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

Substitution

Processing...

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 = "^(drv:\\d+)(?:[\\s\\S]+?(?:Name|Serial|Port):.*$){3}\\n\\h*(\\[[^\\]]+?])"; final String string = "HDClone 6 Enterprise Edition\n" + "Serial: 1111111111\n\n" + "Miray Software AG\n" + "Gaissacher Str. 18\n" + "81371 Munich\n" + "Germany\n\n" + "Detecting drives.\n" + "drv:0 Name: WDC WD40EZRZ-00WN9B0 (4,000,754 MB)\n" + " Serial: WD-WCC4E0ESU7YK\n" + " Port: 0/1/1/0\n" + " [ -, M:, X: ]\n" + "To specify this drive, use the following parameters:\n" + "-srcdrv:/-dstdrv:0\n" + "-srcdrvn:/-dstdrvn:\"WDC WD40EZRZ-00WN9B0\"\n" + "-srcdrvn:/-dstdrvn:\"WDC WD40EZRZ-00WN9B0WD-WCC4E0ESU7YK\"\n" + "-srvdrvp:/-dstdrvp:0/1/1/0\n\n" + "drv:1 Name: ST2000DM001-1CH164 (2,000,399 MB)\n" + " Serial: S1E1GA0V\n" + " Port: 0/1/1/1\n" + " [ S:, T: ]\n" + "To specify this drive, use the following parameters:\n" + "-srcdrv:/-dstdrv:1\n" + "-srcdrvn:/-dstdrvn:ST2000DM001-1CH164\n" + "-srcdrvn:/-dstdrvn:ST2000DM001-1CH164S1E1GA0V\n" + "-srvdrvp:/-dstdrvp:0/1/1/1\n\n" + "drv:2 Name: ST2000DM001-1CH164 (2,000,399 MB)\n" + " Serial: S1E1GC0Z\n" + " Port: 0/0/0/1\n" + " [ B:, P: ]\n" + "To specify this drive, use the following parameters:\n" + "-srcdrv:/-dstdrv:2\n" + "-srcdrvn:/-dstdrvn:ST2000DM001-1CH164\n" + "-srcdrvn:/-dstdrvn:ST2000DM001-1CH164S1E1GC0Z\n" + "-srvdrvp:/-dstdrvp:0/0/0/1\n\n" + "drv:3 Name: WDC WD10EADS-11M2B2 (1,000,205 MB)\n" + " Serial: WD-WCAV5D430071\n" + " Port: 0/0/2/0\n" + " [ -, V: ]\n" + "To specify this drive, use the following parameters:\n" + "-srcdrv:/-dstdrv:3\n" + "-srcdrvn:/-dstdrvn:\"WDC WD10EADS-11M2B2\"\n" + "-srcdrvn:/-dstdrvn:\"WDC WD10EADS-11M2B2WD-WCAV5D430071\"\n" + "-srvdrvp:/-dstdrvp:0/0/2/0\n\n" + "drv:4 Name: KINGSTON SMS200S360G (60,023 MB)\n" + " Serial: 50026B72440A6EE7\n" + " Port: 0/1/3/0\n" + " [ C: ]\n" + "To specify this drive, use the following parameters:\n" + "-srcdrv:/-dstdrv:4\n" + "-srcdrvn:/-dstdrvn:\"KINGSTON SMS200S360G\"\n" + "-srcdrvn:/-dstdrvn:\"KINGSTON SMS200S360G50026B72440A6EE7\"\n" + "-srvdrvp:/-dstdrvp:0/1/3/0"; final String subst = ""; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); // The substituted value will be contained in the result variable final String result = matcher.replaceAll(subst); System.out.println("Substitution result: " + result); } }

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