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

/
/
ig

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 = "((https?|ftp):\\/\\/)?([a-z0-9+!*(),;?&=.-]+(:[a-z0-9+!*(),;?&=.-]+)?@)?([a-z0-9\\-\\.]*)\\.(([a-z]{2,4})|([0-9]{1,3}\\.([0-9]{1,3})\\.([0-9]{1,3})))(:[0-9]{2,5})?(\\/([a-z0-9+%-]\\.?)+)*\\/?(\\?[a-z+&$_.-][a-z0-9;:@&%=+/.-]*)?(#[a-z_.-][a-z0-9+$%_.-]*)?"; final String string = "rew ewrwe http://192.168.1.100:10/\n" + "erewrw ew 192.168.1.100/1e rwerrewdsfsdf \n" + "werew rrew we vk.com we ewr werw\n" + " erewr http://vk.com/ ewrwe\n" + "ewrew https://vk.com/ werew\n" + "www.vk.com\n" + "my age is : 60. and ...\n" + "ятх.рф\n" + "ыщьу ... dfggd\n\n" + "Служу в армии?\n" + "Еще целый год терпеть это убожество\n" + "Ростом 1.90 см?\n" + "За остальным в л.с :)\n\n" + "http://test.test-75.1474.stackoverflow.com/\n" + "https://www.stackoverflow.com\n" + "https://www.stackoverflow.com/\n" + "http://wwww.stackoverflow.com/\n" + "http://wwww.stackoverflow.com\n\n\n" + "http://test.test-75.1474.stackoverflow.com/\n" + "http://www.stackoverflow.com\n" + "http://www.stackoverflow.com/\n" + "stackoverflow.com/\n" + "stackoverflow.com\n\n" + "http://www.example.com/etcetc\n" + "www.example.com/etcetc\n" + "example.com/etcetc\n" + "user:pass@example.com/etcetc\n\n" + "example.com/etcetc?query=aasd\n" + "example.com/etcetc?query=aasd&dest=asds\n\n" + "http://stackoverflow.com/questions/6427530/regular-expression-pattern-to-match-url-with-or-without-http-www\n" + "http://stackoverflow.com/questions/6427530/regular-expression-pattern-to-match-url-with-or-without-http-www/\n" + "my age is: 60. and ..."; final Pattern pattern = Pattern.compile(regex, 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