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
Processing...

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 = "\\{\"contents\":\\{\"name\":\"(.*)\",\"rarity\":\"(\\d*)\",\"base_attack\":\"(\\d*)\",\"base_defense\":\"(\\d*)\",\"base_magic_attack\":\"(\\d*)\",\"base_magic_defense\":\"(\\d*)\",\"base_speed\":\"(\\d*)\",\"base_luck\":\"(\\d*)\",\"hi_level\":\"?(\\d*)\"?,\"hi_attack\":(\\d*),\"hi_defense\":(\\d*),\"hi_magic_attack\":(\\d*),\"hi_magic_defense\":(\\d*),\"hi_speed\":(\\d*),\"hi_luck\":(\\d*),\"((weapon)|(protector)|(accessoire))_id\":\"\\d*\",\"description\":\"([^\"*]*)(?:\\*([^\"]*))?\",\"\\g{16}_image\":\"([^\"]*)\",\"sale_price\":\"\\d*\"\\},\"header\":\\{\"status\":\"OK\",\"error_msg\":null\\}\\}"; final String string = "{\"contents\":{\"name\":\"Devil\\u2019s Rage Hammer\",\"rarity\":\"5\",\"base_attack\":\"43\",\"base_defense\":\"0\",\"base_magic_attack\":\"1\",\"base_magic_defense\":\"0\",\"base_speed\":\"0\",\"base_luck\":\"0\",\"hi_level\":65,\"hi_attack\":117,\"hi_defense\":0,\"hi_magic_attack\":4,\"hi_magic_defense\":0,\"hi_speed\":0,\"hi_luck\":0,\"weapon_id\":\"11269\",\"description\":\"A hammer that symbolizes rage, one of many carried by the Brimstone Commander of the legions of mankind's natural enemy, the Demon King. The weapon transforms the wielder\\u2019s anger into power, it\\u2019s power is limitless as their rage burns hotter and hotter. Guess that\\u2019s why it was such a good match for the old Commander.\",\"weapon_image\":\"http:\\/\\/cdn.girlskingdom.nutaku.net\\/img\\/icon\\/item\\/large\\/i188_01_l.png\",\"sale_price\":\"4800\"},\"header\":{\"status\":\"OK\",\"error_msg\":null}}"; final String subst = "[template]Hitsuji:TemplateEquipment\\r\\n | Name = ${1}\\r\\n | Image = ${22}\\r\\n | Rarity = ${2}\\r\\n | Type = (?{17}Weapon)(?{18}Armor)(?{19}Accessoire)\\r\\n | Class = Universal\\r\\n | Description = ${20}\\r\\n | Effect = ${21}\\r\\n | HP level 1 =\\r\\n | MP level 1 =\\r\\n | Attack level 1 = ${3}\\r\\n | Defense level 1 = ${4}\\r\\n | Magic level 1 = ${5}\\r\\n | Resistance level 1 = ${6}\\r\\n | Agility level 1 = ${7}\\r\\n | Luck level 1 = ${8}\\r\\n | Level = ${9}\\r\\n | HP level X =\\r\\n | MP level X =\\r\\n | Attack level X = ${10}\\r\\n | Defense level X = ${11}\\r\\n | Magic level X = ${12}\\r\\n | Resistance level X = ${13}\\r\\n | Agility level X = ${14}\\r\\n | Luck level X = ${15}\\r\\n[/template]"; 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