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

r"
"
gm

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 = "^(?:\\\"Flesh)|^(?:\\\"Primitive)|^(?:\\\"Mutant)|^(?:\\\"Sacred)|^(?:\\\"Super)|^(?:\\\"Meat of)"; final String string = "\n" + "\"Black beetle killed. No beast soul gained. Eat the flesh of the black beetle to gain zero to ten geno points randomly.\"\n" + "\"Black beetle flesh eaten. Zero geno points gained.\"\n" + "\"Flesh of black beetle eaten. One sacred geno point gained.\"\n" + "\"Flesh of black beetle eaten. One sacred geno point gained.\"\n" + "\"Flesh of black beetle eaten. One sacred geno point gained.\"\n" + "\"Primitive creature green-scaled beast killed. No beast soul gained. Eat the flesh of the primitive green-scaled beast to gain zero to ten points randomly.\"\n" + "\"Primitive creature swift mantis killed. No beast soul gained. Eat the swift mantis to gain zero to ten primitive geno points randomly.\"\n" + "\"Primitive creature swift mantis killed. No beast soul gained. Eat the swift mantis to gain zero to ten points randomly.\"\n" + "\"Primitive creature swift mantis killed …\"\n" + "\"Primitive creature copper-toothed beast killed. No beast soul gained. Eat the flesh of copper-toothed beast to gain zero to ten primitive geno points randomly.\"\n" + "\"Primitive creature copper-toothed beast killed. Primitive beast soul of copper-toothed beast gained. Eat the flesh of copper-toothed beast to gain zero to ten primitive geno points randomly.\"\n" + "\"Sacred-blood bloody slayer killed. Sacred-blood beast soul bloody slayer gained. Eat the flesh of bloody slayer to gain zero to ten sacred geno points randomly.\"\n" + "\"Primitive green-scaled beast flesh eaten. One primitive geno point gained.\"\n" + "\"Mutant copper-toothed beast killed. No beast soul gained. Eat its flesh to gain zero to ten mutant geno points.\"\n" + "\"Mutant copper-toothed beast flesh eaten. One mutant geno point gained.\"\n" + "\"Primitive creature quartz scorpion killed. No beast soul gain. Eat the flesh of quartz scorpion to gain zero to ten primitive geno points.\"\n" + "\"Primitive quartz scorpion flesh eaten. Four primitive geno points gained.\"\n" + "\"Young obsidian dragon eaten. One sacred geno point gained…\"\n" + "\"Black beetle killed. No beast soul gained. Eat the flesh of the black beetle to gain zero to ten geno points randomly.\"\n" + "\"Black beetle flesh eaten. Zero geno points gained.\"\n" + "\"Flesh of black beetle eaten. One sacred geno point gained.\"\n" + "\"Flesh of black beetle eaten. One sacred geno point gained.\"\n" + "\"Flesh of black beetle eaten. One sacred geno point gained.\"\n" + "\"Primitive creature green-scaled beast killed. No beast soul gained. Eat the flesh of the primitive green-scaled beast to gain zero to ten points randomly.\"\n" + "\"Primitive creature swift mantis killed. No beast soul gained. Eat the swift mantis to gain zero to ten primitive geno points randomly.\"\n" + "\"Primitive creature swift mantis killed. No beast soul gained. Eat the swift mantis to gain zero to ten points randomly.\"\n" + "\"Primitive creature swift mantis killed …\"\n" + "\"Primitive creature copper-toothed beast killed. No beast soul gained. Eat the flesh of copper-toothed beast to gain zero to ten primitive geno points randomly.\"\n" + "\"Primitive creature copper-toothed beast killed. Primitive beast soul of copper-toothed beast gained. Eat the flesh of copper-toothed beast to gain zero to ten primitive geno points randomly.\"\n" + "\"Sacred-blood bloody slayer killed. Sacred-blood beast soul bloody slayer gained. Eat the flesh of bloody slayer to gain zero to ten sacred geno points randomly.\"\n" + "\"Primitive green-scaled beast flesh eaten. One primitive geno point gained.\"\n" + "\"Mutant copper-toothed beast killed. No beast soul gained. Eat its flesh to gain zero to ten mutant geno points.\"\n" + "\"Mutant copper-toothed beast flesh eaten. One mutant geno point gained.\"\n" + "\"Primitive creature quartz scorpion killed. No beast soul gain. Eat the flesh of quartz scorpion to gain zero to ten primitive geno points.\"\n" + "\"Primitive quartz scorpion flesh eaten. Four primitive geno points gained.\"\n" + "\"Young obsidian dragon eaten. One sacred geno point gained…\"\n" + "\"Sacred-blood creature purple-winged dragon killed. Sacred-blood beast soul of purple-winged dragon gained. Eat the flesh of purple-winged dragon to gain zero to ten sacred-blood geno points randomly.\"\n" + "\"Sacred-blood copper-toothed beast killed. No beast soul gained. Eat its meat to gain one to ten sacred geno points randomly.\"\n" + "\"Meat of copper-toothed beast eaten. One sacred geno point gained.\"\n" + "\"Meat of copper-toothed beast eaten. One sacred geno point gained.\""; 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