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

/
/
gms

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 = "<[Rr]epresentation[^>]*?[Bb]andwidth=\"0?[2-9]\\d{6}\"[\\s\\S]*?[Rr]epresentation>"; final String string = "<MPD xmlns=\"urn:mpeg:dash:schema:mpd:2011\" minBufferTime=\"PT1.500000S\" type=\"static\" mediaPresentationDuration=\"PT0H9M54.00S\" profiles=\"urn:mpeg:dash:profile:isoff-live:2011\">\n" + " <ProgramInformation moreInformationURL=\"http://gpac.sourceforge.net\">\n" + " <Title>/home/elkhatib/Documents/dash264/TestCases/2b/qualcomm/2_BBB_5Sec_MainProf/MultiRes.mpd generated by GPAC</Title>\n" + " </ProgramInformation>\n" + " <Period id=\"\" duration=\"PT0H9M54.00S\">\n" + " <AdaptationSet segmentAlignment=\"true\" maxWidth=\"1280\" maxHeight=\"720\" maxFrameRate=\"24\" par=\"16:9\">\n" + " <Representation id=\"1\" mimeType=\"video/mp4\" codecs=\"avc1.4d401f\" width=\"512\" height=\"288\" frameRate=\"24\" sar=\"1:1\" startWithSAP=\"1\" bandwidth=\"2000000\">\n" + " <SegmentTemplate timescale=\"12288\" duration=\"61440\" media=\"BBB_512_640K_video_$Number$.mp4\" startNumber=\"1\" initialization=\"BBB_512_640K_video_init.mp4\" />\n" + " </Representation>\n" + " <Representation id=\"1\" \n" + "mimeType=\"video/mp4\" \n" + "codecs=\"avc1.4d401f\" \n" + "width=\"512\" \n" + "height=\"288\" \n" + "frameRate=\"24\" \n" + "sar=\"1:1\" \n" + "startWithSAP=\"1\" \n" + "bandwidth=\"1000000\">\n" + " <SegmentTemplate timescale=\"12288\" duration=\"61440\" media=\"BBB_512_640K_video_$Number$.mp4\" startNumber=\"1\" initialization=\"BBB_512_640K_video_init.mp4\" />\n" + " </Representation>\n" + " <Representation id=\"1\" mimeType=\"video/mp4\" codecs=\"avc1.4d401f\" width=\"512\" height=\"288\" frameRate=\"24\" sar=\"1:1\" startWithSAP=\"1\" bandwidth=\"2000000\">\n" + " <SegmentTemplate timescale=\"12288\" duration=\"61440\" media=\"BBB_512_640K_video_$Number$.mp4\" startNumber=\"1\" initialization=\"BBB_512_640K_video_init.mp4\" />\n" + " </Representation>\n" + " <Representation id=\"2\" mimeType=\"video/mp4\" codecs=\"avc1.4d401f\" width=\"768\" height=\"432\" frameRate=\"24\" sar=\"1:1\" startWithSAP=\"1\" bandwidth=\"4000000\">\n" + " <SegmentTemplate timescale=\"12288\" duration=\"61440\" media=\"BBB_768_1440K_video_$Number$.mp4\" startNumber=\"1\" initialization=\"BBB_768_1440K_video_init.mp4\" />\n" + " </Representation>\n" + " </AdaptationSet>\n" + " </Period>\n" + "</MPD>\n"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.DOTALL); 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