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

/
/
gm

Test String

Substitution

Processing...

Code Generator

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "^( \\d|\\d\\d) "; final String string = " 1 (function(inDesignMode) {\n" + " 2 'use strict';\n" + " 3 ObjC.import('stdlib');\n" + " 4 \n" + " 5 function getPluginParameter(name) {\n" + " 6 var envName = \"KMPARAM_\" + name.replace(/ /g, \"_\");\n" + " 7 var result;\n" + " 8 \n" + " 9 if (!inDesignMode) {\n" + "10 result = $.getenv(envName);\n" + "11 return result ? result.trim() : \"\";\n" + "12 }\n" + "13 \n" + "14 var designingParams = {\n" + "15 KMPARAM_Sort_Order: \"newest first\",\n" + "16 KMPARAM_Timestamp_Format: \"date + time + duration\"\n" + "17 };\n" + "18 \n" + "19 result = designingParams[envName];\n" + "20 if (result === undefined)\n" + "21 throw Error(\"Unknown Plugin Parameter Name '\" + name + \"' while in designing mode\");\n" + "22 return result;\n" + "23 }\n" + "24 \n" + "25 function execute() {\n" + "26 var sortOrder = getPluginParameter(\"Sort Order\");\n" + "27 var timestampFormat = getPluginParameter(\"Timestamp Format\");\n" + "28 \n" + "29 return \"Sort Order: '\" + sortOrder + \"'\\nTimestamp Format: '\" + timestampFormat + \"'\";\n" + "30 }\n" + "31 \n" + "32 if (inDesignMode) {\n" + "33 return execute();\n" + "34 } else {\n" + "35 try {\n" + "36 return execute();\n" + "37 } catch (e) {\n" + "38 return e.message;\n" + "39 }\n" + "40 }\n" + "41 })(true);"; final String subst = ""; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); // The substituted value will be contained in the result variable final String result = matcher.replaceAll(subst); System.out.println("Substitution result: " + result); } }

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