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

/
/
msg

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 = ".*Aussen.*?<\\/code>.*?([^<]*)"; final String string = "<html> <head><title>Modbus Mapping - Guntamatic</title>\n" + "<meta charset=\"iso-8859-1\"><style>table { border-collapse:collapse; text-align: center; }table, td, th { border:1px solid black; padding: 2px; }th {vertical-align: top; }\n" + "</style></head><body><h1>Modbus Mapping</h1>\n" + "<table> \n" + "<thead> <tr><th>Id</th><th>Register</th><th>Adresse</th><th>Typ</th><th>Einheit</th><th>Größe<br>(Byte)</th><th>Name</th><th>aktueller Wert</th></tr> </thead> <tbody> <tbody> <tr><td>0</td><td>0x4001</td><td>0x4000</td><td>string</td><td> </td><td>4</td><td>Betrieb</td><td><code>0x41555300</code>AUS</tr> <tr><td>1</td><td>0x4003</td><td>0x4002</td><td>float</td><td>°C</td><td>4</td><td>Aussentemperatur</td><td><code>0x40f1d8e2</code>7.56</td></tr> <tr><td>3</td><td>0x4007</td><td>0x4006</td><td>float</td><td>°C</td><td>4</td><td>Kesseltemperatur</td><td><code>0x4253c0e5</code>52.94</td></tr> </tbody></table> <h2>Erweiterte Texte</h2><table> <thead> <tr><th>Id</th><th>Register</th><th>Adresse</th><th>Größe<br>(Byte)</th><th>Name</th><th>aktueller Wert</th></tr> </thead> </tbody></table></body></html>"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | 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