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

/
/
gm

Test String

Code Generator

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "^(?<Data_0>[ ]{13,16})(?<Data_1>[0-9]{6,9})\\s{5,6}(?<Data_2>[0-9a-zA-Z\\/.\\-_,\\n%: ]{6,720})(?: [0-9]{8} )"; final String string = " 6001908/ SAR - 125 KG 1 PC 96.00 12,000.00 \n" + " 32021000 BALSYN\n\n\n\n\n" + " 73101090 INV. REF TAX INVOICE INV DT. QTY BILL RATE\n" + " ACTUAL RATE RATE DIFF\n" + " BASIC AMT DIFF C.GST 9% UT GST 9% TOTAL DIFF.\n" + " AMOUNT\n" + " 1710125231 DH191012604017 29.10.2019 200 1,350.00\n" + " 1,290.00 60.00 12\n" + " ,000.00 1,080.00 1,080.00 14,160.00\n" + " 1710125233 DH191012604018 29.10.2019 203 1,350.00\n" + " 1,290.00 60.00 12\n" + " ,180.00 1,096.20 1,096.20 14,372.40\n" + " TOTAL 403 24,180.00 2,176.20 2,176.20 28,532.40\n\n\n\n" + " 73101090 200/210 LITRE NOMINAL CAPACITY NEW EMPTY\n" + " DRUMS MADE\n" + " FROM STEEL SHEET OF 1.25 MM NOMINAL\n" + " THICKNESS\n" + " COMPLETE WITH 50MM AND 20MM CLOSURE,\n" + " INTERNALLY\n" + " EPOXY COATED AS PER YOUR SPECIFICATION\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