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

/
/
gmx

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 = "^\n" + "(?=.*?[0-9]) #содержит хотябы одну цифру\n" + "(?=.*?[A-Z]) #содержит хотябы одну латинскую прописную букву\n" + "(?=.*?[a-z]) #содержит хотябы одну латинскую строчную букву\n" + "(?=.*?[^0-9A-Za-z]) #содержит хотябы один знак пунктуации: !\"#$%&'()*+,-./:;<=>?@[\\]^_`\\{|\\}~\n" + "#не имеют 6 и более подряд совпадающих символов типа \"zzzzzz\", \"000000\"\n" + "(?!.*?(.)\\1{5,})\n" + "#не имеет \"плохих\" последовательностей типа \"123456\", \"abcdef\", \"qwerty\"\n" + "(?!.*?123456)\n" + "(?!.*?(?i:qwerty|asdfgh|zxcvbn|qazwsx|abcdef))\n" + "#допускаются только цифры, английские буквы и знаки пунктуации\n" + "[\\x20-\\x7e]{8,72} #ограничения по кол-ву символов\n" + "$"; final String string = "_012345_zZ\n" + "_123456_zZ\n" + "_00000_zZ\n" + "_000000_zZ\n" + "^@},hJu>[4Bo7TGX\n" + "_}24I:9t58Tu?m@e\n" + "|YlzEc|1\n" + "#m_4xF%t\"Bu5jeb$\n" + "12345678aA@ \n" + "12345678 aA@\n" + " 12345678aA@\n" + "123Qwerty45678aA\n" + "^@},^@},^@},\n" + "AbCdEfGhIi\n" + "abcdefgh123\n" + "ABCDEFGH1234"; 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