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"
"
g

Test String

Substitution

Processing...

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 = "window[^\\}]*\\}"; final String string = "<td>5589043</td><td>UNPublished</td><td>SNK-300-SNORKEL</td><td>0</td><td>Tribord</td><td>542</td><td>433</td><td>14.5</td><td>Adult</td><td>any</td><td>window.onload = function(){window.parent.CKEDITOR._[\"contentDomReadyattribute85\"]( window );}</td><td>\n" + " snorkelers and scuba divers.\n" + "</td><td>window.onload = function(){window.parent.CKEDITOR._[\"contentDomReadyattribute111\"]( window );}</td><td>2</td><td></td><td>FALSE</td><td>5000</td><td>128</td><td>MASKS & SNORKELS</td><td>11</td><td>Diving</td><td>519713</td><td>White</td><td></td><td>http://test.com/image/products/p_3358/zoom_asset_7454285.jpg</td><td>Freedom of movement</td><td>\n" + " Soft hypollergenic black silicone mouthpiece.\n" + "</td><td>Maintenance</td><td></td><td>Reduced chafing</td><td>\n" + " 100% phthalate-free PVC tube, 100% silicone mouthpiece.\n" + "</td><td>Technical</td><td></td><td>Easy storage</td><td>\n" + " Flexible tube that can positioned between mask strap and forehead.\n\n\n" + "</td><td>Composition</td><td>\n" + " salt water resistant. Only rinse with fresh water before prolonged storage.\n" + "</td><td>Comfortable</td><td>\n" + " Soft hypollergenic black silicone mouthpiece.\n" + "</td><td>Easy breathing</td><td></td><td>Anatomic design</td><td>\n" + " Flexible tube that can positioned between mask strap and forehead.\n\n\n" + "</td><td>Care Instructions</td><td>\n" + " salt water resistant. Only rinse with fresh water before prolonged storage.\n" + "</td><td>Mouth piece</td><td></td><td>Restriction of use</td><td></td><td>http://test.com/image/products/p_3358/zoom_asset_33225717.jpg</td><td>http://test.com/image/products/p_3358/zoom_asset_30448342.jpg</td><td>http://test.com/image/products/p_3358/zoom_asset_19099347.jpg</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>3359</td><td>2014-01-09 18:32:31</td><td>8174997</td><td>Published</td><td>DYNAMO-LAMP</td><td>90</td><td>Tribord</td><td>999</td><td>649</td><td>14.5</td><td>Any</td><td>any</td><td></td><td>\n" + " Snorkelling.Watertight to 5m, eco-friendly and economical.\n" + "</td><td></td><td>2</td><td></td><td>FALSE</td><td>333.7</td><td>129</td><td>SNORKELING KITS</td><td>11</td><td>Diving</td><td>1349256</td><td>Black</td><td></td><td>http://test.com/image/products/p_3359/big_800PX_29672977a.jpg</td><td>Battery</td><td>\n" + " 3 modes: Blinking, eco-friendly, and 100% (100% = 10minutes after 1min charge)\n" + "</td><td>Features</td><td></td><td>Swimming Depth</td><td>"; final String subst = ""; final Pattern pattern = Pattern.compile(regex); final Matcher matcher = pattern.matcher(string); // The substituted value will be contained in the result variable final String result = matcher.replaceAll(subst); System.out.println("Substitution result: " + result); } }

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