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]{1}[12345689]{1}[0-9]{1}[0-9]{7}$"; final String string = "0112440767\n" + "0112575409\n" + "0112324846\n" + "0112434545\n" + "0112574651\n" + "0112421395\n" + "0112914215\n" + "0112447378\n" + "0112687141\n" + "0112431766\n" + "0114817240\n" + "0112810828\n" + "0112573296\n" + "0112580403\n" + "0112502437\n" + "0112449460\n" + "0112347856\n" + "0112421299\n" + "0112685633\n" + "0112575659\n" + "0112522545\n" + "0112330446\n" + "0112508512\n" + "0112692055\n" + "0112449631\n" + "0112336517\n" + "0112324924\n" + "0112335561\n" + "0112435306\n" + "0112436644\n" + "0112501030\n" + "0112522549\n" + "0112685773\n" + "0112686691\n" + "0112431174\n" + "0372238001\n" + "0112431405\n" + "0112432681\n" + "0112584173\n" + "0112584961\n" + "0112421464\n" + "0112320052\n" + "0112596747\n" + "0112324724\n" + "0112448612\n" + "0112433022\n" + "0112422473\n" + "0112338162\n" + "0112508100\n" + "0112438836\n" + "0112329161\n" + "0112440591\n" + "0112986417\n" + "0112435780\n" + "0372224138\n" + "0112431000\n" + "0112335836\n" + "0112301337\n" + "0112437936\n" + "0112334624\n" + "0112588884\n" + "0112432575\n" + "0112434683\n" + "0112589489\n" + "0372229141\n" + "0112503650\n" + "0112325225\n" + "0112330523\n" + "0112431531\n" + "0112434047\n" + "0112433495\n" + "0112325473\n" + "0112436311\n" + "0112323014\n" + "0112593973\n" + "0112582785\n" + "0112433286\n" + "0112502016\n" + "0112446699\n" + "0112816053"; 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