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
Processing...

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 = "HARRY((?:(?:(?!HARRY|DIVISION 3).|[\\r\\n])*?)DIVISION 3)"; final String string = "S3007/0011\n" + "20150590824\n" + "HARRY MOSES\n" + "F\n" + "32\n" + "DIVISION 4\n" + "CIV-'F' HIST-'D' GEO-'F' KISW-'D' ENGL-'D' PHY-'F' CHEM-'F' BIO-'F' B/MATH-'F' \n\n\n" + "S3007/0012\n" + "20151514797\n" + "HARRY MORGAN\n" + "F\n" + "26\n" + "DIVISION 3\n" + "CIV-'D' HIST-'C' GEO-'D' KISW-'C' ENGL-'C' PHY-'F' CHEM-'F' BIO-'D' B/MATH-'F' \n\n\n" + "S3007/0013\n" + "20151514798\n" + "HAPPINESS DEOGRATIAS\n" + "F\n" + "34\n" + "DIVISION 0\n" + "CIV-'F' HIST-'F' GEO-'F' KISW-'D' ENGL-'F' PHY-'F' CHEM-'F' BIO-'F' B/MATH-'F"; 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