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

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 = "(?<!\\S).(?!\\S)"; final String string = "a interior Casquillo Dint.50 100\n" + "brg aligning Self MM161Z end rod\n" + "del eje4 Junta hendidura\n" + "352 Junta tórica .20279\n" + "2z/C3GJN Rodamiento\n" + "pos. Ser. 440PM18002 Interruptor\n" + "Reductor SR12013 LF de velocidad\n" + "Sick M40Z025023TB1 fotoeléct. Barrera\n" + "PR Acoplamiento SA00177\n" + "cable 4p Conector micro 4m 889DF4AC5\n" + "Brazo actuador 399 largo:\n" + "Rodillo 114mm palanca morro largo:\n" + "Rodillo 330180000 libre\n" + "shaft bar 351819028 Nose\n" + "lineal excel Nook Rodamiento\n" + "Fotocélula Banner\n" + "cable EL03926 Prox. Sensor\n" + "EL99942 Ventilador\n" + "Cilindro reparado HY00115 hidráulico\n" + "SR10510 Reductor velocidad de\n" + "barra largo Rodillo de 98mm morro\n" + "Rueda horno nivel de centrado\n" + "SENSOR:VIBRATION,IP68,500G RANGE,MAX165°\n" + " | XSM-3034-30-PP iglidur X sleeve bearing\n" + "KIT:HI-TECH,OK143521,O-RING 5/2 WAY,VLV a |\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