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
No Match

/
/
gm

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 = "(?<=\")(?:[A-Z][a-f0-9]{84}|[A-F0-9]{36})(?=\")"; final String string = "$(document).ready(function() {\n" + " vlive.tv.common.init(\"en\", \"VE\", \"5454545\");\n" + " vlive.video.init(\"VOD\", \"45454\", \"VOD_ON_AIR\", \"NONE\", \"54454F\",\n" + " \"6FABE43B271345FFCFA4D2028AF85F80C9F6\",\n" + " \"V1294005a2aac29b64592ce9e636d68fb5506721c2ceac160d67a0488c1d25f3314bace9e636d68fb5506\",\n" + " [],\n" + " \"\", \"true\", \"false\");\n" + " new vlive.video.list().init(\"suggest\", \"6\", \"/video/suggest/more\", {videoSeq:\"454545\", channelCode:\"54545\"}); new vlive.video.list().init(\"upcoming\", \"6\", \"/video/upcoming/more\", {videoSeq:\"54545\", playlistSeq:\"\", channelCode:\"5454545\"}); \n" + " vlive.tv.live.thumb.handler.init(\"https://vlive-thumb.pstatic.net\");\n" + " vlive.tv.share.init(\"Some Title\", \"https://www.vlive.tv/video/xxxx\", \"https://v-phinf.pstatic.net/20190811_131/4509495095_JPEG/93e3a15d-bc43-11e9-a12f-5054343_43.jpg?type=a720_play\", \"shareVod_343434_4455457\", \"45454\");\n" + " vlive.video.showShoppingBanner(\"4544343\");\n\n" + " });"; 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