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 = "(?<=statement: )([ _\\-|0-9,:;\\.=A-Za-z\\(\\)\"\\n\\t'].+?)(?=\\d{4}-\\d{2}-\\d{2}|$)"; final String string = "2015-05-20 02:27:41 GMT 555bbcfd.3685 cmsmgt001 LOG: statement: COMMIT\n" + "2015-05-20 02:27:41 GMT 555bcdb3.3908 cmsmgt001 LOG: statement: BEGIN\n" + "2015-05-20 02:27:41 GMT 555bcdb3.3908 cmsmgt001 LOG: statement: SET search_path TO pC35126D4,public;\n" + "2015-05-20 02:27:41 GMT 555bcdb3.3908 cmsmgt001 LOG: statement: SELECT cms_images.id, cms_images.url, cms_images.uploaded_filename, cms_images.size, cms_images.width, cms_images.height, cms_images.ext, cms_images.data, cms_images.hash_sha1, cms_images._created, cms_images._modified, cms_images._hash \n" + "FROM cms_images \n" + "WHERE cms_images.id = 912148443466212857204723 \n" + "LIMIT 1\n" + "2015-05-20 02:27:41 GMT 555bcdb3.3908 cmsmgt001 LOG: statement: ROLLBACK\n" + "2015-05-20 02:27:41 GMT 555bbb9f.364b cmsmgt001 LOG: statement: BEGIN\n" + "2015-05-20 02:27:41 GMT 555bbb9f.364b cmsmgt001 LOG: statement: SET search_path TO pC35126D4,public;\n" + "2015-05-20 02:27:41 GMT 555bbb9f.364b cmsmgt001 LOG: statement: SELECT cms_images.id, cms_images.url, cms_images.uploaded_filename, cms_images.size, cms_images.width, cms_images.height, cms_images.ext, cms_images.data, cms_images.hash_sha1, cms_images._created, cms_images._modified, cms_images._hash \n" + "FROM cms_images \n" + "WHERE cms_images.hash_sha1 = '035f3fac7dd057bac10f2203ecb8ea6a97d2116c' \n" + "LIMIT 1\n" + "2015-05-20 02:27:41 GMT 555bbb9f.364b cmsmgt001 LOG: statement: ROLLBACK\n" + "2015-05-20 02:27:41 GMT 555bc0dd.372c cmsmgt001 LOG: statement: BEGIN\n" + "2015-05-20 02:27:41 GMT 555bc0dd.372c cmsmgt001 LOG: statement: SET search_path TO pC35126D4,public;\n" + "2015-05-20 02:27:41 GMT 555bc0dd.372c cmsmgt001 LOG: statement: SELECT cms_images.id, cms_images.url, cms_images.uploaded_filename, cms_images.size, cms_images.width, cms_images.height, cms_images.ext, cms_images.data, cms_images.hash_sha1, cms_images._created, cms_images._modified, cms_images._hash \n" + "FROM cms_images \n" + "WHERE cms_images.hash_sha1 = '035f3fac7dd057bac10f2203ecb8ea6a97d2116c' \n" + "LIMIT 1\n" + "2015-05-20 02:27:41 GMT 555bc0dd.372c cmsmgt001 LOG: statement: ROLLBACK\n" + "2015-05-20 02:27:41 GMT 555bbc90.3665 cmsmgt001 LOG: statement: BEGIN\n" + "2015-05-20 02:27:41 GMT 555bbc90.3665 cmsmgt001 LOG: statement: SET search_path TO pC35126D4,public;\n" + "2015-05-20 02:27:41 GMT 555bbc90.3665 cmsmgt001 LOG: statement: SELECT cms_celebrities.id, cms_celebrities.vendor, cms_celebrities.tms_person_id, cms_celebrities.birth_year, cms_celebrities.first_name, cms_celebrities.last_name, cms_celebrities.display_name, cms_celebrities.image_id, cms_celebrities._created, cms_celebrities._modified, cms_celebrities._hash \n" + "FROM cms_celebrities \n" + "WHERE cms_celebrities.tms_person_id = '47088' \n" + "LIMIT 1\n" + "2015-05-20 02:27:41 GMT 555bbc90.3665 cmsmgt001 LOG: statement: ROLLBACK\n" + "2015-05-20 02:27:41 GMT 555bbcc8.3670 cmsmgt001 LOG: statement: BEGIN\n" + "2015-05-20 02:27:41 GMT 555bbcc8.3670 cmsmgt001 LOG: statement: SET search_path TO pC35126D4,public;\n" + "2015-05-20 02:27:41 GMT 555bbcc8.3670 cmsmgt001 LOG: statement: select nextval('\"cms_celebrities_id_seq\"')\n" + "2015-05-20 02:27:41 GMT 555bbcc8.3670 cmsmgt001 LOG: statement: INSERT INTO cms_celebrities (id, vendor, tms_person_id, birth_year, first_name, last_name, display_name, image_id, _created, _modified, _hash) VALUES (1571, 'gracenote', '47088', 1925, 'Monique', 'Van Vooren', 'Monique Van Vooren', 1701, '2015-05-20T02:27:41.768803'::timestamp, '2015-05-20T02:27:41.768803'::timestamp, '2015-05-20 02:27:41.768803|7111|0.7293680991519143')\n" + "2015-05-20 02:27:41 GMT 555bbcc8.3670 cmsmgt001 LOG: statement: COMMIT\n" + "2015-05-20 02:27:41 GMT 555bbd8b.3698 cmsmgt001 LOG: statement: BEGIN\n" + "2015-05-20 02:27:41 GMT 555bbd8b.3698 cmsmgt001 LOG: statement: SET search_path TO pC35126D4,public;\n" + "2015-05-20 02:27:41 GMT 555bbd8b.3698 cmsmgt001 LOG: statement: SELECT cms_asset_celebrities.id, cms_asset_celebrities.asset_id, cms_asset_celebrities.celebrity_id, cms_asset_celebrities.role, cms_asset_celebrities.order_pos, cms_asset_celebrities._created, cms_asset_celebrities._modified, cms_asset_celebrities._hash \n" + "FROM cms_asset_celebrities \n" + "WHERE celebrity_id=1571 \n" + "LIMIT 1"; final Pattern pattern = Pattern.compile(regex, Pattern.DOTALL); 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