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

r"
"
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 = "<td>((?:<span.*\\n*){3})</td>"; final String string = "<tr>\n" + "<td><a href=\"/wiki/Nanga_Parbat\" title=\"Nanga Parbat\">Nanga Parbat</a></td>\n\n" + "<td style=\"text-align: right;\">8126&#160;m<br />\n" + "26,660&#160;ft</td>\n\n" + "<td><span class=\"nowrap\"><span class=\"flagicon\"><a href=\"/wiki/Pakistan\" title=\"Pakistan\"><img alt=\"Pakistan\" src=\"//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Flag_of_Pakistan.svg/23px-Flag_of_Pakistan.svg.png\" width=\"23\" height=\"15\" class=\"thumbborder\" srcset=\"//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Flag_of_Pakistan.svg/35px-Flag_of_Pakistan.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/32/Flag_of_Pakistan.svg/45px-Flag_of_Pakistan.svg.png 2x\" data-file-width=\"900\" data-file-height=\"600\" /></a></span> <a href=\"/wiki/Pakistan\" title=\"Pakistan\">Pakistan</a></span></td>\n\n" + "<td style=\"text-align: right;\">3 Jul 1953</td>\n\n" + "<td><span class=\"nowrap\"><span class=\"flagicon\"><a href=\"/wiki/Austria\" title=\"Austria\"><img alt=\"Austria\" src=\"//upload.wikimedia.org/wikipedia/commons/thumb/4/41/Flag_of_Austria.svg/23px-Flag_of_Austria.svg.png\" width=\"23\" height=\"15\" class=\"thumbborder\" srcset=\"//upload.wikimedia.org/wikipedia/commons/thumb/4/41/Flag_of_Austria.svg/35px-Flag_of_Austria.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/41/Flag_of_Austria.svg/45px-Flag_of_Austria.svg.png 2x\" data-file-width=\"900\" data-file-height=\"600\" /></a></span> <a href=\"/wiki/Hermann_Buhl\" title=\"Hermann Buhl\">Hermann Buhl</a></span></td>\n\n" + "<td style=\"text-align: right;\">26 Feb 2016</td>\n\n" + "<td><span class=\"nowrap\"><span class=\"flagicon\"><a href=\"/wiki/Italy\" title=\"Italy\"><img alt=\"Italy\" src=\"//upload.wikimedia.org/wikipedia/en/thumb/0/03/Flag_of_Italy.svg/23px-Flag_of_Italy.svg.png\" width=\"23\" height=\"15\" class=\"thumbborder\" srcset=\"//upload.wikimedia.org/wikipedia/en/thumb/0/03/Flag_of_Italy.svg/35px-Flag_of_Italy.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/0/03/Flag_of_Italy.svg/45px-Flag_of_Italy.svg.png 2x\" data-file-width=\"1500\" data-file-height=\"1000\" /></a></span> <a href=\"/wiki/Simone_Moro\" title=\"Simone Moro\">Simone Moro</a></span><br />\n" + "<span class=\"nowrap\"><span class=\"flagicon\"><a href=\"/wiki/Pakistan\" title=\"Pakistan\"><img alt=\"Pakistan\" src=\"//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Flag_of_Pakistan.svg/23px-Flag_of_Pakistan.svg.png\" width=\"23\" height=\"15\" class=\"thumbborder\" srcset=\"//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Flag_of_Pakistan.svg/35px-Flag_of_Pakistan.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/32/Flag_of_Pakistan.svg/45px-Flag_of_Pakistan.svg.png 2x\" data-file-width=\"900\" data-file-height=\"600\" /></a></span> <a href=\"/w/index.php?title=Muhammad_Ali_Sadpara&amp;action=edit&amp;redlink=1\" class=\"new\" title=\"Muhammad Ali Sadpara (page does not exist)\">Muhammad Ali Sadpara</a></span><br />\n" + "<span class=\"nowrap\"><span class=\"flagicon\"><a href=\"/wiki/Spain\" title=\"Spain\"><img alt=\"Spain\" src=\"//upload.wikimedia.org/wikipedia/en/thumb/9/9a/Flag_of_Spain.svg/23px-Flag_of_Spain.svg.png\" width=\"23\" height=\"15\" class=\"thumbborder\" srcset=\"//upload.wikimedia.org/wikipedia/en/thumb/9/9a/Flag_of_Spain.svg/35px-Flag_of_Spain.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/9a/Flag_of_Spain.svg/45px-Flag_of_Spain.svg.png 2x\" data-file-width=\"750\" data-file-height=\"500\" /></a></span> <a href=\"/w/index.php?title=Alex_Txikon&amp;action=edit&amp;redlink=1\" class=\"new\" title=\"Alex Txikon (page does not exist)\">Alex Txikon</a></span></td>\n\n" + "<td style=\"text-align: right;\">335</td>\n" + "<td style=\"text-align: right;\">68</td>\n" + "<td style=\"text-align: right;\">20.3%</td>\n" + "<td style=\"text-align: right;\">77%</td>\n" + "<td style=\"text-align: right;\">5.5%</td>\n" + "</tr>\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