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 = "AND[ ]+(\\([ ]*\\[\\[[A-Z0-1_]+\\]\\][ ]+=[ ]+'[ ]*'[ ]+OR[ ]+[A-Z0-1_]+[ ]+=[ ]+\\[\\[[A-Z0-1_]+\\]\\][ ]*\\)|\\([ ]*[A-Z0-1_]+[ ]+=[ ]+\\[\\[[A-Z0-1_]+\\]\\][ ]+OR[ ]+\\[\\[[A-Z0-1_]+\\]\\][ ]+=[ ]+'[ ]*'[ ]*\\))"; final String string = "SELECT \n" + "ZT1_CODIGO, ZT1_NOME, A3_NREDUZ, ZT1_EMAIL, ZT1_DEPART, ZT1_SENHA, ZT1_CODGRU, ZT2_NOME, ZT1_DDD, ZT1_DDI, ZT1_TEL, ZT1_LOGIN, SUBSTR(ZT3_CODENT,3,6) A3_COD \n" + "FROM TABSX2(ZT1) ZT1 \n" + "LEFT JOIN TABSX2(ZT3) ZT3 \n" + "ON ZT3.ZT3_ENTIDA = 'SA3' AND ZT1.ZT1_CODIGO = ZT3.ZT3_CODIGO AND ZT3.D_E_L_E_T_ <> '*' \n" + "LEFT JOIN TABSX2(SA3) SA3 \n" + "ON SA3.A3_COD = SUBSTR(ZT3.ZT3_CODENT,3,6) AND SA3.D_E_L_E_T_ <> '*' \n" + "LEFT JOIN TABSX2(ZT2) ZT2 \n" + "ON ZT2.ZT2_CODIGO = ZT1.ZT1_CODGRU AND ZT2.D_E_L_E_T_ <> '*' \n" + "WHERE ZT1.D_E_L_E_T_ <> '*' AND (ZT1_CODGRU = [[GRUPO]] OR [[GRUPO]] = '') AND ([[GRUPO]] = '' OR ZT1_CODGRU = [[GRUPO]] ) AND ZT1_CODGRU = [[GRUPO]]"; 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