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

/
/
gim

Test String

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 = "(?<!x)(?=(?:[._ –-]*\\d){9})(?!9|66\\D*6|00\\D*0|(?:\\d\\D*){3}0\\D*0|(?:\\d\\D*){5}0(?:\\D*0){3})\\d{2,}[._ –-]*\\d{2,}[._ –-]*\\d{2,}"; final String string = "x123456789\n" + "X123456789\n" + "x123-456-789\n" + "X123-456-789\n" + "123-456-789\n" + "ordernumber123-456-789\n" + "order number123-456789\n" + "order number 123456789\n" + "123-456789\n" + "123456789\n" + "ordernumber-x123456787\n" + "ordernumber-123456787\n" + "ordernumber - 123456789\n" + "ordernumber #123456789\n" + "ordernumber *anysplcharacter*123456789\n" + "ordernumber !@#$%^&123456789\n" + "123456789*@*#123456789\n" + "social security number 123-456-789\n" + "ordernumber !@#$%^&x123456789\n" + "123456789\n" + "#@%#$%#$123456789#$%#$^$#\n\n" + "123456789\n" + "123 45 6789\n" + "123-45-6789\n" + "123-45-6789\n" + "123 – 45 – 6789\n" + "123.45.6789\n" + "123_45_6789\n" + "123 456 789\n" + "123-456-789\n" + "123 – 456 – 789\n" + "123.456.789\n" + "123_456_789\n" + "1234 56 789\n" + "1234-56-789\n" + "1234 – 56 – 789\n" + "1234.56.789\n" + "1234_56_789\n" + "12 345 6789\n" + "12-345-6789\n" + "12 – 345 – 6789\n" + "12.345.6789\n" + "12_345_6789\n\n" + "The number should not be matched at all for the following rules.\n\n" + "If the number beginning with the number “9”\n" + "912345678\n" + "912000000\n\n" + "If the number “666” in positions 1 – 3.\n" + "666000000\n" + "666450000\n" + "666129876\n\n" + "If the number “000” in positions 1 – 3.\n" + "000000000\n" + "000450000\n" + "000120000\n\n" + "If the number “00” in positions 4 – 5.\n" + "123006789\n" + "876001234\n" + "765003456\n\n" + "if the number “0000” in positions 6 – 9\n" + "123450000\n" + "123000000\n" + "876000000\n\n"; final Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE | 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