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

r"
"
gmi

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 = "\\b(?<!\\.)[!#$%&'*+\\-/=?^_`\\{|\\}~\\w][!#$%&'*+\\-/=?^_`\\{|\\}~\\.\\w]{0,}[!#$%&'*+\\-/=?^_`\\{|\\}~\\w][@]\\w+(?:[-.]\\w+)*"; final String string = "Check this one too for my friend: a&d@somedomain.com\n" + "This looks weired but it is valid email a*d@somedomain.com\n" + "Same here really odd one - a/d@somedomain.com\n" + "What can you say for this one huh ? tim@yahoo.abc.com\n" + "Non-Matches:\n" + "This is invalid _ .abc@somedomain.com\n" + "Not at all valid abc.@somedomain.com\n" + "angle brackates are not allowed too a>b@somedoma\n\n" + "visa, last 4 digits 3208; my dob is 12/31\n" + "this afternoon the 800 number. I live\n" + "number (ending in 6436), however it has a cvv to capture.\n" + "that a payment on 5183 is due 6/21. I am prepared to get my cvv\n" + "was sent ending in 4859 does not work\n" + "check it, my ID is 411978813 not present in my data.\n" + "my number is _84 24 028458888 they gave a reference\n" + "Vregistration number 280757578 and having another data is also available.\n" + "confirmation code 100453052 and ave yet to get those details in to my account\n" + "my number again : +55(11)995149340 thanks and regards\n" + "has an item number 253778620 please can you project this details to client.\n" + "it card ending in 7656 never receive the pin for my cc card details.\n" + "my card pin not received but I arrive october 16 2018 thru UPS but until\n" + "My old passwOrD was kufd87jhj_)kj\n" + "Pin: 901608 7383 psdwd is p6%ss_09gt^4v}\n" + "Mobile unlock key for user_1 is: 7305q-efd0t-0i2i7 and\n" + "for user_2 is fgth8d-c7760-wwrb3 and the password for user_1 is gth8d_kj212\n" + "The CEO's UUID is provided here - 7FC747F5-FB0D-4065-82B1-3F38D2988ECE and\n" + "the COO's is also provided: 31EB3A28-896A-40C2-B0BE-0C21EA3F4FBB4\n" + "My ipv4 address is 392.168.0.42; but 192.168.0.420 is not an address.\n" + "The hacker's ip is 168.212.226.204 and he has no idea that I who's ip is not \n" + "Here are some ipv6 hosts which I'll be using to confuse the hacker: fe80::1 or 2342:32fd::2d32\n" + "fe80:33333::1ff:fe23:4567:890a this is invalid ip and my pswd: h_08$#fRdc54@\n" + "ohn, please get that article on www.linkedin.com to me by 5:00PM or 7th of December 1976\n" + "If you have any other plans on February 16th then let me know or on 15/02/2009 and \n" + "My birthday is on 12th of oct and my wife's date of birth is december 39, 1991\n" + "You can reach me at (519)-236-2723x341 or get in touch with my associate at harold.smith@gmail.com\n" + "Here is your new TsyS_passwrd: 1LK2XP0S and the system pswd is nwfun&b_08G\n" + "Here is your new tsYs-paSswOrd - NsoCxbo4 and the passwrd is pass_09Hg54v}\n" + "my person no. is 67542090 and nbk is zk87ghY but my friend's nbk starts from nb which is nbh768i\n" + "please go to this link and upload your documents - http://www.bofa.com/\n" + "follow this link: https://www.ml.com/ and make a payment of $35.00\n" + "click on this link and get hacked banofamerica.com/page1/hacked/\n" + "this is official website www.bankofamerica.com\n" + "your loan file number is pfm657890345120 and loan balance is $34,67.89\n" + "loan reference number is provided as 657890236758409 and monthly installment is $ 12.50K\n" + "you have received the loan reimbursement of 2.9 million dollars\n" + "this month loan amount is 54,98.45K and transaction no is a72h6j98\n" + "this client transaction num: A7287509j is invalid but unlock key is 57zod-8ftf9-p0fu3 is valid\n" + "The party id - 12345678900 is actually a customer whose loan number is 12345678\n" + "customer: 09876543211 and loan num 123456789\n" + "The credit scores are: fico 123 and Port Number 64438\n" + "credit score is 987 and unlock key: cmydh-gpgke-3xehb\n" + "234 678 and unlock key - dzdb9950bsi3su4\n" + "984 652 836 and access the drive \\\\Dfs.uk.ml.com\\london\\gtsshared\\ProjectDelivery\\TI\n" + "License key: B40ZH2PLKRHUN7RD8P7PQ6MHSMFC5HPUG2YJW-142-101-064-0E\n" + "License key: EDJWMHCS3SGAPPCCBFLARYZMX7ZMWRFLKM-142-100-934-AD\n" + "this is some kind of key I guess 490853-104214-320254-230868-710347-170533-492679-288992\n" + "Even this is some kind of key 090640-265034-253704-024937-145321-484748-151778-459074\n" + "this mail is regarding employee termination of user nbkh7h0 \n" + "ssh2: RSA SHA256:hKeAu/WKftYpqXHW4ReTrv3wXYbkdkdNgnEyGHkMCsSPU\n" + "URGENT TERMINATION: User - zk8hy5f \n" + "RSA key fingerprint is SHA256:N5JRToYZAAlaroppYu7R7aB06ihyqvCVrYfLxLC\n" + "we have received a terminatION request for user zk4gh8y\n" + "access key: hba1x oc6a4 fx7uq and drive link: \\\\nrch3000-nas03.bankofamerica.com\\nrch0300_user033$\\8tzkj6h\\homespace\n" + "Security code: 690037 and Port: 6443\n" + "unlock key tnaxx-9hbx7-pdg33 Port 6443\n" + "\"Traceback (most recent call last):\n" + " File \"\"/path/to/example.py\"\", line 4, in <module>\n" + " greet('Chad')\n" + " File \"\"/path/to/example.py\"\", line 2, in greet\n" + " print('Hello, ' + someon)\n" + "NameError: name 'someon' is not defined\"\n" + "pbrun7.5.0-12[404]: Request rejected by pbmasterd on server1234.abcd.yyyy.com. \n" + "Error: \"sh: pbrun: command not found\"\n" + " http://ah-1004452-001.corp.bankofamerica.com:8080/\n" + "production server lmumm01spdbd1.corp.bankofamerica.com:49125 is depricated\n" + "tcp link is given as - tcp://ah-1005300-001.sdi.corp.bankofamerica.com:8343\n"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE); 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