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

/
/
gmi

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 = "^(?!.*(anime|manga|hentai|sex|xxx))(.+)$"; final String string = "127.0.0.1 www.animenewsnetwork.com www.animenewsnetwork.co.uk\n\n" + "127.0.0.1 watchseries.lt www.tv.com myanimelist.net www.crunchyroll.co.uk www.wikia.com www.anidb.net www.gogoanime.com \n\n" + "127.0.0.1 www.goodanime.net www.pinoyanime.tv www.animeultima.tv animewaffles.tv anilinkz.com www.animehere.com www.anime4fun.com www.animefreak.tv \n\n" + "127.0.0.1 www.animetake.com www.waoanime.tv waoanime.tv mangafox.me www.animeget.com www.animefushigi.com\n\n" + "127.0.0.1 www.crunchyroll.com vodlocker.com answers.yahoo.com www.animeultima.tv zeroanime.net\n\n" + "127.0.0.1 www.tv.com www.watchsnk.com www.sidereel.com www.adultswim.com video.adultswim.com www.solarmovie.tl\n\n" + "127.0.0.1 watch32.com www.kongregate.com www.roblox.com www.siliconera.com mmoculture.com www.mangawindow.com www.hulu.com\n\n" + "127.0.0.1 www.dualshockers.com www.madman.co.nz www.mangabb.me www.ovguide.com www.tvrage.com anime-odcinki.pl www.mangabird.com \n\n" + "127.0.0.1 attackontitan.blogspot.com www.yidio.com www.dubzonline.tv www.vanime.net soulskill.com www.agaleradosanimes.net www.tvmuse.com\n\n" + "127.0.0.1 www.anitube.se www.animestatic.com kotaku.com n4g.co www.animelite.net attackontitan.blogspot.com www.solarmovie.tl\n\n" + "127.0.0.1 www.mangatank.com www.nineanime.com mangadoom.com desene.tv www.graalians.com jkanime.net dynasty-scans.com\n\n" + "127.0.0.1 www.anime-stream24.net watchtvseries.to animetako.com www.gaiaonline.com megafilmeshd.net deseneanime.ro\n\n" + "127.0.0.1 www.animeforum.com www.veoh.com http://anime44.co.uk animesstream.com animetoplist.org aniver.se\n\n" + "127.0.0.1 letmewatchanime.com napisy.info www.animesfox-br.org www.letmewatchthis.ch vershingekinokyojin.com\n\n" + "127.0.0.1 www.videoweed.es www.novamov.com beta.miloyski.com www.2gb-hosting.com www.tomwans.com www.gigabyteupload.com\n\n" + "127.0.0.1 f1.ilivlite.com played.to www.vidbull.com watchseries.ag www.animefave.net www.animeseason.com www.gogoanime.com\n\n" + "127.0.0.1 www.animeplus.tv animewaffles.tv www.animeflavor.com www.animebox.tv www.anime44.com www.animehere.com www.soul-anime.net\n\n" + "127.0.0.1 anilinkz.com www.nwanime.com www.anime-sub.com www.centeranime.net www.animedose.net www.subbedanime.tv"; 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