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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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 = "(Soft Offer Form - Speed Tool|Lead Gen - Enterprise Form|General Contact|Agency Partner Form|Content_Download|Soft Offer Form - Webinar Registrations|General Contact|Personal Contact)"; final String string = "Zendesk Web Widget\n" + "Scroll Depth\n" + "Demandbase\n" + "Campaign JULY3FREE\n" + "Personal Contact\n" + "Outbound Link\n" + "sites-copy\n" + "Google Optimize\n" + "sftp_user\n" + "add_install\n" + "backups\n" + "CTA - Above Fold\n" + "sites-new-create\n" + "page_performance\n" + "Phone\n" + "CTA - Top Nav\n" + "password_protect\n" + "Soft Offer Form - Speed Tool\n" + "Video\n" + "Soft Offer Form - Content Downloads\n" + "sites-new-copy\n" + "theme-demo\n" + "migration_checklist\n" + "General Contact\n" + "A/B Test\n" + "Buttons\n" + "wp-cli\n" + "account_user\n" + "Exit Intent Signup - Annual\n" + "portal_support\n" + "Account Name Suggestion\n" + "Lead\n" + "CTA - CTA Block\n" + "signup-gtm\n" + "hello-bar\n" + "signup\n" + "theme-download\n" + "signup_ecommerce\n" + "sites-convert-SE\n" + "Lead Gen - Enterprise Form\n" + "LiveChat\n" + "upgrade_plan\n" + "genesis-download\n" + "automated_migration\n" + "Agency Partner Form\n" + "undefined\n" + "sites-add-group\n" + "sites-edit-group\n" + "Lead Gen - Contact Us Form\n" + "sites-new-move\n" + "chat_window\n" + "ges-clicked\n" + "support-article-build-site\n" + "support-article-get-started\n" + "sites-move-SE\n" + "Content_Download\n" + "Opportunity\n" + "activity_log\n" + "Soft Offer Form - Webinar Registrations\n" + "ges-learn-more\n" + "studiopress-forum\n" + "studiopress-slack\n" + "studiopress-facebook\n" + "Scroll+Depth\n" + "Stick Metric\n" + "Bizzabo: WP Engine Summit 2019 Europe"; 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