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 = "^(https?:\\/\\/)? #протокол\n" + "([\\w-]{1,32}\\.[\\w-]{1,32}) #домен\n" + "[^\\s@]* #любой не пробельный символ + @\n" + "$\n"; final String string = "/********************** yes *****************/\n" + "http://yan-dex.ru\n" + "http://asd-asd.ru\n" + "sdf-sdf.ru\n" + "http://sdfsdf.ru/sadasds-sadsad/sadsad\n" + "http://sdfsdf.ru/sadasds-sadsad/sadsad?page=2\n" + "http://sdfsdf.ru/sadasds-sadsad/sadsad?page=2&other=1\n" + "sdfsdf.ru/sadasds-sadsad/sadsad?page=2&other=1\n" + "http://sdfsdf.ru/sadasds/sadsad?page=2&other=1\n" + "https://regex101.com/r/tM7Pmr/1\n" + "http://regexpres.narod.ru/calculator.html\n" + "http://regexpres.narod.ru/calculator.htm\n" + "http://regexpres.narod.ru/calculator.php\n" + "http://regexpres.narod.ru/index.php\n" + "http://regexpres.narod.ru/index\n" + "https://jsfiddle.net/3b0khwhasd6/\n" + "https://lenta.ru/articles/2017/03/06/ruvlogs/\n" + "https://www.youtube.com/watch?v=PDxVcTWVIck\n" + "www.youtube.com/watch?v=PDxVcTWVIck\n\n" + "https://zakon.ru/blog/2017/03/06/delo_o_denezhnyh_generatorah_i_udobnom_sude__p-v_protiv_ikea_opredelenie_skgd_vs_ot_17012017_36-kg16\n" + "https://zakon.ru/konstitucionnyj_sud_rf\n\n" + "zakon.ru/blog/2017/03/06/delo_o_denezhnyh_generatorah_i_udobnom_sude__p-v_protiv_ikea_opredelenie_skgd_vs_ot_17012017_36-kg16\n" + "https://zakon.ru/konstitucionnyj_sud_rf\n\n\n" + "/********************** not *****************/\n" + "4234czxc\n" + "sdfsdf\n" + "sdsad.rturturturt/fsdfsd@sd"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.COMMENTS); 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