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 = ".*\\((.|\\n)+\\)\\s*\\{"; final String string = "# @summary Manages the puppeteer monitor service.\n" + "# \n" + "# @param logon_domain\n" + "# The service will logon using this domain. Specify '.' for a local account.\n" + "#\n" + "# @param logon_name\n" + "# The service will logon using this user name.\n" + "#\n" + "# @param logon_password\n" + "# The service will logon using this password.\n" + "#\n" + "# @param ensure\n" + "# Whether or not install the puppeteermon service.\n" + "#\n" + "# @param source\n" + "# Where to obtain the puppeteermon service executable from.\n" + "#\n" + "# @param state\n" + "# Ensure the puppeteermon service is in the given `state`.\n" + "#\n" + "# @param startup\n" + "# How to start the puppeteermon service.\n" + "#\n" + "# @param version\n" + "# The version of the puppeteermon service that should be installed.\n" + "#\n" + "class profile::ct::puppeteermon(\n" + " String $logon_domain = \"${hiera('builder_domain', '.')}\",\n" + " String $logon_name = \"${hiera('builder_user', 'SYSTEM')}\",\n" + " String $logon_password = \"${hiera('builder_passwd', '')}\",\n" + " String $cooldown = '10m',\n" + " String $min_exec_time = '1m15s',\n" + " Enum[absent, present] $ensure = present,\n" + " String $source = 'https://repo.ct.activision.com/repository/puppet/puppeteermon/<%= ::osfamily %>/puppeteermon-<%= version %>',\n" + " Enum['running', 'stopped'] $state = 'running',\n\n" + " Enum['automatic', 'manual', 'disabled']\n" + " $startup = 'automatic',\n\n" + " String $version = '2.0.11',\n" + ") {\n" + " include profile::ct::puppeteer\n\n" + " if $::osfamily == 'windows' {\n" + " # Non-configurable class parameters\n" + " $basedir = 'C:/ProgramData/puppeteermon'\n" + " $os_source = regsubst($source, '<%= ::osfamily %>', 'windows', 'G')\n" + " $puppeteer_os_source = regsubst($profile::ct::puppeteer::source, '<%= ::osfamily %>', 'windows', 'G')\n" + " $puppeteer_fetch_source = regsubst($puppeteer_os_source, '<%= version %>', \"${profile::ct::puppeteer::version}.exe\", 'G')\n" + " $puppeteer_recovery_source = regsubst($puppeteer_os_source, '<%= version %>', 'recovery.exe', 'G')\n\n" + " profile::ct::puppeteer::config { \"${profile::ct::puppeteer::basedir}/puppeteer.conf\":\n" + " ensure => $ensure,\n" + " compass_master_url => $profile::ct::puppeteer::compass_master_url,\n" + " runinterval => $profile::ct::puppeteer::runinterval,\n" + " splay => $profile::ct::puppeteer::splay,\n" + " version => $profile::ct::puppeteer::version,\n" + " }\n" + " -> profile::ct::puppeteermon::config { \"${basedir}/puppeteermon.conf\":\n" + " ensure => $ensure,\n" + " cooldown => $cooldown,\n" + " fetch_url => $puppeteer_fetch_source,\n" + " download_dir => \"${profile::ct::puppeteer::basedir}/fetch\",\n" + " command => \"${profile::ct::puppeteer::basedir}/running/puppeteer.exe\",\n" + " }\n" + " profile::ct::puppeteer::config_new { \"${profile::ct::puppeteer::basedir}/puppeteer.yaml\":\n" + " ensure => $ensure,\n" + " compass_master_url => $profile::ct::puppeteer::compass_master_url,\n" + " compass_polling_interval => $profile::ct::puppeteer::compass_polling_interval,\n" + " runinterval => $profile::ct::puppeteer::runinterval,\n" + " last_run_summary => $profile::ct::puppeteer::last_run_summary,\n" + " splay => $profile::ct::puppeteer::splay,\n" + " version => $profile::ct::puppeteer::version,\n" + " agent_config_platform => $profile::ct::puppeteer::agent_config_platform,\n" + " }\n" + " -> profile::ct::puppeteermon::config_new { \"${basedir}/puppeteermon.yaml\":\n" + " ensure => $ensure,\n" + " cooldown => $cooldown,\n" + " fetch_url => $puppeteer_fetch_source,\n" + " recovery_url => $puppeteer_recovery_source,\n" + " download_dir => \"${profile::ct::puppeteer::basedir}/stage\",\n" + " command => \"${profile::ct::puppeteer::basedir}/running/puppeteer.exe\",\n" + " min_exec_time => $min_exec_time\n" + " }\n" + " -> wservice { 'puppeteermon':\n" + " ensure => $ensure,\n" + " state => $state,\n" + " startup => $startup,\n" + " source => regsubst($os_source, '<%= version %>', \"${version}.tar.gz\", 'G'),\n" + " version => $version,\n" + " path => \"${basedir}/puppeteermon.exe\",\n" + " account => \"${logon_domain}\\\\${logon_name}\",\n" + " password => $logon_password,\n" + " registercmd => ['<%= path %>', 'install'],\n" + " unregistercmd => ['<%= path %>', 'uninstall'],\n" + " }\n\n" + " if $ensure == present {\n" + " $enable = $startup ? { 'automatic' => 'true', 'manual' => 'manual', default => 'false' }\n" + " service { 'puppeteermon':\n" + " ensure => $state,\n" + " enable => $enable,\n" + " require => Wservice['puppeteermon']\n" + " }\n" + " }\n" + " } elsif $::osfamily == 'Darwin' {\n" + " # Non-configurable class parameters\n" + " $basedir = '/opt/puppeteermon'\n" + " $os_source = regsubst($source, '<%= ::osfamily %>', 'darwin', 'G')\n" + " $puppeteer_os_source = regsubst($profile::ct::puppeteer::source, '<%= ::osfamily %>', 'darwin', 'G')\n" + " $puppeteer_fetch_source = regsubst($puppeteer_os_source, '<%= version %>', $profile::ct::puppeteer::version, 'G')\n" + " $puppeteer_recovery_source = regsubst($puppeteer_os_source, '<%= version %>', 'recovery', 'G')\n\n" + " profile::ct::puppeteer::config_new { \"${profile::ct::puppeteer::basedir}/puppeteer.yaml\":\n" + " ensure => $ensure,\n" + " compass_master_url => $profile::ct::puppeteer::compass_master_url,\n" + " compass_polling_interval => $profile::ct::puppeteer::compass_polling_interval,\n" + " runinterval => $profile::ct::puppeteer::runinterval,\n" + " last_run_summary => $profile::ct::puppeteer::last_run_summary,\n" + " splay => $profile::ct::puppeteer::splay,\n" + " version => $profile::ct::puppeteer::version,\n" + " agent_config_platform => $profile::ct::puppeteer::agent_config_platform,\n" + " }\n" + " -> profile::ct::puppeteermon::config_new { \"${basedir}/puppeteermon.yaml\":\n" + " ensure => $ensure,\n" + " cooldown => $cooldown,\n" + " fetch_url => $puppeteer_fetch_source,\n" + " recovery_url => $puppeteer_recovery_source,\n" + " download_dir => \"${profile::ct::puppeteer::basedir}/stage\",\n" + " command => \"${profile::ct::puppeteer::basedir}/running/puppeteer\",\n" + " min_exec_time => $min_exec_time\n" + " }\n" + " -> puppeteermon { '/opt/puppeteermon/puppeteermon':\n" + " ensure => $ensure,\n" + " version => $version,\n" + " source => regsubst($os_source, '<%= version %>', $version, 'G'),\n" + " }\n\n" + " if $ensure == present {\n" + " $enable = $startup ? {'automatic' => 'true', 'manual' => 'manual', default => 'false' }\n" + " service { 'puppeteermon':\n" + " ensure => $state,\n" + " enable => $enable,\n" + " provider => 'launchd',\n" + " require => Puppeteermon['/opt/puppeteermon/puppeteermon']\n" + " }\n" + " }\n" + " } else {\n" + " # Non-configurable class parameters\n" + " $basedir = '/opt/puppeteermon'\n" + " $os_source = regsubst($source, '<%= ::osfamily %>', 'linux', 'G')\n" + " $puppeteer_os_source = regsubst($profile::ct::puppeteer::source, '<%= ::osfamily %>', 'linux', 'G')\n" + " $puppeteer_fetch_source = regsubst($puppeteer_os_source, '<%= version %>', $profile::ct::puppeteer::version, 'G')\n" + " $puppeteer_recovery_source = regsubst($puppeteer_os_source, '<%= version %>', 'recovery', 'G')\n\n" + " profile::ct::puppeteer::config_new { \"${profile::ct::puppeteer::basedir}/puppeteer.yaml\":\n" + " ensure => $ensure,\n" + " compass_master_url => $profile::ct::puppeteer::compass_master_url,\n" + " compass_polling_interval => $profile::ct::puppeteer::compass_polling_interval,\n" + " runinterval => $profile::ct::puppeteer::runinterval,\n" + " last_run_summary => $profile::ct::puppeteer::last_run_summary,\n" + " splay => $profile::ct::puppeteer::splay,\n" + " version => $profile::ct::puppeteer::version,\n" + " agent_config_platform => $profile::ct::puppeteer::agent_config_platform,\n" + " }\n" + " -> profile::ct::puppeteermon::config_new { \"${basedir}/puppeteermon.yaml\":\n" + " ensure => $ensure,\n" + " cooldown => $cooldown,\n" + " fetch_url => $puppeteer_fetch_source,\n" + " recovery_url => $puppeteer_recovery_source,\n" + " download_dir => \"${profile::ct::puppeteer::basedir}/stage\",\n" + " command => \"${profile::ct::puppeteer::basedir}/running/puppeteer\",\n" + " min_exec_time => $min_exec_time\n" + " }\n" + " -> puppeteermon { '/opt/puppeteermon/puppeteermon':\n" + " ensure => $ensure,\n" + " version => $version,\n" + " source => regsubst($os_source, '<%= version %>', $version, 'G'),\n" + " }\n\n" + " if $ensure == present {\n" + " $enable = $startup ? {'automatic' => 'true', 'manual' => 'manual', default => 'false' }\n" + " service { 'puppeteermon':\n" + " ensure => $state,\n" + " enable => $enable,\n" + " provider => 'systemd',\n" + " require => Puppeteermon['/opt/puppeteermon/puppeteermon']\n" + " }\n" + " }\n" + " }\n" + "}\n"; 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