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

/
/
gm

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 = "^0(?:2(?:12|3[45789]|[45][1-9]|6[0-9]|7[0-8]|8[1235678]|9[1-5])|4(?:1[246]|2[46]))\\d{7}$"; final String string = "02481234567\n" + "02811234567\n" + "02821234567\n" + "02831234567\n" + "02351234567\n" + "02471234567\n" + "02781234567\n" + "02431234567\n" + "02441234567\n" + "02451234567\n" + "02461234567\n" + "02731234567\n" + "02781234567\n" + "02351234567\n" + "02851234567\n" + "02861234567\n" + "02881234567\n" + "02411234567\n" + "02421234567\n" + "02431234567\n" + "02451234567\n" + "02491234567\n" + "02581234567\n" + "02871234567\n" + "02121234567\n" + "02591234567\n" + "02681234567\n" + "02691234567\n" + "02371234567\n" + "02351234567\n" + "02381234567\n" + "02461234567\n" + "02471234567\n" + "02511234567\n" + "02521234567\n" + "02531234567\n" + "02711234567\n" + "02731234567\n" + "02741234567\n" + "02751234567\n" + "02121234567\n" + "02341234567\n" + "02391234567\n" + "02871234567\n" + "02911234567\n" + "02921234567\n" + "02951234567\n" + "02551234567\n" + "02561234567\n" + "02571234567\n" + "02931234567\n" + "02941234567\n" + "02761234567\n" + "02771234567\n" + "02711234567\n" + "02721234567\n" + "02121234567\n" + "02511234567\n" + "02531234567\n" + "02541234567\n" + "02611234567\n" + "02621234567\n" + "02631234567\n" + "02641234567\n" + "02651234567\n" + "02661234567\n" + "02671234567\n" + "02711234567\n" + "02751234567\n" + "02601234567\n" + "02701234567\n" + "04121234567\n" + "04141234567\n" + "04241234567\n" + "04161234567\n" + "04261234567\n" + "04271234567\n" + "02131234567"; 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