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
No Match

/
/
m

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 = "^ *analyticsConfig\\.analyticsClass = WLAnalyticsWrapper\\.self"; final String string = "@objc (WLAppDelegate)\n" + "open class WLAppDelegate: LUUIBaseAppDelegate {\n\n" + " fileprivate var overrideTabBarControllerDelegate: LUUITabBarControllerDelegate?\n" + " open override var tabBarControllerDelegate: UITabBarControllerDelegate? {\n" + " if overrideTabBarControllerDelegate == nil {\n" + " overrideTabBarControllerDelegate = WLTabBarControllerDelegate()\n" + " }\n" + " return overrideTabBarControllerDelegate\n" + " }\n\n" + " @objc open override func applyAppearance() {\n" + " super.applyAppearance()\n" + " WLAppearance.apply()\n" + " }\n\n" + " // swiftlint:disable:next function_body_length\n" + " @objc open override func configureApplicationKeys() {\n" + " let appConfig: LUUIApplicationConfiguration = LUUIApplicationConfiguration.shared()\n\n" + " appConfig.crashlyticsAPIKey = WLCrashlyticsAPIKey\n" + " appConfig.googleAnalyticsTrackingID = WLGoogleAnalyticsTrackingID\n" + " appConfig.inviteFriendsShowsQRCode = true\n" + " appConfig.referAFriendCampaignID = NSNumber(value: WLReferAFriendCampaignID)\n" + " appConfig.usesSideNavigation = false\n" + " appConfig.enablePaymentPreferenceSelection = true\n" + " appConfig.sendGiftCardFromSettings = true\n" + " appConfig.claimBankingEnabled = true\n" + " appConfig.showEnableLocationAlert = true\n" + " appConfig.enableFacebookLogin = true\n" + " appConfig.myRewardsEnabled = true\n" + " appConfig.showOptionalInfoDuringRegistration = true\n" + " appConfig.analyticsConfiguration = analyticsConfiguration()\n" + " appConfig.cardReaderConfiguration = cardReaderConfiguration()\n" + " appConfig.appLocationsScreen = .mapLocations\n" + " appConfig.allowsOrderAhead = true\n" + " appConfig.enableOrderAheadLandingScreen = true\n" + " appConfig.allowsOrderAheadDelivery = false\n" + " appConfig.orderAheadMenuLayoutStyle = .list\n" + " appConfig.modularRewardsEnabled = true\n" + " appConfig.enableOrderAheadTipCell = false\n\n" + " appConfig.levelupAPIKey = WLLevelUpAPIKey\n" + " appConfig.environmentConfigProd.levelupAppID = WLLevelUpAPIKey as NSString\n" + " appConfig.environmentConfigStaging.levelupAPIKey = WLLevelUpAPIKeyStaging as NSString\n\n" + " appConfig.levelupAppID = WLLevelUpAppID\n" + " appConfig.environmentConfigProd.levelupAppID = WLLevelUpAppID as NSString\n" + " appConfig.environmentConfigStaging.levelupAppID = WLLevelUpAppIDStaging as NSString\n\n" + " if WLLegacyLoyaltyCampaignID > 0 {\n" + " appConfig.loyaltyMigrationCampaignID = NSNumber(value: WLLegacyLoyaltyCampaignID)\n" + " appConfig.environmentConfigProd.loyaltyMigrationCampaignID = appConfig.loyaltyMigrationCampaignID!\n" + " appConfig.environmentConfigStaging.loyaltyMigrationCampaignID = NSNumber(value: WLLegacyLoyaltyCampaignIDStaging)\n" + " }\n\n" + " if WLReferAFriendCampaignID > 0 {\n" + " appConfig.referAFriendCampaignID = NSNumber(value: WLReferAFriendCampaignID)\n" + " appConfig.environmentConfigProd.referAFriendCampaignID = appConfig.referAFriendCampaignID!\n" + " appConfig.environmentConfigStaging.referAFriendCampaignID = NSNumber(value: WLReferAFriendCampaignIDStaging)\n" + " }\n\n" + " if let rewardsLoyaltyCampaignID: NSNumber = applicationConfig().rewardsLoyaltyCampaignID {\n" + " appConfig.rewardsLoyaltyCampaignID = rewardsLoyaltyCampaignID\n" + " appConfig.rewardsLoyaltyCampaignType = .spendBased\n" + " } else if WLRewardsLoyaltyCampaignID > 0 {\n" + " appConfig.rewardsLoyaltyCampaignID = NSNumber(value: WLRewardsLoyaltyCampaignID)\n" + " appConfig.environmentConfigProd.rewardsLoyaltyCampaignID = appConfig.rewardsLoyaltyCampaignID!\n" + " appConfig.environmentConfigStaging.rewardsLoyaltyCampaignID = NSNumber(value: WLRewardsLoyaltyCampaignIDStaging)\n" + " appConfig.rewardsLoyaltyCampaignType = .spendBased\n" + " }\n\n" + " if WLRewardsStatusCampaignID > 0 {\n" + " appConfig.rewardsStatusCampaignID = NSNumber(value: WLRewardsStatusCampaignID)\n" + " appConfig.environmentConfigProd.rewardsStatusCampaignID = appConfig.rewardsStatusCampaignID!\n" + " appConfig.environmentConfigStaging.rewardsStatusCampaignID = NSNumber(value: WLRewardsStatusCampaignIDStaging)\n" + " appConfig.rewardsStatusCampaignType = .spendBased\n" + " }\n\n" + " appConfig.analyticsConfiguration = analyticsConfiguration()\n" + " appConfig.cardReaderConfiguration = cardReaderConfiguration()\n" + " appConfig.crashReportingConfiguration = crashReportingConfiguration()\n" + " appConfig.viewControllerConfiguration = viewControllerConfiguration()\n" + " appConfig.viewConfiguration = viewConfiguration()\n" + " appConfig.cellConfiguration = cellConfiguration()\n" + " }\n\n" + " @objc open func analyticsConfiguration() -> LUUIAnalyticsConfiguration {\n" + " let analyticsConfig: LUUIAnalyticsConfiguration = LUUIAnalyticsConfiguration()\n" + " analyticsConfig.analyticsClass = WLAnalyticsWrapper.self\n" + " return analyticsConfig\n" + " }\n\n" + " @objc open func cardReaderConfiguration() -> LUUICardReaderConfiguration {\n" + " let cardReaderConfig: LUUICardReaderConfiguration = LUUICardReaderConfiguration()\n" + " cardReaderConfig.cardReaderViewControllerClass = WLCardReaderViewController.self\n" + " return cardReaderConfig\n" + " }\n\n" + " @objc open func crashReportingConfiguration() -> LUUICrashReportingConfiguration {\n" + " let crashReportingConfig: LUUICrashReportingConfiguration = LUUICrashReportingConfiguration()\n" + " crashReportingConfig.crashReportingWrapperClass = WLCrashlyticsWrapper.self\n" + " return crashReportingConfig\n" + " }\n\n" + " @objc open override func tabBarViewControllers() -> [Any]? {\n" + " return UITabBarController.loggedInTabBarController()\n" + " }\n\n" + " @objc open func viewConfiguration() -> LUUIViewConfiguration {\n" + " let config = LUUIViewConfiguration()\n\n" + " config.imageRewardProgressionViewClass = WLImageRewardProgressionView.self\n\n" + " return config\n" + " }\n\n" + " @objc open func viewControllerConfiguration() -> LUUIViewControllerConfiguration {\n" + " let config = LUUIViewControllerConfiguration()\n\n" + " config.confirmGiftCardOrderViewControllerClass = WLConfirmGiftCardOrderViewController.self\n" + " config.forgotPasswordViewControllerClass = WLForgotPasswordViewController.self\n" + " config.getStartedViewControllerClass = WLGetStartedViewController.self\n" + " config.interstitialViewControllerClass = WLInterstitialViewController.self\n" + " config.inviteFriendsViewControllerClass = WLInviteFriendsViewController.self\n" + " config.logInViewControllerClass = WLLogInViewController.self\n" + " config.mapLocationsLocationDetailViewControllerClass = WLMapLocationsLocationDetailViewController.self\n" + " config.mapLocationsSearchViewControllerClass = WLMapLocationsSearchViewController.self\n" + " config.mapLocationsViewControllerClass = WLMapLocationsViewController.self\n" + " config.orderAheadLandingViewControllerClass = WLOrderAheadLandingViewController.self\n" + " config.orderGiftCardViewControllerClass = WLOrderGiftCardViewController.self\n" + " config.paymentMethodDetailViewControllerClass = WLPaymentMethodDetailViewController.self\n" + " config.payViewControllerClass = WLPayViewController.self\n" + " config.scanSuccessViewControllerClass = WLScanSuccessViewController.self\n" + " config.selectPaymentPreferenceViewControllerClass = WLSelectPaymentPreferenceViewController.self\n" + " config.settingsViewControllerClass = WLSettingsViewController.self\n" + " config.signUpViewControllerClass = WLSignUpViewController.self\n" + " config.signUpOrLogInViewControllerClass = WLSignUpOrLogInViewController.self\n" + " config.transactionDetailViewControllerClass = WLTransactionDetailViewController.self\n" + " config.transactionHistoryViewControllerClass = WLTransactionHistoryViewController.self\n" + " config.rewardsStatusLevelsViewControllerClass = WLRewardsStatusLevelsViewController.self\n" + " config.permissionPrimerViewControllerClass = WLPermissionPrimerViewController.self\n" + " config.selectPaymentMethodViewControllerClass = WLSelectPaymentMethodViewController.self\n" + " config.availableRewardsDrawerViewControllerClass = WLAvailableRewardsDrawerViewController.self\n" + " config.modularRewardsViewControllerClass = WLModularRewardsViewController.self\n\n" + " return config\n" + " }\n\n" + " @objc open func cellConfiguration() -> LUUICellConfiguration {\n" + " let config = LUUICellConfiguration()\n\n" + " config.captionedImageHeaderViewCellClass = WLCaptionedImageHeaderViewCell.self\n" + " config.locationCellClass = WLLocationCell.self\n" + " config.mapLocationsButtonsCellClass = WLMapLocationsButtonsCell.self\n" + " config.mapLocationsLocationCellClass = WLMapLocationsLocationCell.self\n" + " config.transactionEarnedCreditCellClass = WLTransactionEarnedCreditCell.self\n" + " config.transactionHistoryCellClass = WLTransactionHistoryCell.self\n" + " config.statusLevelGoalCellClass = WLStatusLevelGoalCell.self\n" + " config.availableRewardIconTableViewCellClass = WLAvailableRewardIconTableViewCell.self\n" + " config.orderAheadSpecialInstructionsCellClass = WLOrderAheadSpecialInstructionsCell.self\n" + " config.orderAheadCategoryMenuListTableViewCellClass = WLOrderAheadCategoryMenuListTableViewCell.self\n\n" + " return config\n" + " }\n\n" + " @objc open override func settingsSectionsData() -> LUUIStaticTableViewData {\n" + " let data = LUUIStaticTableViewSectionsData()\n\n" + " data.add(WLStaticTableViewSectionFactory.customSocialSection())\n" + " data.add(WLStaticTableViewSectionFactory.customAccountSection())\n" + " data.add(WLStaticTableViewSectionFactory.customHelpSection())\n\n" + " return data\n" + " }\n\n" + "}\n"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); if (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