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 = "(\\d){1}\\t\\t(\\d){1,3}\\%\\s\\t(\\d){1}\\t(\\d){1,3}\\%"; final String string = "Current car character\n" + "Power Handling Acceleration\n" + "102 107 104\n" + "Car character points history\n\n" + "Car part Level Action Wear New level New wear\n" + "Chassis: 6 96% 6 96%\n" + "Engine: 7 100% 7 100%\n" + "Front wing: 8 70% 8 70%\n" + "Rear wing: 8 75% 8 75%\n" + "Underbody: 8 63% 8 63%\n" + "Sidepods: 8 91% 8 91%\n" + "Cooling: 8 80% 8 80%\n" + "Gearbox: 7 82% 7 82%\n" + "Brakes: 9 25% 9 25%\n" + "Suspension: 8 94% 8 94%\n" + "Electronics: 8 78% 8 78%\n\n" + "(\\d){1}\\t\\t(\\d){1,3}\\%\\s\\t(\\d){1}\\t(\\d){1,3}\\%"; 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