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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

/
/
gmi

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 = "[[:alpha:]]{6}[0-9]{2}[abcdehlmprst]{1}[[:digit:]]{2}[a-z]{1}[0-9]{3}[[:alpha:]]{1}"; final String string = "6x7 456 78993 45528 8382 837372 82 128 8282 82 828282 28 8282635372892 838 \n" + "Lorem ipsum dolor 335-5555555 sit amet, consectetur adipisci5555555555 elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua.\n\n" + "Ut enim ad minim veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur. 3835555555 Quis aute iure reprehenderit in voluptate 555/555555velit esse cillum dolore eu fugiat nulla pariatur. 43434734 343 3 464 56 5 65 6 5 757 676\n\n" + "Excepteur sint obcaecat cupiditat non RSSNDR74D04A271P proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consec 234 546 367 2789 tetur adipisci elit,347/5555555 sed eiusm 565437 od tempor incidunt ut labore et dolore magna aliqua. Ut enim ad minim\n\n\n" + "Ut enim ad minim 555-555555veniam, quis rssndr74d04a271u nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur. Quis aute iure r328 5555555 eprehenderit in volup6767676767 6767676767tate 555 555555velit esse cillum dolore eu fugiat nulla pariatur.\n\n" + "Excepteur sint obcae67676767676767676cat rssndr74D04A271U cupidita34567893 t non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. 388.555555 Lorem rSsndr74d04a271u ipsum dolor sit amet, consectetur adipisci elit, sed eiusmod tempor incidunt ut labore et dolore magna a6767676767 32252525 353535 5353535liqua. Ut enim ad minim"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE); 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