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+\\}|:(?= )|;)"; final String string = ".fixed-feedback-block {\n" + " position: fixed;\n" + " right: 0;\n" + " top: calc(50% - 33px);\n" + " cursor: pointer;\n" + " .inner {\n" + " text-indent: 10px;\n" + " }\n" + " svg {\n" + " width: 50px;\n" + " position: absolute;\n" + " top: 15px;\n" + " left: 0;\n" + " z-index: 85;\n" + " height: 20px;\n" + " }\n" + " .call-me-button {\n" + " width: 240px;\n" + " height: 50px;\n" + " display: block;\n" + " background: #f35556;\n" + " transform: translate3d(190px, 0, 0);\n" + " transition: transform 0.3s ease-out;\n" + " border: none;\n" + " box-shadow: none;\n" + " border-radius: 0;\n" + " &:hover {\n" + " transform: translate3d(0px, 0, 0)\n" + " }\n" + " }\n" + " .write-to-us-button {\n" + " width: 215px;\n" + " height: 50px;\n" + " background: #00a5b8;\n" + " float: right;\n" + " transform: translate3d(165px, 0, 0);\n" + " transition: transform 0.3s ease-out;\n" + " border: none;\n" + " box-shadow: none;\n" + " border-radius: 0;\n" + " &:hover {\n" + " transform: translate3d(0px, 0, 0)\n" + " }\n" + " }\n" + "}"; 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