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

/
/
g

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 = "(?:#EXT-X-STREAM-INF:|#EXT-X-I-FRAME-STREAM-INF:)(?:BANDWIDTH=(?<BANDWIDTH>\\d+),?|CODECS=(?<CODECS>\"[^\"]*\"),?|RESOLUTION=(?<RESOLUTION>\\d+x\\d+),?|AUDIO=(?<AUDIO>\"[^\"]*\"),?|SUBTITLES=(?<SUBTITLES>\"[^\"]*\"),?|URI=(?<URI>\"[^\"]*\"),?)*"; final String string = "#EXTM3U\n\n\n" + "#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"bipbop_audio\",LANGUAGE=\"eng\",NAME=\"BipBop Audio 1\",AUTOSELECT=YES,DEFAULT=YES\n" + "#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"bipbop_audio\",LANGUAGE=\"eng\",NAME=\"BipBop Audio 2\",AUTOSELECT=NO,DEFAULT=NO,URI=\"alternate_audio_aac_sinewave/prog_index.m3u8\"\n\n\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"English\",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=\"en\",URI=\"subtitles/eng/prog_index.m3u8\"\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"English (Forced)\",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=\"en\",URI=\"subtitles/eng_forced/prog_index.m3u8\"\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"Français\",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=\"fr\",URI=\"subtitles/fra/prog_index.m3u8\"\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"Français (Forced)\",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=\"fr\",URI=\"subtitles/fra_forced/prog_index.m3u8\"\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"Español\",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=\"es\",URI=\"subtitles/spa/prog_index.m3u8\"\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"Español (Forced)\",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=\"es\",URI=\"subtitles/spa_forced/prog_index.m3u8\"\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"日本語\",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=\"ja\",URI=\"subtitles/jpn/prog_index.m3u8\"\n" + "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"日本語 (Forced)\",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=\"ja\",URI=\"subtitles/jpn_forced/prog_index.m3u8\"\n\n" + "#EXT-X-STREAM-INF:BANDWIDTH=263851,CODECS=\"mp4a.40.2, avc1.4d400d\",RESOLUTION=416x234,AUDIO=\"bipbop_audio\",SUBTITLES=\"subs\"\n" + "gear1/prog_index.m3u8\n" + "#EXT-X-I-FRAME-STREAM-INF:URI=\"gear1/iframe_index.m3u8\",CODECS=\"avc1.4d400d\",BANDWIDTH=28451\n\n" + "#EXT-X-STREAM-INF:BANDWIDTH=577610,CODECS=\"mp4a.40.2, avc1.4d401e\",RESOLUTION=640x360,AUDIO=\"bipbop_audio\",SUBTITLES=\"subs\"\n" + "gear2/prog_index.m3u8\n\n" + "#EXT-X-STREAM-INF:BANDWIDTH=915905,CODECS=\"mp4a.40.2, avc1.4d401f\",RESOLUTION=960x540,AUDIO=\"bipbop_audio\",SUBTITLES=\"subs\"\n" + "gear3/prog_index.m3u8\n\n" + "#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=297056,CODECS=\"avc1.4d401f\",URI=\"gear3/iframe_index.m3u8\"\n\n\n" + "#EXT-X-STREAM-INF:BANDWIDTH=1030138,CODECS=\"mp4a.40.2, avc1.4d401f\",RESOLUTION=1280x720,AUDIO=\"bipbop_audio\",SUBTITLES=\"subs\"\n" + "gear4/prog_index.m3u8\n\n" + "#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=339492,CODECS=\"avc1.4d401f\",URI=\"gear4/iframe_index.m3u8\"\n\n\n" + "#EXT-X-STREAM-INF:BANDWIDTH=1924009,CODECS=\"mp4a.40.2, avc1.4d401f\",RESOLUTION=1920x1080,AUDIO=\"bipbop_audio\",SUBTITLES=\"subs\"\n" + "gear5/prog_index.m3u8\n\n" + "#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=669554,CODECS=\"avc1.4d401f\",URI=\"gear5/iframe_index.m3u8\"\n\n\n" + "#EXT-X-STREAM-INF:BANDWIDTH=41457,CODECS=\"mp4a.40.2\",AUDIO=\"bipbop_audio\",SUBTITLES=\"subs\"\n" + "gear0/prog_index.m3u8"; final Pattern pattern = Pattern.compile(regex); 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