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
Processing...

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 = "\"geo\":\\{\"type\":\"Point\",\"coordinates\":\\[(?P<latitude>[^,\\]\\}]+),(?P<longitude>[\\d\\.\\-]+)"; final String string = "{\"created_at\":\"Thu Jul 16 04:46:24 +0000 2015\",\"id\":621541368599457792,\"id_str\":\"621541368599457792\",\"text\":\"k imma shower and gn \\n\\ud83d\\ude2a matthew have fun wwith your \\\"fans \\\" babe \\ud83d\\udc94\",\"source\":\"\\u003ca href=\\\"http:\\/\\/twitter.com\\/download\\/iphone\\\" rel=\\\"nofollow\\\"\\u003eTwitter for iPhone\\u003c\\/a\\u003e\",\"truncated\":false,\"in_reply_to_status_id\":null,\"in_reply_to_status_id_str\":null,\"in_reply_to_user_id\":null,\"in_reply_to_user_id_str\":null,\"in_reply_to_screen_name\":null,\"user\":{\"id\":2842045238,\"id_str\":\"2842045238\",\"name\":\"d-u-y-e-n\",\"screen_name\":\"_duyxnny_\",\"location\":\"\\u2708\\ufe0friverside,california - \",\"url\":\"http:\\/\\/twitter.com\\/_duyxnny_\\/status\\/610692899173302273\",\"description\":\"im ugly ...\",\"protected\":false,\"verified\":false,\"followers_count\":605,\"friends_count\":368,\"listed_count\":9,\"favourites_count\":19255,\"statuses_count\":15125,\"created_at\":\"Mon Oct 06 06:24:26 +0000 2014\",\"utc_offset\":-25200,\"time_zone\":\"Pacific Time (US & Canada)\",\"geo_enabled\":true,\"lang\":\"en\",\"contributors_enabled\":false,\"is_translator\":false,\"profile_background_color\":\"3B94D9\",\"profile_background_image_url\":\"http:\\/\\/pbs.twimg.com\\/profile_background_images\\/598623992367304705\\/IsZyk_eZ.jpg\",\"profile_background_image_url_https\":\"https:\\/\\/pbs.twimg.com\\/profile_background_images\\/598623992367304705\\/IsZyk_eZ.jpg\",\"profile_background_tile\":true,\"profile_link_color\":\"9266CC\",\"profile_sidebar_border_color\":\"000000\",\"profile_sidebar_fill_color\":\"000000\",\"profile_text_color\":\"000000\",\"profile_use_background_image\":true,\"profile_image_url\":\"http:\\/\\/pbs.twimg.com\\/profile_images\\/621199859144495105\\/G8x0fMV-_normal.jpg\",\"profile_image_url_https\":\"https:\\/\\/pbs.twimg.com\\/profile_images\\/621199859144495105\\/G8x0fMV-_normal.jpg\",\"profile_banner_url\":\"https:\\/\\/pbs.twimg.com\\/profile_banners\\/2842045238\\/1436912478\",\"default_profile\":false,\"default_profile_image\":false,\"following\":null,\"follow_request_sent\":null,\"notifications\":null},\"geo\":{\"type\":\"Point\",\"coordinates\":[33.958571,-117.434168]},\"coordinates\":{\"type\":\"Point\",\"coordinates\":[-117.434168,33.958571]},\"place\":{\"id\":\"6ba08e404aed471f\",\"url\":\"https:\\/\\/api.twitter.com\\/1.1\\/geo\\/id\\/6ba08e404aed471f.json\",\"place_type\":\"city\",\"name\":\"Riverside\",\"full_name\":\"Riverside, CA\",\"country_code\":\"US\",\"country\":\"United States\",\"bounding_box\":{\"type\":\"Polygon\",\"coordinates\":[[[-117.523867,33.85216],[-117.523867,39.79369],[-84.097028,39.79369],[-84.097028,33.85216]]]},\"attributes\":{}},\"contributors\":null,\"retweet_count\":0,\"favorite_count\":0,\"entities\":{\"hashtags\":[],\"trends\":[],\"urls\":[],\"user_mentions\":[],\"symbols\":[]},\"favorited\":false,\"retweeted\":false,\"possibly_sensitive\":false,\"filter_level\":\"low\",\"lang\":\"en\",\"timestamp_ms\":\"1437021984611\"}"; final Pattern pattern = Pattern.compile(regex); final Matcher matcher = pattern.matcher(string); if (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