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

/
/
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 = "(?'DrawingNumber'^P\\d{5}-\\d{2}-TP\\d{2}-\\d{3})-?(?'Hand'L|R)?-?(?'Dimensions'(-?\\d{2,})*)-?(?'Type'1|2)?$"; final String string = "P01867-13-TP09-001-4950-1775-1175-895-1125-835\n" + "FAIL01867-13-TP09-001-4950-1775-1175-895-1125-835\n\n" + "P01867-13-TP09-002-4950-1775-1045-895-1035\n" + "P01867-13-TP09-002---4950-1775-1045-895-1035\n\n" + "P01867-13-TP02-019-L-1137-275-852-102\n" + "P-13-TP02-019-L-1137-275-852-102\n\n" + "P01867-13-TP02-019-L-1137-275-852-102\n" + "P01867-13-TP02-019-L-1137-275-852-102-failure\n\n" + "P01867-13-TP02-019-R-1137-275-852-102\n" + "P01867-13-TP02-021-L-1137-1055-1372\n" + "P01867-13-TP02-021-L-1137-535-1027\n" + "P01867-13-TP02-021-L-1137-795-1184\n" + "P01867-13-TP02-021-R-1137-1055-1372\n" + "P01867-13-TP02-021-R-1137-535-1027\n" + "P01867-13-TP02-021-R-1137-795-1184\n" + "P01867-13-TP02-025-L-1137-1315-1581\n" + "P01867-13-TP02-025-R-1137-1315-1581\n" + "P01867-13-TP03-005\n" + "P01867-13-TP02-019-L-1137-275\n" + "P01867-13-TP02-019-R-1137-275\n" + "P01867-13-TP02-019-R-1137\n" + "P01867-13-TP02-019-L-1137\n\n" + "P01867-13-TP09-001-4950-1775-1175-895-1125-835-000-001-002-003-004-005-006-007\n\n" + "P01867-13-TP02-019-L-1137-275-852-102\n" + "P01867-13-TP02-019-R-1137-275-852-102\n" + "P01867-13-TP02-021-L-1137-1055-1372\n" + "P01867-13-TP02-021-L-1137-535-1027\n" + "P01867-13-TP02-021-L-1137-795-1184\n" + "P01867-13-TP02-021-R-1137-1055-1372\n" + "P01867-13-TP02-021-R-1137-535-1027\n" + "P01867-13-TP02-021-R-1137-795-1184\n" + "P01867-13-TP02-025-L-1137-1315-1581\n" + "P01867-13-TP02-025-R-1137-1315-1581\n" + "P01867-13-TP03-005\n" + "P01867-13-TP04-003-180-56\n" + "P01867-13-TP05-001-L-953\n" + "P01867-13-TP05-001-R-953\n" + "P01867-13-TP07-001-1073-1103\n" + "P01867-13-TP07-001-707-737\n" + "P01867-13-TP07-001-874-904\n" + "P01867-13-TP07-002-1289-1329\n" + "P01867-13-TP08-002-1302-1296\n" + "P01867-13-TP08-003-1317-1307-263\n" + "P01867-13-TP09-001-4950-1775-1175-895-1125-835\n" + "P01867-13-TP09-002-4950-1775-1045-895-1035\n" + "P01867-13-TP09-002-4950-1775-1110-895-1100\n" + "P01867-13-TP09-002-4950-1775-915-895-905\n" + "P01867-13-TP09-002-4950-1775-980-895-970\n" + "P01867-13-TP11-003\n" + "P01867-13-TP11-005-200\n" + "P01867-13-TP11-009-200\n" + "P01867-13-TP11-013\n" + "P01867-13-TP14-001-L-251-126\n" + "P01867-13-TP14-001-R-251-126\n" + "P01867-13-TP14-003-781\n" + "P01867-13-TP16-001-L-1772-157\n" + "P01867-13-TP16-001-R-1772-157\n" + "P01867-13-TP16-002-1397-157\n" + "P01867-13-TP17-001-L-728-921\n" + "P01867-13-TP17-001-R-728-921\n" + "P01867-13-TP17-011-748-91\n" + "P01867-13-TP17-016-748-91\n" + "P01867-13-TP20-010-L\n" + "P01867-13-TP20-010-R\n" + "P01867-13-TP20-014-L\n" + "P01867-13-TP20-014-R\n" + "P01867-13-TP02-047-1\n" + "P01867-13-TP02-047-2"; 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