Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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"
"
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(Airport\\s+TNCB.*(?:\\n.*)*?)\\n----"; final String string = "----\n" + "Airport SPQU :S16:20:25.6431 W071:34:22.3800 8338ft\n" + "Country Name=\"Peru\"\n" + "State Name=\"\"\n" + "City Name=\"Arequipa\"\n" + "Airport Name=\"Rodriguez Ballon\"\n" + "in file: ORBX\\FTX_VECTOR\\FTX_VECTOR_AEC\\scenery\\AEC_SPQU.bgl\n" + "----\n" + "Airport SPRF :S14:15:59.9484 W070:27:59.9997 14419ft\n" + "Country Name=\"Peru\"\n" + "State Name=\"\"\n" + "City Name=\"San Rafael\"\n" + "Airport Name=\"San Rafael\"\n" + "in file: Scenery\\0304\\scenery\\APX29370.bgl\n" + "Start 12 : S14:15:40.9653 W070:28:38.3900 14419ft Hdg: 117.0T, Length 8760ft \n" + "Start 30 : S14:16:18.9314 W070:27:21.6092 14419ft Hdg: 297.0T, Length 8760ft \n" + "0120 Lat -14.261198 Long -70.477715 Alt 14419 Hdg 120 Len 8760 Wid 98\n" + "0300 Lat -14.272106 Long -70.455620 Alt 14419 Hdg 300 Len 8760 Wid 98\n" + "----\n" + "Airport TNCB :N12:08:25.5567 W068:16:34.3503 20ft\n" + "Country Name=\"Netherlands Antilles\"\n" + "State Name=\"\"\n" + "City Name=\"Bonaire I\"\n" + "Airport Name=\"Flamingo\"\n" + "in file: Scenery\\0303\\scenery\\APX29270.bgl\n" + "Start 10 : N12:08:23.2891 W068:17:16.0525 20ft Hdg: 92.0T, Length 9448ft \n" + "Start 28 : N12:08:20.1144 W068:15:43.9767 20ft Hdg: 272.0T, Length 9448ft \n" + "0100 Lat 12.139818 Long -68.288246 Alt 20 Hdg 100 Len 9448 Wid 148\n" + "0280 Lat 12.138905 Long -68.261757 Alt 20 Hdg 280 Len 9448 Wid 148\n" + "----\n" + "Airport TNCC :N12:11:20.0649 W068:57:34.8897 29ft\n" + "Country Name=\"Netherlands Antilles\"\n" + "State Name=\"\"\n" + "City Name=\"Curacao I\"\n" + "Airport Name=\"Willemstad-Hato Intl.\"\n" + "in file: Scenery\\0303\\scenery\\APX29270.bgl\n" + "Start 11 : N12:11:30.5607 W068:58:24.9607 29ft Hdg: 102.1T, Length 11186ft \n" + "Start 29 : N12:11:08.2410 W068:56:38.2654 29ft Hdg: 282.1T, Length 11186ft \n" + "0110 Lat 12.191923 Long -68.974129 Alt 29 Hdg 111 Len 11186 Wid 197 ILS 111.90, Flags: GS DME BC\n" + "0290 Lat 12.185513 Long -68.943428 Alt 29 Hdg 291 Len 11186 Wid 197\n" + "----\n" + "Airport TNCE :N17:29:32.4738 W062:58:29.8992 129ft\n" + "Country Name=\"Netherlands Antilles\"\n" + "State Name=\"\"\n" + "City Name=\"St Eustatius I\"\n" + "Airport Name=\"F.D. Roosevelt\"\n" + "in file: ORBX\\FTX_OLC\\FTX_VECTOR_FixedAPT\\scenery\\APT_TNCE.BGL\n" + "Start 6 : N17:29:35.1949 W062:59:02.6666 129ft Hdg: 50.3T, Length 4268ft \n" + "Start 24 : N17:30:00.9808 W062:58:30.1439 129ft Hdg: 230.2T, Length 4268ft \n" + "0060 Lat 17.492956 Long -62.984272 Alt 129 Hdg 63 Len 4268 Wid 98\n" + "0240 Lat 17.500425 Long -62.974819 Alt 129 Hdg 243 Len 4268 Wid 98\n" + "----\n" + "Airport TNCM :N18:02:27.0378 W063:06:34.2595 13ft\n" + "Country Name=\"Netherlands Antilles\"\n" + "State Name=\"\"\n" + "City Name=\"St Maarten I\"\n" + "Airport Name=\"Princess Juliana Intl\"\n" + "in file: Scenery\\0303\\scenery\\APX31250.bgl\n" + "Start 9 : N18:02:21.9843 W063:07:08.8215 13ft Hdg: 81.7T, Length 7150ft \n" + "Start 27 : N18:02:31.8322 W063:05:57.8823 13ft Hdg: 261.7T, Length 7150ft \n" + "0090 Lat 18.039392 Long -63.119469 Alt 13 Hdg 95 Len 7150 Wid 148\n" + "0270 Lat 18.042223 Long -63.099060 Alt 13 Hdg 275 Len 7150 Wid 148\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