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

/
/
g

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(?:S|PD|CH|ML|MD|VA|BVI|DB|KD|KE|PW|COL|AD|MET|VP|SI|VR|GAO|LK|RP|PAD|WAN|PWD|PMP|PBR|VN|PPC|NK|K|AH|I|JP|JU|UDZ|CHM|DDN|LN|CL|CLH|DKM|GK|WD|ED|DDK|DLN|DRN|DFD|GZB|DVV|GUR|GGN|ND|HHN|HAS|HYD|HKP|BWF|BBW|BKM|BSN|BL|BIN|ST|KN).*?\\d+\\b"; final String string = "pt paid rs-8488/- remaining amt\n" + "Credit Card Sales\n" + "ML 2926 VARSHA LAKHANI (AG)\n" + "IMRAN KHAN-PW-4798\n" + "Deepali Mishra Ah-5564 Tst\n" + "MANJU S-11226 T\n" + "SNEHA S-16191\n" + "SUMIT SETHI AH-5747 AG\n" + "SUJATA VORA AH-5361 AG\n" + "Deepali Mishra Ah-5564 Tst"; final Pattern pattern = Pattern.compile(regex); 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