x Silhana Ledgewalker (Silhana Saltador de Peitoril) - NM\n" + "4x Kiln Fiend (Demônio Fornalha) - NM\n" + "4x Assault Strobe (Estroboscópio de Ataque) - NM\n" + "1x [Expedition] Wasteland\n" + "Urborg, Tomb of Yawgmoth\n" + "4 Thoughtcast\n" + "1x [OGW] Kozilek, a Grande Distorção\n" + "1x [OGW] Retorno de Kozilek\n" + "1x [OGW] Retorno de Kozilek\n" + "1x [OGW] Linvala, a Preservadora\n" + "Regal Force\n" + "2 Bloodstained Mire\n" + "4 Relic of Progenitus\n" + "1x Olho de Ugin / Eye of Ugin FOIL\n" + "1x Templo dos Eldrazi / Eldrazi Temple\n" + "1x [Expedition] Prairie Stream (Mint)\n" + "2x World Breaker / Rompe-mundos Mint\n" + "4x Holy Day (Dia Sagrado) - NM\n" + "1x TAmpo de adivinhação do sensei\n" + "1 x Gosmanuladora\n" + "1 x Gaddock Teeg\n" + "4x Força de Vontade\n" + "1x Fractius Pele Preciosa / Gemhide Sliver\n" + "1x Lupíneo Coração de Prata / Wolfir Silverheart\n" + "1 x Inquisição de Kozilek 4 de 4\n" + "1 x Gosmanuladora\n" + "Tropical island\n" + "1x Ugin's Nexus foil\n" + "1x Visões do Soro FOIL \\\"FNM\\\"\n" + "1x Labirinto Nimboso / Nimbus Maze\n" + "1x Espadas em Arados / Swords to Plowshares\n" + "1x Regiões Agrestes de Adarkar / Adarkar Wastes\n" + "1x Costa do Mar de Cromo / Seachrome Coast\n" + "1x Presente do Molda-aço / Steelshaper\\\\\\\\\n" + "1x Aprisionar / Remand\n" + "1x Imposto Territorial / Land Tax\n" + "1x Pasmar / Daze (JP)\n" + "1x Magiaprisionar / Trickbind\n" + "2x Comandante do Elmo de Coral / Coralhelm Commander\n" + "1x Caminho para o Exílio / Path to Exile\n" + "2x Thrun, the Last Troll/ Thrun, o Último Troll **NM**\n" + "1x Cone de Vapor / Vapor Snag\n" + "1x Cone de Vapor / Vapor Snag\n" + "1x Cone de Vapor / Vapor Snag\n" + "1x Cone de Vapor / Vapor Snag\n" + "1x Cone de Vapor / Vapor Snag"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE); 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