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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 = "^acl\\s(?P<acl_name>[^.\\s]+)\\s+\\w+\\s(?P<dest_domain>[-a-zA-Z0-9@:%._\\+~#=]{1,256})"; final String string = "# log_mime_hdrs on\n\n" + "# Turn off caching\n" + "cache deny all\n\n" + "# Disable ICMP pinger\n" + "pinger_enable off\n\n" + "# Consult local hosts file\n" + "# hosts_file /etc/hosts\n\n" + "# Set squid pidfile location\n" + "pid_filename /var/run/squid/squid.pid\n\n" + "# Set squid access logging location and use more human-readable format\n" + "access_log stdio:/var/log/squid/access_combined.log logformat=combined\n" + "access_log daemon:/var/log/squid/access_default.log logformat=squid\n\n" + "# Set cache logging location\n" + "cache_log /var/log/squid/cache.log\n\n" + "# Do not allow caching me\n" + "F5 BIG-IQ\n" + "# Mgmt Self-Outside\n" + "acl $masked_host$ src 20.20.30.4/32 160.11.44.56/32 # F5 BIG-IQ\n" + "acl $masked_host$ src 20.20.30.132/32 160.11.44.184/32 # F5 BIG-IQ\n\n" + "# External F5\n" + "# Mgmt Self-Outside Floating-Outside Self-Inside Floating-Inside\n" + "acl $masked_host$ src 160.11.42.8/32 192.160.223.74/32 160.11.42.142/32 # External F5 BIG-IP\n" + "acl $masked_host$ src 160.11.43.8/32 192.160.224.74/32 160.11.43.142/32 # External F5 BIG-IP\n\n" + "# External F5\n" + "# Mgmt Self-Outside Floating-Outside Self-Inside Floating-Inside\n" + "acl $masked_host$ src 160.11.42.4/32 192.160.223.4/32 192.160.223.46/32 160.11.42.132/32 160.11.42.140/32 # External F5 BIG-IP\n" + "acl $masked_host$ src 160.11.42.6/32 192.160.223.5/32 192.160.223.46/32 160.11.42.138/32 160.11.42.140/32 # External F5 BIG-IP\n" + "acl $masked_host$ src 160.11.43.4/32 192.160.224.4/32 192.160.224.46/32 160.11.43.132/32 160.11.43.140/32 # External F5 BIG-IP\n" + "acl $masked_host$ src 160.11.43.6/32 192.160.224.5/32 192.160.224.46/32 160.11.43.138/32 160.11.43.140/32 # External F5 BIG-IP\n\n" + "acl github_domains dstdomain .github.com\n" + "acl clamav_domains dstdomain .clamav.net\n" + "acl mozilla_org_domains dstdomain .mozilla.org\n" + "acl mozilla_net_domains dstdomain .mozilla.net\n" + "acl mozilla_com_domains dstdomain .mozilla.com\n" + "acl google_domains dstdomain .google.com\n" + "acl google_apis_domains dstdomain .googleapis.com\n" + "acl powershell_domains dstdomain .digicert.com"; 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