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

/
/
g

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*\\d+\\/\\s*\\d+\\/(\\d+)"; final String string = "1X79 \"The X-Files\" (1.01) 9/10/93 1/17/94* 11/ 6/94*\n" + "1X01 \"Deep Throat\" (1.02) 9/17/93 12/24/93 6/24/94\n" + "1X02 \"Squeeze\" (1.03) 9/24/93 12/ 3/93 6/10/94 11/ 4/95*\n" + "1X03 \"Conduit\" (1.04) 10/ 1/93 12/14/93* 5/27/94\n" + "1X04 \"Jersey Devil\" (1.05) 10/ 8/93 12/31/93 7/22/94\n" + "1X05 \"Shadows\" (1.06) 10/22/93 3/ 4/94 5/26/95\n" + "1X06 \"Ghost in the Machine\" (1.07) 10/29/93 1/14/94\n" + "1X07 \"Ice\" (1.08) 11/ 5/93 1/17/94* 8/12/94 3/ 3/95\n" + "1X08 \"Space\" (1.09) 11/12/93 1/28/94 8/22/94*\n" + "1X09 \"Fallen Angel\" (1.10) 11/19/93 3/29/94* 11/13/94*\n" + "1X10 \"Eve\" (1.11) 12/10/93 3/11/94 8/26/94\n" + "1X11 \"Fire\" (1.12) 12/17/93 3/25/94 11/20/94*\n" + "1X12 \"Beyond the Sea\" (1.13) 1/ 7/94 4/ 8/94 12/22/95?\n" + "1X13 \"GenderBender\" (1.14) 1/21/94 5/20/94 7/21/95\n" + "1X14 \"Lazarus\" (1.15) 2/ 4/94 6/ 3/94 9/ 2/94\n" + "1X15 \"Young at Heart\" (1.16) 2/11/94 6/17/94 8/19/94\n" + "1X16 \"E.B.E.\" (1.17) 2/18/94 7/ 8/94 11/27/94*\n" + "1X17 \"Miracle Man\" (1.18) 3/18/94 7/ 1/94\n" + "1X18 \"Shapes\" (1.19) 4/ 1/94 10/28/94 8/ 4/95\n" + "1X19 \"Darkness Falls\" (1.20) 4/15/94 8/ 5/94 12/ 2/94\n" + "1X20 \"Tooms\" (1.21) 4/22/94 7/15/94 11/ 4/95*\n" + "1X21 \"Born Again\" (1.22) 4/29/94 8/22/94*\n" + "1X22 \"Roland\" (1.23) 5/ 6/94 7/29/94\n" + "1X23 \"The Erlenmeyer Flask\" (1.24) 5/13/94 9/ 9/94 9/ 1/95"; final Pattern pattern = Pattern.compile(regex); 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