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

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+-gradient\\(.*?\\)\\)|\\w+-gradient\\(.*?\\)"; final String string = "Only Match CSS gradients ignoring everything else.\n\n" + "EXAMPLES\n\n" + "2 and 3+ colors any type (4 matches): \\w+-gradient\\(.*?\\)\\)|\\w+-gradient\\(.*?\\)\n" + "3+ colors linear (1 match): linear-gradient\\(.*?\\)\\)\n" + "2 colors linear (4 matches): linear-gradient\\(.*?\\)\n" + "2 colors any type (4 matches): \\w+-gradient\\(.*?\\)\n\n" + "---\n\n" + "linear-gradient(148deg, #c2fd88 24%, #89fc80 100%); //green\n" + "linear-gradient(148deg, #fff 24%, #000 100%); //gray\n" + "`background-image: linear-gradient(to right, rgb(236, 72, 153), rgb(239, 68, 68), rgb(234, 179, 8));`\n" + "$highlight-rainbow: conic-gradient(from 195.94deg at 50% 50%, #FF1B71 -28.98deg, #E0201A 0.41deg, #EE3F16 27.93deg, #FF6128 54.73deg, #FDA206 88.8deg, #FFED00 117.65deg, #DFF051 145.77deg, #17AB70 175.77deg, #1A8F9C 207.65deg, #005AFF 239.36deg, #5C4ECE 274.87deg, #582C86 304.33deg, #FF1B71 331.02deg, #E0201A 360.41deg);\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