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

/
/
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 = "(?i)(.*((\\bown(er|re)\\b)|(\\bocc?up(eir|ier|ire)\\b)s?).*)"; final String string = "customer_name\n" + "Miss. amber Lowe\n" + "Ms. zara scantlebury\n" + "Mrs. Jacky Kalonda\n" + "Mrs. Cynthia Williams\n" + "Mr. Suresh Kotecha\n" + "Rebecca Bormer\n" + "Mr. Affan Hashmi\n" + "Mr. William Dormand\n" + "Mr. Andrew MacIntosh\n" + "Mr. Kieran Ross\n" + "Mrs. rachel pezerovic\n" + "Mr. David Abbott\n" + "Mrs. Fazal Jan Butt\n" + "Owner Occupier\n" + "Mrs. Barbara Feerick\n" + "Mr. Gary Rendell\n" + "Mrs. Natalie Farrell\n" + "Ms. Sally Janani\n" + "Mr. Chris Tween\n" + "Mr. Shahid Ali\n" + "Mr. Govanmurad saifi\n" + "Ms. Vera Lucia\n" + "Nicola Smith\n" + "Mr. Andrew Jessop\n" + "Ashley Phoenix\n" + "Mrs. Rosalie Cross\n" + "Ms. Patricia Smith\n" + "Martin Stewart\n" + "Mr. zakir nazmin\n" + "Owner Occupier\n" + "Mr. Leeanne Jasper\n" + "Owner Occupier\n" + ". Mr Yousuf Munshi C/O Mrs Zulekhan Munshi\n" + "Owner Occupier\n" + "Miss. Gemma Johnson\n" + "Mr. Michael Brown\n" + "Owner Occupiers\n" + "Mr. paul atkins\n" + "Karen Taylor\n" + "Mr. Yusuf Hassan\n" + "Mrs Teresa Geeson\n" + "Mr. Paul Regan\n" + "Mrs Pat Robinson\n" + "Mr. Patrick Jones\n" + "Mrs. chapanben bava\n" + "Mr. Nadeem Tariq\n" + "Mr. Kiran Jayaprakash\n" + "Kris Henley\n" + "Mrs. Denise Gouge\n" + "Mr. Dilip Gurung\n" + "Owner Occupier\n" + "Miss Stephanie Hamman\n" + "Mr. Richard Sneddon\n" + "Mr. AvtarSingh Chauhan\n" + "Mr. Simon Smithen\n" + "Owner Occupier\n" + "Mr. Hussein Hydari\n" + "Mr. kirk wragg\n" + "Mr. Melvyn Orton\n" + "Mr. Derrick Moy\n" + "Miss. Jade Rogers\n" + "Mr. Adam Farnen\n" + "Mr. Mohammad Hossain\n" + "Lauran Kilpatrick\n" + "Mr. Dennis Buffrey\n" + "Mr. Bruce Jones\n" + "Mr. Phillip Christey\n" + "Christine Searle\n" + "Mr. Timothy Shaw\n" + "Mrs. yijia liu\n" + "Mr. Barry Nell\n" + "Mrs. Caroline Rabaiotti\n" + "Owner Occupier\n" + "Mrs. Hazel Bell\n" + "Craig Barrow\n" + "Mr. Mani Dhaliwal\n" + "Mr. Linda Maynard\n" + "Mrs. Amanda Jooma\n" + "Mr. eamon monaghan\n" + "Victoria Fairbourne\n" + "Mrs. Tasleem Akhtar\n" + "Mrs. Cheryl Woollett\n" + "Mr. Alexander Smith\n" + "Mrs. jane beaumont\n" + "Mr. david fergusson\n" + "Mr. Masood Ahmed\n" + "Clare Turner\n" + "Owner Occupier\n" + "Mr. Malcolm Hutchinson\n" + "Jim Stobo\n" + "Mr. richard upton\n" + "Mr. David Canvin\n" + "Miss. Nicola Carlin\n" + "Mr. Jason Kingsley\n" + "Mr Michael Sangster\n" + "Christopher Hill\n" + "Mrs. Balvinder Brar\n" + "Miss. Donna Walsh\n" + "Mark Armstrong\n" + "Miss. Ade Robinson Oshodi\n" + "owner occupier\n" + "Mr. CARE OF Lauristons\n" + "Owner Occupier\n" + "Mr. david Riley"; 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