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

@
@
gmis

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 = "class=\"[^\"]*(?<=\"|\\s)left-top-container(?=\"|\\s)[^\"]*\"[^<]*<h2[^>]*>(?<title>[^<]*)</h2"; final String string = "<div class=\"left-top-container\"> <h2 itemprop=\"name\"> Nike Magista</h2> <div class=\"listing_info\"> <div class=\"list_id\"><strong>List-ID: </strong>52002304 </div> <div class=\"list_time\"> Yesterday 09:20 </div> </div> <div class=\"ad_images\"> <!-- IMAGE GALLERY --> <div class=\"\" id=\"image-gallery\"> <div id=\"gallery-image-border\"> <meta itemprop=\"image\" content=\"http://img.rnudah.com/images/04/044707022491864.jpg\"> <span class=\"trackable favourite-heart favourite-heart-empty\" aria-hidden=\"true\" data-list-id=\"52002304\" data-company-ad=\"0\" data-category=\"4160\" data-region=\"7\" data-event_type=\"view\" data-event_name=\"save_favourite_ad\" data-page_name=\"Add Favourite Ad\" data-xtn2=\"5\" data-xiti_f1=\"4160\" data-xiti_f2=\"7\" data-xiti_f3=\"2\" data-xiti_f4=\"2\" data-xiti_f5=\"248\"></span> <div class=\"heart-icon-tip adview-tip\"> <div class=\"arrow-tip\"></div> <div class=\"tip-content\"> Click on the heart to add this to your Favourite list. </div> </div> <div id=\"gallery-image-container\"><span><a href=\"javascript:void(0)\" onclick=\"gallery.nextImage()\"><img src=\"http://img.rnudah.com/images/04/044707022491864.jpg\" style=\"margin-top:44px;margin-left:0px\"></a></span></div> </div> </div> <div id=\"gallery-thumbnail-containers\" style=\"display: none\"> <ul id=\"gallery-thumbnail-items\"> <li><a href=\"javascript:void(0)\" onclick=\"gallery.move('prev')\" class=\"gallery-navigation\" style=\"display: none;\"><img src=\"/img/none.gif\" class=\"sprite_view_arrow-left\"></a></li> <li id=\"gallery-thumbnails-li\"> <div id=\"gallery-thumbnails-ul-container\"> <ul id=\"gallery-thumbnails\" style=\"width: 540px;\"><li data-sort=\"1\" class=\"thumbnail-active\"><a href=\"javascript:void(0)\" style=\"margin-top: 5.5px\" onmouseover=\"gallery.changeGalleryImage(&quot;0&quot;)\"><img src=\"http://img.rnudah.com/thumbs/04/044707022491864.jpg\"></a></li></ul> </div> </li> <li><a href=\"javascript:void(0)\" onclick=\"gallery.move('next')\" class=\"gallery-navigation\" style=\"display: none;\"><img src=\"/img/none.gif\" class=\"sprite_view_arrow-right\"></a></li> </ul> </div> <!-- IMAGE GALLERY --> </div> <div class=\"ad_info\"> </div></div>"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE | 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