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

/
/
gmsi

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 = "(\\w*\\(Hex\\): w*)(.*?)(?= |$)"; final String string = " Vserver Name: vs1\n" + " LUN Path: /vol/vol1/lun1\n" + " Volume Name: vol1\n" + " Qtree Name: \"\"\n" + " LUN Name: lun1\n" + " LUN Size: 10MB\n" + " OS Type: linux\n" + " Space Reservation: disabled\n" + " Serial Number: wCVt1]IlvQWv\n" + " Serial Number (Hex): 77435674315d496c76515776\n" + " Comment: new comment\n" + "Space Reservations Honored: false\n" + " Space Allocation: disabled\n" + " State: offline\n" + " LUN UUID: 76d2eba4-dd3f-494c-ad63-1995c1574753\n" + " Mapped: mapped\n" + " Block Size: 512\n" + " Device Legacy ID: -\n" + " Device Binary ID: -\n" + " Device Text ID: -\n" + " Read Only: false\n" + " Fenced Due to Restore: false\n" + " Used Size: 5MB\n" + " Maximum Resize Size: 64.00GB\n" + " Creation Time: 9/14/2016 13:55:09\n" + " Class: regular\n" + " Node Hosting the LUN: node1\n" + " QoS Policy Group: -\n" + " Caching Policy Name: -\n" + " Clone: false\n" + " Clone Autodelete Enabled: false\n" + " Inconsistent Import: false\n" + " Application: -"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.DOTALL | Pattern.CASE_INSENSITIVE); 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