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 = "^((CAPR?I?\\s?SUN\\b)|(CAPRI\\b)|(C\\W?S\\b)|(JUICES?\\b)|(STRAWBERRY\\b))"; final String string = "C/S ARIETY PACK 40CT CS C/S\n" + "CAPRI SN SPR V FRTPNCH 10PK\n" + "CAPRI SN SPR V JCE APPLE 10PK\n" + "CAPRI SN SPR V JCE BERRY 10PK\n" + "CAPRI STRAWNANA MINIONS CAPRI\n" + "CAPRI SUN100% JUICE APPLE SPL\n" + "CAPRI SUN 100% JUICE BERRY BRE\n" + "CAPRI SUN 100% JUICE FRUIT DIV\n" + "CAPRI SUN 100% JUICE GRAPE TID\n" + "CAPRI SUN 40CT 100% JUICE VAR\n" + "CAPRI SUN 40CT ROARING WATERS\n" + "CAPRI SUN 40CT VARIETY PACK\n" + "CAPRI SUN COOL 40 CT\n" + "CAPRI SUN FRT PNCH SPOUTED PCH\n" + "CAPRI SUN FRT PUNCH 30CT\n" + "CAPRI SUN FRUIT PUNCH\n" + "CAPRI SUN FRUIT/VEGGIE APPLE SWEET POTATO SMASH 10CT\n" + "CAPRI SUN FRUIT/VEGGIE PUNCH CARROT CRAZE 10PK\n" + "CAPRI SUN GRAPE\n" + "CAPRI SUN KWI SPOUTED PCH\n" + "CAPRI SUN LEMONADE\n" + "CAPRI SUN MOUNTAIN COOLER\n" + "CAPRI SUN ORANGE\n" + "CAPRI SUN ORGANIC APPLE 10PK\n" + "CAPRI SUN ORGANIC FRUIT PUNCH 10PK\n" + "CAPRI SUN ORGANIC GRAPE 10PK\n" + "CAPRI SUN ORGANIC TROPICAL PUNCH 10PK\n" + "CAPRI SUN PACIFIC COOLER\n" + "CAPRI SUN PACIFIC COOLER 30/6 OZ\n" + "CAPRI SUN RED BERRY\n" + "CAPRI SUN ROARIN WATER BERRY\n" + "CAPRI SUN ROARIN WATER GRAPE\n" + "CAPRI SUN ROARIN WATER STRAWBE\n" + "CAPRI SUN ROARIN WATER TROPICA\n" + "CAPRI SUN ROARIN WATER WILD CH\n" + "CAPRI SUN ROARING WATERS FRT P\n" + "CAPRI SUN SPLASH COOLER\n" + "CAPRI SUN STRAWBERRY\n" + "CAPRI SUN STRAWBERRY KIWI\n" + "CAPRI SUN STRW KIWI 30CT\n" + "CAPRI SUN SURF COOLER\n" + "CAPRI SUN TROPICAL PUNCH\n" + "CAPRI SUN WILD CHERRY\n" + "CAPRI SUN WLD CHRRY 30CT\n" + "CAPRISUN 100% JC\n" + "CAPRISUN ROARING WATERS TROPICAL FRUIT\n" + "CAPSUN COASTAL COOLER 10 pk \n" + "CAPSUN FRUIT PUNCH DRINK 10PK 10 ct \n" + "CAPSUN PACIFIC COOLER 10PK 10 ct \n" + "CS FRUIT PUNCH\n" + "JUICE FRT VEG BERRY/CARRT BLST\n" + "JUICES APPLE FRUIT REFRESHER\n" + "JUICES BERRY FRUIT REFRESHER\n" + "STRAWBERRY LEMONADE ORGANIC\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