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

/
/
gu

Test String

Substitution

Processing...

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 = "[\\x{1f300}-\\x{1f5ff}\\x{1f900}-\\x{1f9ff}\\x{1f600}-\\x{1f64f}\\x{1f680}-\\x{1f6ff}\\x{2600}-\\x{26ff}\\x{2700}-\\x{27bf}\\x{1f1e6}-\\x{1f1ff}\\x{1f191}-\\x{1f251}\\x{1f004}\\x{1f0cf}\\x{1f170}-\\x{1f171}\\x{1f17e}-\\x{1f17f}\\x{1f18e}\\x{3030}\\x{2b50}\\x{2b55}\\x{2934}-\\x{2935}\\x{2b05}-\\x{2b07}\\x{2b1b}-\\x{2b1c}\\x{3297}\\x{3299}\\x{303d}\\x{00a9}\\x{00ae}\\x{2122}\\x{23f3}\\x{24c2}\\x{23e9}-\\x{23ef}\\x{25b6}\\x{23f8}-\\x{23fa}]"; final String string = "β€οΈπ“‰π‘’π“ˆπ“‰π’Ύπ“ƒπ‘”β€οΈ"; final String subst = ""; final Pattern pattern = Pattern.compile(regex, Pattern.UNICODE_CASE); final Matcher matcher = pattern.matcher(string); // The substituted value will be contained in the result variable final String result = matcher.replaceAll(subst); System.out.println("Substitution result: " + result); } }

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