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

/
/

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 = "[-]{14}[0-9]+[\\s].+[\\s]+.+(?:[\\s]*)([\\s\\S]*)[\\s]{3}[-]{14}[0-9]+[\\r\\n]"; final String string = "Return-Path: <crown@noflem.date>\n" + "Delivered-To: me@finlaydag33k.nl\n" + "Received: from web01.01d.eu\n" + " by web01.01d.eu with LMTP\n" + " id UKmwFM5cels9EAAAfNQSUA\n" + " (envelope-from <crown@noflem.date>)\n" + " for <me@finlaydag33k.nl>; Mon, 20 Aug 2018 08:16:46 +0200\n" + "Return-path: <crown@noflem.date>\n" + "Envelope-to: me@finlaydag33k.nl\n" + "Delivery-date: Mon, 20 Aug 2018 08:16:46 +0200\n" + "Received: from mail by web01.01d.eu with spam-scanned (Exim 4.91)\n" + " (envelope-from <crown@noflem.date>)\n" + " id 1frdUb-0001AC-CB\n" + " for me@finlaydag33k.nl; Mon, 20 Aug 2018 08:16:46 +0200\n" + "X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on web01.01d.eu\n" + "X-Spam-Level: ****\n" + "X-Spam-Status: No, score=4.5 required=5.0 tests=FROMSPACE,\n" + " HTML_FONT_LOW_CONTRAST,HTML_MESSAGE,RDNS_NONE,T_REMOTE_IMAGE autolearn=no\n" + " autolearn_force=no version=3.4.1\n" + "Received: from [107.174.30.3] (helo=noflem.date)\n" + " by web01.01d.eu with esmtp (Exim 4.91)\n" + " (envelope-from <crown@noflem.date>)\n" + " id 1frdUZ-00019H-Eg\n" + " for me@finlaydag33k.nl; Mon, 20 Aug 2018 08:16:45 +0200\n" + "From: \" Roderick\" <crown@noflem.date>\n" + "Date: Mon, 20 Aug 2018 01:09:47 -0500\n" + "MIME-Version: 1.0\n" + "Subject: Are you a good pilot? Want to become one?\n" + "To: <me@finlaydag33k.nl>\n" + "Message-ID: <28mfPO16iDxTxnPJ_jT4Dib_DlNAQCDEUhRyp96JUTE.NNYAMLzX6-vdM1DDpnOXYdmLgAmcdkEMIV3WWEEeguk@noflem.date>\n" + "Content-Type: multipart/alternative;\n" + " boundary=\"------------008794531541259352341780\"\n" + "ReverseDNS: No reverse DNS for mailserver at 107.174.30.3, +100 Spam score\n" + "SPFCheck: Server passes SPF test, -30 Spam score\n" + "SpamTally: Final spam score: 70\n" + "X-Antivirus-Scanner: Clean mail though you should still use an Antivirus\n\n" + "This is a multi-part message in MIME format.\n" + "--------------008794531541259352341780\n" + "Content-Type: text/plain; charset=ISO-8859-1\n" + "Content-Transfer-Encoding: 7bit\n\n" + "The Game All Flight Fans Have Been Waiting For Is Finally Here...\n" + "<http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO>The World's Most Realstic Flight Sim\n" + "<http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO>\n" + "Watch The Amazing Video Demo Below:\n" + "<http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO>\n" + "==>Fly Over 200+ Different Aircraft==&gt;Real Controls Based on Real Cockpits!\n" + "<http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO>==&gt;Land Anywhere Worldswide With 25,000 Airport!==&gt;Real World Instrument Behaviour==&gt;Changable, Unpredictable Real-Time Weather\n\n" + "Fasten Your Seatbelts &amp; Prepare To Take Flight!\n" + "<http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO>\n\n\n\n" + "You can be asked to be removed by going here \n" + "<http://www.noflem.date/jfoqqvn/Opj5_SFF_jRHYZccPt3Qp1g0ljHZloZNOyXDjb0JTw8XHhojerqEmyefNIioyBHQKsYQNOrq2wI5EtqOulbttbhi_irrfSUPvFP21McyI0PcCw4ItD5UtfSkITxQp6MW.ofeReaGt1-VCYIC44BM2xP6EAjTUR03vqsqWuMCFiMu>or write to us below\n\n" + "<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->265 S. Schoolhouse St. Boynton Beach, FL 33435ing\n\n\n" + "--------------008794531541259352341780\n" + "Content-Type: text/html; charset=ISO-8859-1\n" + "Content-Transfer-Encoding: 7bit\n\n" + "<html>\n" + "<head>\n\n" + "<meta http-equiv=\"content-type\" content=\"text/html; charset=ISO-8859-1\">\n" + "</head>\n" + "<body>\n\n" + "<center>\n\n\n" + "<table font-size:=\"\" helvetica=\"\" style=\"box-sizing: inherit; color: rgb(119, 119, 119); font-family: \" width=\"600px\">\n\n\n" + " <tbody style=\"box-sizing: inherit;\">\n\n\n" + " <tr style=\"box-sizing: inherit;\">\n\n\n" + " <td align=\"left\" style=\"box-sizing: inherit;\">&nbsp;\n\n\n" + " <div style=\"box-sizing: inherit; padding: 8px; border-radius: 10px;\">\n\n\n" + " <center style=\"box-sizing: inherit;\">\n\n\n" + " <div style=\"box-sizing: inherit; font-size: 19px;\"><b style=\"box-sizing: inherit;\"><a href=\"http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO\" rel=\"nofollow\" style=\"box-sizing: inherit; text-decoration-line: none; color: red;\" target=\"_blank\">The Game All Flight Fans Have Been Waiting For Is Finally Here...</a><br style=\"box-sizing: inherit;\" />\n\n\n" + " <a href=\"http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO\" rel=\"nofollow\" style=\"box-sizing: inherit; text-decoration-line: none; color: black;\" target=\"_blank\">The World&#39;s Most Realstic Flight Sim</a></b></div>\n\n\n" + " </center>\n\n\n\n\n\n" + " <hr style=\"box-sizing: inherit; width: 310px; border-width: 3px; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-color: rgb(0, 176, 0);\" />&nbsp;\n\n\n" + " <center style=\"box-sizing: inherit; font-size: 22px; background-color: rgb(254, 253, 53);\"><strong style=\"box-sizing: inherit;\"><a href=\"http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO\" rel=\"nofollow\" style=\"box-sizing: inherit; text-decoration-line: none; color: rgb(65, 82, 73);\" target=\"_blank\"><span style=\"box-sizing: inherit; color: rgb(255, 0, 0);\">Watch The Amazing Video Demo Below:</span></a></strong></center>\n\n\n" + " &nbsp;\n\n\n\n\n\n" + " <div style=\"box-sizing: inherit; font-size: 19px;\">==&gt;Fly Over 200+ Different Aircraft<br style=\"box-sizing: inherit;\" />\n\n\n" + " <br style=\"box-sizing: inherit;\" />\n\n\n" + " ==&gt;Real Controls Based on Real Cockpits!<br style=\"box-sizing: inherit;\" />\n\n\n" + " &nbsp;\n\n\n" + " <center style=\"box-sizing: inherit;\"><a href=\"http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO\" rel=\"nofollow\" style=\"box-sizing: inherit; text-decoration-line: none; color: rgb(66, 133, 245);\" target=\"_blank\"><img alt=\"vp3flight\" src=\"http://www.noflem.date/plane_flight.jpg\" style=\"box-sizing: inherit;\" /></a></center>\n\n\n" + " <br style=\"box-sizing: inherit;\" />\n\n\n" + " ==&gt;Land Anywhere Worldswide With 25,000 Airport!<br style=\"box-sizing: inherit;\" />\n\n\n" + " <br style=\"box-sizing: inherit;\" />\n\n\n" + " ==&gt;Real World Instrument Behaviour<br style=\"box-sizing: inherit;\" />\n\n\n" + " <br style=\"box-sizing: inherit;\" />\n\n\n" + " ==&gt;Changable, Unpredictable Real-Time Weather</div>\n\n\n" + " &nbsp;\n\n\n\n\n\n" + " <center style=\"box-sizing: inherit;\">\n\n\n" + " <div style=\"box-sizing: inherit; font-size: 19px; background-color: rgb(55, 102, 144); padding: 8px; border-radius: 15px;\"><span style=\"box-sizing: inherit; font-size: 22px;\"><b style=\"box-sizing: inherit;\"><a href=\"http://www.noflem.date/hkeja/swdecr31drvszty/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO\" rel=\"nofollow\" style=\"box-sizing: inherit; text-decoration-line: none; color: rgb(255, 255, 255);\" target=\"_blank\">Fasten Your Seatbelts &amp; Prepare To Take Flight!</a></b></span></div><br />\n" + "<img src=\"http://www.noflem.date/Mfqs4im7f/uMiFCMuWqsqv30RUTjAE6Px2MB44CIYCV-1tGaeRefo/WM6pQxTIkSftU5DtI4wCcP0IycM12PFvPUSfrri_ihbttbluOqtE5Iw2qrONQYsKQHByoiINfeymEqrejohHX8wTJ0bjDXyONZolZHjl0g1pQ3tPccZYHRj_FFS_5jpO\" >\n\n\n" + " </center>\n\n\n\n\n\n" + " <hr style=\"box-sizing: inherit; width: 600px; border-width: 5px; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-color: rgb(255, 0, 0);\" /></div>\n\n\n\n\n\n" + " <p style=\"text-align: center;\"><br style=\"box-sizing: inherit;\" />\n\n\n" + " <br style=\"box-sizing: inherit;\" />\n\n\n" + " <br style=\"box-sizing: inherit;\" />\n\n\n" + " You can be asked to be removed by going <a href=\"http://www.noflem.date/jfoqqvn/Opj5_SFF_jRHYZccPt3Qp1g0ljHZloZNOyXDjb0JTw8XHhojerqEmyefNIioyBHQKsYQNOrq2wI5EtqOulbttbhi_irrfSUPvFP21McyI0PcCw4ItD5UtfSkITxQp6MW.ofeReaGt1-VCYIC44BM2xP6EAjTUR03vqsqWuMCFiMu\">here </a>or write to us below</p>\n\n\n\n\n\n" + " <center style=\"box-sizing: inherit;\">\n\n\n" + " <style type=\"text/css\"><!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->\n\n\n" + " </style>\n\n\n" + " <span 28=\"\" 361=\"\" 7648=\"\" 8619=\"\" 872=\"\" alton=\"\" arnold=\"\" ave.=\"\" boynton=\"\" chapel=\"\" colonial=\"\" ct=\"\" data-sheets-userformat=\"{\" data-sheets-value=\"{\" fl=\"\" ga=\"\" oh=\"\" pa=\"\" road=\"\" s.=\"\" schoolhouse=\"\" south=\"\" st.=\"\" style=\"font-size: 11pt; font-family: Calibri, Arial;\" textspin:265=\"\" va=\"\" w.=\"\" wall=\"\">265 S. Schoolhouse St. Boynton Beach, FL 33435</span><span style=\"color: rgb(255, 255, 255); font-size: 4px;\">ing</span></center>\n\n\n" + " </td>\n\n\n" + " </tr>\n\n\n" + " </tbody>\n\n\n" + "</table>\n\n\n" + "</center>\n\n\n\n\n" + "</body>\n" + "</html>\n\n" + "--------------008794531541259352341780--\n"; final Pattern pattern = Pattern.compile(regex); final Matcher matcher = pattern.matcher(string); if (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