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

/
/
g

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 = "Vortag<\\/td>.*?\\n?.*?<td>(-?\\d+\\.?\\d+)<"; final String string = "\n" + " <div id=\"divInfo\" class=\"cInfo\">\n" + " <table border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"100%\" height=\"100%\">\n" + " <tr>\n" + " <td align=\"center\">\n" + " <table class=\"tablebody\" border=\"0\" width=\"100%\">\n" + " <tr>\n" + " <td class=\"cNavInfo\">Online-Werte &raquo; Wechselrichter-Übersicht</td>\n" + " </tr>\n" + " </table>\n" + " </td>\n" + " </tr>\n" + " <tr><td>&nbsp;</td></tr>\n\n" + " <tr>\n" + " <td class=\"tablebody\">\n" + " <table width=\"100%\" border=\"0\">\n" + " <tr class=\"tablehead\">\n" + " <td colspan=\"7\"><strong>Summe aller Wechselrichter</strong></td>\n" + " </tr>\n" + " <tr>\n" + " <td class=\"tablehead\">Bezeichnung</td>\n" + " <td class=\"tablehead\">Wert</td>\n" + " <td class=\"tablehead\">Einheit</td>\n" + " <td>&nbsp;</td>\n" + " <td class=\"tablehead\">Bezeichnung</td>\n" + " <td class=\"tablehead\">Wert</td>\n" + " <td class=\"tablehead\">Einheit</td>\n" + " </tr>\n" + " <tr>\n" + " <td>Aktuelle Leistung</td>\n" + " <td><b>8.404</b></td>\n" + " <td>kW</td>\n" + " <td>&nbsp;</td>\n" + " <td>Aktuelle Monatsenergie</td>\n" + " <td>1750.106</td>\n" + " <td>kWh</td>\n" + " </tr>\n" + " <tr>\n" + " <td>Aktuelle Tagesenergie</td>\n" + " <td><b>15.328</b></td>\n" + " <td>kWh</td>\n" + " <td>&nbsp;</td>\n" + " <td>Aktuelle Jahresenergie</td>\n" + " <td>2352.722</td>\n" + " <td>kWh</td>\n" + " </tr>\n" + " <tr>\n" + " <td>Tagesenergie Vortag</td>\n" + " <td>148.736</td>\n" + " <td>kWh</td>\n" + " <td>&nbsp;</td>\n" + " <td>Gesamtenergie</td>\n" + " <td>235217.714</td>\n" + " <td>kWh</td>\n" + " </tr>\n" + " </table>\n" + " </td>\n" + " </tr>\n" + " <tr><td>&nbsp;</td></tr>\n\n" + " <tr>\n" + " <td>\n" + " <table width=\"100%\" border=\"0\" class=\"tablebody\">\n" + " <tr class=\"tablehead\">\n" + " <td colspan=\"5\"><strong>Übersicht einzelner Wechselrichter</strong></td>\n" + " </tr>\n" + " <tr class=\"tablehead\">\n" + " <td width=\"10%\">Adresse</td>\n" + " <td width=\"10%\">Leistung</td>\n" + " <td width=\"15%\">Einheit</td>\n" + " <td width=\"10%\">Tagesenergie</td>\n" + " <td width=\"55%\">Einheit</td>\n" + " </tr>\n" + "<tr><td CLASS=\"cLink\"><A HREF=\"/httpGpmGotoWrID.cgi?0\">1</A></td><td>2505</td><td>W</td><td>4.536</td><td>kWh</td></tr><tr><td CLASS=\"cLink\"><A HREF=\"/httpGpmGotoWrID.cgi?1\">2</A></td><td>2552</td><td>W</td><td>4.880</td><td>kWh</td></tr><tr><td CLASS=\"cLink\"><A HREF=\"/httpGpmGotoWrID.cgi?2\">3</A></td><td>693</td><td>W</td><td>1.304</td><td>kWh</td></tr><tr><td CLASS=\"cLink\"><A HREF=\"/httpGpmGotoWrID.cgi?3\">4</A></td><td>2524</td><td>W</td><td>4.608</td><td>kWh</td></tr>\n" + " </table>\n" + " </td>\n" + " </tr>\n" + " <tr><td>&nbsp;</td></tr>\n" + " <tr><td align=\"center\">&nbsp;</td></tr>\n" + " <tr><td>&nbsp;</td></tr>\n" + " <tr><td align=\"center\">&nbsp;</td></tr>\n" + " <tr><td height=\"100%\">&nbsp;</td></tr>\n" + " <tr>\n" + " <td align=\"center\">\n" + " <table width=\"100%\" border=\"0\" class=\"tablebody\">\n" + " <tr>\n" + " <td>Anmerkung: Die hervorgehobenen Werte werden alle 20s aktualisiert.</td>\n" + " </tr>\n" + " </table>\n" + " </td>\n" + " </tr>\n" + " <tr><td>&nbsp;</td></tr>\n" + " <tr><td>&nbsp;</td></tr>\n" + " </table>\n\n" + "<div class=\"x-align-right\">\n" + " <div class=\"cStatuszeile\">&nbsp;Systemzeit&nbsp;&nbsp;10:35:57 / 24.02.2018&nbsp;</div>\n" + "</div>\n" + " </div>\n" + " </body>\n" + "</html>"; final Pattern pattern = Pattern.compile(regex); 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