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

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "matei 140 for "; final String string = "<?php\n" + "$days = 7; // Eine Woche\n" + "$activity = \"Laufen\"; // Trainingsart\n" + "$duration = 30; // Minuten pro Tag\n" + "for ($day = 1; $day <= $days; $day++) {\n" + " echo \"Am Tag $day bist du $duration Minuten $activity gewesen.<br>\";\n" + "}\n\n" + "$activities = [\"Laufen\", \"Schwimmen\", \"Radfahren\", \"Yoga\", \"Krafttraining\"];\n" + "$motivation = 5; // Skala 1-10\n" + "$goal = \"fit werden\"; // Ziel\n" + "$duration = 30; // Minuten pro Tag\n" + "$days = 7; // Eine Woche\n" + "for ($day = 1; $day <= $days; $day++) {\n" + " $activity = $activities[($day-1)%count($activities)];\n" + " echo \"<br>Tag $day: Heute machst du $duration Minuten $activity, Motivation: $motivation/10, Ziel: $goal.\";\n" + " $motivation++;\n\n" + " if($day == $days){\n" + " echo \"<br>\";\n" + "}\n" + "}\n\n\n" + "function wochenplan($activities, $days, $dauerProTag) {\n" + " $gesamt = 0;\n" + " for ($i = 1; $i <= $days; $i++) {\n" + " $activity = $activities[array_rand($activities)];\n" + " echo \"<br> Tag $i: $activity für $dauerProTag Minuten.\";\n" + " $gesamt += $dauerProTag;\n" + " if($i == $days){\n" + " echo \"<br><br>\";\n" + " }\n" + " }\n" + " return $gesamt;\n" + "}\n" + "$activities = [\"Laufen\", \"Schwimmen\", \"Radfahren\", \"Yoga\", \"Krafttraining\"];\n" + "$gesamt = wochenplan($activities, 7, 30);\n" + "echo \"Gesamtzeit: $gesamt Minuten.\";\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"; 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