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 = "\\{\\s*file\\s*:\\s*[\"']\\s*(http[^\"']+\\.mp4)"; final String string = "<!DOCTYPE html>\n" + "<html>\n" + "<head>\n" + "<meta charset=\"UTF-8\" />\n" + "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1, maximum-scale=1\" />\n" + "<link href='https://fonts.googleapis.com/css?family=Hanuman' rel='stylesheet' type='text/css'>\n" + "<link href=\"https://fonts.googleapis.com/css?family=Scada\" rel=\"stylesheet\">\n" + "<link href=\"jwplayer-7.12.8/skins/prime.min2.css\" rel=\"stylesheet\" type=\"text/css\" />\n" + "<script type=\"text/javascript\" src=\"jwplayer-7.12.8/jwplayer.js\"></script>\n" + "<script type=\"text/javascript\">jwplayer.key=\"I9HOJrL1NmqruQ60as34wt34/23422dsdrwer==\";</script>\n" + "</head>\n" + "<body>\n" + "<div id=\"picasa\" class=\"picasa\"></div>\n" + "<script type=\"text/javascript\">\n" + " var playerInstance = jwplayer(\"picasa\");\n" + " playerInstance.setup({\n" + " id:'picasa',\n" + " controls: true,\n" + " displaytitle: true,\n\n" + " flashplayer: \"//ssl.p.jwpcdn.com/player/v/7.12.5/jwplayer.flash.swf\",\n" + " width: \"100%\",\n" + " height: \"100%\",\n" + " aspectratio: \"16:9\",\n" + " fullscreen: \"true\",\n" + " provider: 'http',\n" + " autostart: false,\n" + " image:'http://localhost/viral/viralvideo.jpg',\n" + " sources: [{file:\"http://localhost/srt/43534234/viral022018SD.MP4\",label:\"SD\",type: \"video/mp4\"},{file:\"http://localhost/srt/43534234/viral022018HD.MP4\",label:\"HD\",type: \"video/mp4\",default: true}],\n" + " sharing:{\n" + " link: \"\",\n" + " code: \"\",\n" + " heading: \"Share\",\n" + " sites: [\"facebook\",\"twitter\",\"tumblr\",\"googleplus\",\"reddit\",\"linkedin\",\"interest\",\"email\"],\n" + " },\n" + "sharing:{\n" + " link: \"\",\n" + " code: \"\",\n" + " heading: \"Share\",\n" + " sites: [\"facebook\",\"twitter\",\"tumblr\",\"googleplus\",\"reddit\",\"linkedin\",\"interest\",\"email\"],\n" + " },\n" + "tracks: [{\n" + " file: 'http://localhost/srt/viralvideo022018.srt',\n" + " label: 'English',\n" + " kind: 'captions',\n" + " \"default\":true\n" + "}],\n\n" + " captions: {\n" + " color: '#FFEB3B',\n" + " fontSize: 14,\n" + " fontFamily: 'Scada, Hanuman, sans-serif, Verdana, cursive',\n" + " fontOpacity: 100,\n" + " backgroundOpacity: 0,\n" + "backgroundColor: '#000000',\n" + " edgeStyle: 'raised',\n" + " windowColor: '#000000',\n" + " windowOpacity: 0\n" + " },\n" + "skin: {\n" + " name: 'prime',\n" + " },\n\n\n\n\n" + " });\n\n" + "</script>\n" + "</body>\n" + "</html>"; 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