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

/
/
gm

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 = "^(?!FONT|2000)[^\"\\n]*\"\\K(?!\\s+\")([^\"]+)"; final String string = "/*\n" + " * PROJECT: Solitaire by Daniel \"EmuandCo\" Reimer\n" + " * LICENSE: Freeware, permission to use under Public Domain\n" + " * FILE: base/applications/games/solitaire/lang/en-US.rc\n" + " * PURPOSE: English Language File for Solitaire\n" + " * PROGRAMMERS: Daniel \"EmuandCo\" Reimer (reimer.daniel@freenet.de)\n" + " */\n" + "IDS_NO_SUCH_FILE \"FIND: %s: Plik nie został znaleziony\\n\", 6, 15, 5\n" + "LTEXT_BLANK \" \"\n" + "FONT 8, \"Arial\"\n" + "0 \"Some text\"\n" + "1 \" Some text \"\n" + "2000, \"Lautus Theme\"\n" + "2001, \"Lautus Theme\" \"ffafa\"\n" + "MENU IDR_MENU_SCIENTIFIC_1\n" + "FONT 8, \"MS Shell Dlg\", 0, 0, 0x1\n" + "BEGIN\n" + " GROUPBOX \"\", IDC_STATIC, 5 ,14, 141, 20\n" + " LTEXT \"Plik ten może być używany przez system operacyjny lub przez\\n\\\n" + "inną aplikację. Modyfikacja tego pliku może spowodować uszkodzenie twojego\\n\\\n" + "systemu lub uczynić go mniej funkcjonalnym.\\n\\n\\\n" + "Czy na pewno chcesz otworzyć ten plik?\", IDC_STATIC, 35, 5, 230, 60\n" + " DEFPUSHBUTTON \"Tak\", IDYES, 125, 55, 50, 14\n" + "IDS_USAGE \"FIND: Wyświetla wszystkie linie danego pliku, zawierające szukany ciąg znaków.\\n\\n\\\n" + " FIND [ /C ] [ /I ] [ /N ] [ /V ] \"\"ciąg znaków\"\" [ plik... ]\\n\\\n" + " /I Ignoruje wielkość liter\"\n" + " IDS_NO_SUCH_FILE \"FIND: %s: Plik nie został znaleziony\\n\""; 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