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 = "^\\}$"; final String string = "{\n" + " \"_score\": 1.0,\n" + " \"_index\": \"newsvit\",\n" + " \"_source\": {\n" + " \"content\": \" \\u0641\\u0647\\u06cc\\u0645\\u0647 \\u062d\\u0633\\u0646\\u200c\\u0645\\u06cc\\u0631\\u06cc: \",\n" + " \"title\": \"\\u06a9\\u0627\\u0631\\u0647\\u0627\\u06cc \\u0642\\u0627\\u0644\\u06cc\\u0628\\u0627\\u0641 \",\n" + " \"lead\": \"\\u062c\\u0627\\u0645\\u0639\\u0647&nbsp;&gt;&nbsp;\\u0634\\u0647\\u0631\\u06cc - \n" + " \\u0645\\u06cc\\u0632\\u06af\\u0631\\u062f\\u06cc \\u062f\\u0631\\u0628\\u0627\\u0631\\u0647 .\",\n" + " \"agency\": \"13\",\n" + " \"date_created\": 1494518193,\n" + " \"url\": \"http://www.khabaronline.ir/(X(1)S(bud4wg3ebzbxv51mj45iwjtp))/detail/663749/society/urban\",\n" + " \"image\": \"uploads/2017/05/11/1589793661.jpg\",\n" + " \"category\": \"15\"\n" + " },\n" + " \"_type\": \"news\",\n" + " \"_id\": \"2981643\"\n" + "}\n" + "{\n" + " \"_score\": 1.0,\n" + " \"_index\": \"newsvit\",\n" + " \"_source\": {\n" + " \"content\": \"\\u0645/\\u0630\",\n" + " \"title\": \"\\u0645\\u0639\\u0646\\u0648\\u06cc\\u062a \\u062f\\u0631 \\u0639\\u0635\\u0631 \",\n" + " \"lead\": \"\\u0645\\u062f\\u06cc\\u0631 \\u0645\\u0624\\u0633\\u0633\\u0647 \\u0639\\u0644\\u0645\\u06cc \\u0648 \\u067e\\u0698\\u0648\\u0647\\u0634\\u06cc \\u0627\\u0628\\u0646\\u200c\\u0633\\u06cc\\u0646\\u0627 \\u062f\\u0631 .\",\n" + " \"agency\": \"1\",\n" + " \"date_created\": 1494521817,\n" + " \"url\": \"http://www.farsnews.com/13960221001386\",\n" + " \"image\": \"uploads/2017/05/11/1713799235.jpg\",\n" + " \"category\": \"20\"\n" + " },\n" + " \"_type\": \"news\",\n" + " \"_id\": \"2981951\"\n" + "}\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