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

r"
"

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 = "re.match('(.*).*(\\[.*\\]).*(\\[.*\\])', '')"; final String string = "The.Last.Ship.S02E13.1080p.WEB-DL.DD5.1.H.264-BLiN.mkv*\n" + "The.Librarians.US.S02E05.720p.HDTV.x264-FLEET.mkv*\n" + "The.Librarians.US.S02E06.720p.HDTV.x264-0SEC.mkv*\n" + "The.Librarians.US.S02E08.720p.HDTV.x264-0SEC.mkv*\n" + "The.Librarians.US.S02E09.720p.HDTV.x264-0SEC.mkv*\n" + "The.Librarians.US.S02E10.720p.HDTV.x264-KILLERS.mkv*\n" + "tvs-csi-cyber-dd51-ded-dl-18p-ithd-avc-101.mkv*\n" + "tvs-csi-cyber-dd51-ded-dl-18p-ithd-avc-102.mkv*\n" + "tvs-csi-cyber-dd51-ded-dl-18p-ithd-avc-103.mkv*\n" + "Warehouse.13.S04E20.720p.HDTV.x264-EVOLVE.mkv*\n" + "Warehouse.13.S05E01.720p.HDTV.x264-REMARKABLE.mkv*\n" + "warehouse.13.s05e02.720p.hdtv.x264-killers.mkv*\n" + "warehouse.13.s05e03.720p.hdtv.x264-killers.mkv*\n" + "warehouse.13.s05e04.720p.hdtv.x264-2hd.mkv*\n" + "Warehouse.13.S05E05.720p.HDTV.X264-DIMENSION.mkv*\n" + "Warehouse.13.S05E06.720p.HDTV.X264-DIMENSION.mkv*\n" + "White.Collar.S04E15.The.Original.720p.WEB-DL.DD5.1.h.264-NTb.mkv*\n" + "White.Collar.S04E16.PROPER.720p.HDTV.x264-EVOLVE.mkv*\n" + "White.Collar.S05E01.At.What.Price.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S05E02.Out.of.the.Frying.Pan.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "white.collar.s05e03.720p.hdtv.x264-killers.mkv*\n" + "White.Collar.S05E04.Controlling.Interest.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S05E05.Master.Plan.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S05E06.Ice.Breaker.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S05E06.Ice.Breaker.720p.WEB-DL.DD5.1.H.264-NTb-thumb.jpg*\n" + "White.Collar.S05E07.Quantico.Closure.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S05E07.Quantico.Closure.720p.WEB-DL.DD5.1.H.264-NTb-thumb.jpg*\n" + "White.Collar.S05E08.720p.HDTV.x264-IMMERSE.mkv*\n" + "White.Collar.S05E08.720p.HDTV.x264-IMMERSE-thumb.jpg*\n" + "White.Collar.S05E09.No.Good.Deed.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S05E09.No.Good.Deed.720p.WEB-DL.DD5.1.H.264-NTb-thumb.jpg*\n" + "White.Collar.S05E10.Live.Feed.720p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S05E10.Live.Feed.720p.WEB-DL.DD5.1.H.264-NTb-thumb.jpg*\n" + "White.Collar.S05E11.720p.HDTV.x264-REMARKABLE.mkv*\n" + "White.Collar.S05E11.720p.HDTV.x264-REMARKABLE-thumb.jpg*\n" + "White.Collar.S05E12.REPACK.720p.HDTV.x264-KILLERS.mkv*\n" + "White.Collar.S05E13.720p.HDTV.x264-REMARKABLE.mkv*\n" + "White.Collar.S06E01.Borrowed.Time.1080p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S06E02.Return.to.Sender.1080p.WEB-DL.DD5.1.H.264-NTb.mkv*\n" + "White.Collar.S06E03.720p.HDTV.x264-KILLERS.mkv*\n" + "White.Collar.S06E04.720p.HDTV.x264-KILLERS.mkv*\n" + "White.Collar.S06E05.720p.HDTV.x264-KILLERS.mkv*\n" + "White.Collar.S06E06.720p.HDTV.X264-DIMENSION.mkv*\n"; final Pattern pattern = Pattern.compile(regex); final Matcher matcher = pattern.matcher(string); if (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