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 = "1"; final String string = "Telephone,Date,Zip\n" + "1-917-887-9281,08/02/2015,61022\n" + "1-614-122-0700,07/12/2013,51642\n" + "1-401-310-3354,04/07/2015,86161\n" + "1-776-738-7726,01/12/2014,61294\n" + "1-512-994-9175,02/02/2014,89104\n" + "1-401-546-6134,12/01/2014,89820\n" + "1-168-498-8484,21/06/2015,49526\n" + "1-778-253-5497,14/01/2015,98123\n" + "1-404-432-9739,10/09/2014,74122\n" + "1-629-563-3288,26/10/2013,47379\n" + "1-399-794-0834,21/05/2015,69891\n" + "1-210-801-0619,18/06/2015,79134\n" + "1-789-756-2201,10/07/2014,34644\n" + "1-673-598-4221,23/06/2015,89506\n" + "1-898-944-9344,02/05/2014,78701\n" + "1-401-926-2823,16/11/2014,38679\n" + "1-673-176-5233,03/09/2014,83277\n" + "1-670-119-0983,13/12/2013,44606\n" + "1-929-431-8036,21/06/2015,76118\n" + "1-941-986-2478,02/04/2014,38809\n" + "1-965-311-5298,13/02/2015,67390\n" + "1-966-241-2160,19/10/2014,12024\n" + "1-171-218-2878,16/05/2014,89757\n" + "1-579-696-3951,07/05/2015,88783\n" + "1-880-379-8249,27/05/2014,84169\n" + "1-729-730-5787,25/11/2014,50579\n" + "1-401-281-4234,28/01/2014,67149\n" + "1-136-687-0372,01/01/2015,88760\n" + "1-324-552-7773,06/12/2013,96232\n" + "1-460-954-6974,09/10/2014,44191\n" + "1-401-535-7233,17/12/2013,15725\n" + "1-177-661-0599,11/08/2015,58068\n" + "1-958-872-4163,14/02/2014,65903\n" + "1-751-976-1258,19/09/2015,33419\n" + "1-970-750-5604,08/03/2015,49727\n" + "1-401-311-1655,21/06/2015,16233\n" + "1-368-460-0652,14/04/2015,46683\n" + "1-561-904-8040,05/11/2013,84159\n" + "1-434-990-8299,19/01/2014,99741\n" + "1-405-919-6493,19/03/2014,92955\n" + "1-273-356-8382,03/03/2015,94595\n" + "1-969-466-0391,02/06/2014,28607\n" + "1-365-885-5483,09/07/2015,72921\n" + "1-479-782-0491,08/09/2015,90440\n" + "1-337-274-2635,09/01/2014,90487\n" + "1-126-912-0604,29/06/2015,77501\n" + "1-528-770-1186,16/10/2014,12597\n" + "1-251-239-7048,10/11/2013,56237\n" + "1-754-230-8264,16/11/2014,35546\n" + "1-257-642-5660,25/10/2014,86283\n" + "1-633-547-7089,26/04/2015,30792\n" + "1-161-604-0959,28/01/2015,83378\n" + "1-497-635-0092,26/07/2015,95635\n" + "1-926-635-0188,15/04/2014,95133\n" + "1-288-287-3450,08/06/2014,21739\n" + "1-981-694-3820,16/12/2014,12878\n" + "1-727-533-4754,23/05/2015,66255\n" + "1-310-697-1783,01/03/2014,94502\n" + "1-401-356-8358,10/11/2013,17172\n" + "1-264-760-2541,27/10/2014,61896\n" + "1-462-318-2842,14/12/2014,86195"; 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