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
Processing...

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 = "(?<OpenTag>[\\<]+td[\\>]+)(?<Contents>[\\w\\/\\(\\)\\[\\]\\.\\&\\:\\;\\s]*?)(?<CloseTag>[\\<]+[\\/]+[td]+[\\>]+)"; final String string = "<br />\n" + "<span class=\"RptTitle\"><input id=\"chkPromisDataLog\" type=\"checkbox\" name=\"chkPromisDataLog\" checked=\"checked\" onclick=\"showOnOffPromisLog();\" /><label for=\"chkPromisDataLog\">Promis Processing data log [83508442.1].</label></span>\n" + "<div id=\"divPromisDataLog\" style=\"display: none;\">\n" + " <table id=\"tblPromisDataLog\" cellspacing=\"0\" cellpadding=\"0\" width=\"100%\" border=\"0\" class=\"table\">\n" + " <tr>\n" + " <td width=\"60%\"></td>\n" + " <td>\n" + " <a class=\"textnormal\" href=\"javascript:popwnd=window.open('../Tools/ExportExcel.aspx?KEY=LOT_GEN_PROMIS','popwnd','status=no,toolbar=Yes,menubar=Yes,location=no,scrollbars=yes,resizable=Yes');popwnd.focus()\">\n" + " Export to Excel\n" + " </a>\n" + " </td>\n" + " </tr>\n" + " <tr>\n" + " <td colspan=\"2\">\n" + " <table cellspacing=\"0\" rules=\"all\" border=\"1\" id=\"dgPromisDataLog\" style=\"border-color: Black; border-collapse: collapse;\">\n" + " <tr class=\"rptDetailsHeaderMgt\" align=\"center\">\n" + " <td>LotID</td>\n" + " <td>Hist Stage</td>\n" + " <td>Datein</td>\n" + " <td>Dateout</td>\n" + " <td>Qtyin</td>\n" + " <td>Qtyout</td>\n" + " <td>M/C ID</td>\n" + " <td>Emp TrackOut</td>\n" + " <td>Hold Code</td>\n" + " <td>Hold Reason</td>\n" + " <td>Staging (Hrs)</td>\n" + " </tr>\n" + " <tr class=\"rptDetailsItemMgt\" align=\"center\" style=\"white-space: nowrap;\">\n" + " <td>83508442.1</td>\n" + " <td>\n" + " <a\n" + " href=\"javascript:popwnd=window.open('LotGen_Dtl.aspx?iDate=04/09/2021 09:07:07 PM&amp;amp;oDate=04/10/2021 03:47:59 PM&amp;amp;oLotid=83508442.1&amp;amp;oStage=C-WFRPROCS&amp;amp;oLastRow=N','popwnd','width=900,height=600,status=no,toolbar=no,menubar=no,location=no,scrollbars=yes,top=100,right=50,left=50');popwnd.focus();\"\n" + " >\n" + " C-WFRPROCS\n" + " </a>\n" + " </td>\n" + " <td>4/9/2021 9:07:07 PM</td>\n" + " <td>4/10/2021 3:47:59 PM</td>\n" + " <td>0</td>\n" + " <td>9</td>\n" + " <td></td>\n" + " <td>10911700</td>\n" + " <td>&nbsp;</td>\n" + " <td>&nbsp;</td>\n" + " <td>18.68</td>\n" + " </tr>\n" + " </table>\n" + " </td>\n" + " </tr>\n" + " </table>\n" + "</div>"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); 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