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 = "https?:\\/\\/\\S*\""; final String string = "{\"created_at\": \"Fri Aug 12 10:04:00 +0000 2016\", \"id\": 764039724818272256, \"text\": \"@theblaze https://t.co/TY9DlZ584c @realDonaldTrump \", \"in_reply_to_screen_name\": \"theblaze\", \"user\": {\"id\": 366636488, \"id_str\": \"366636488\", \"name\": \"GIL DUPUY\", \"screen_name\": \"DUPUY77\", \"location\": \"Miami\", \"url\": \"http://ggm-dupuy.com\", \"description\": \"Fashion photographer, love action and adventure, care for the less fortunate, don't tolerate any kind of racism regardless of race or religion\", \"verified\": false, \"followers_count\": 186, \"friends_count\": 446, \"utc_offset\": null, \"time_zone\": null, \"lang\": \"en\", \"default_profile_image\": false, \"following\": null, \"notifications\": null}, \"geo\": null, \"coordinates\": null, \"place\": {\"name\": \"Frontenac\", \"full_name\": \"Frontenac, MO\", \"country_code\": \"US\", \"country\": \"United States\", \"attributes\": {}}, \"retweet_count\": 0, \"favorite_count\": 0, \"extended_entities\": {\"media\": [{\"id\": 764039718237409281, \"id_str\": \"764039718237409281\", \"indices\": [27, 50], \"media_url\": \"http://pbs.twimg.com/media/CppqE1_UkAE2qFj.jpg\", \"media_url_https\": \"https://pbs.twimg.com/media/CppqE1_UkAE2qFj.jpg\", \"url\": \"https://t.co/TY9DlZ584c\", \"display_url\": \"pic.twitter.com/TY9DlZ584c\", \"expanded_url\": \"http://twitter.com/DUPUY77/status/764039724818272256/photo/1\", \"type\": \"photo\", \"sizes\": {\"medium\": {\"w\": 640, \"h\": 1136, \"resize\": \"fit\"}, \"large\": {\"w\": 640, \"h\": 1136, \"resize\": \"fit\"}, \"thumb\": {\"w\": 150, \"h\": 150, \"resize\": \"crop\"}, \"small\": {\"w\": 383, \"h\": 680, \"resize\": \"fit\"}}}]}, \"favorited\": false, \"retweeted\": false, \"possibly_sensitive\": false, \"lang\": \"und\"}"; 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