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 = "(?smx)\n" + "(?(DEFINE)\n" + " (?<jsonObject>\n" + " \\{(?&jsonField)(?>,(?&jsonField))*+\\}|\n" + " \\{[[:space:]]*+\\}\n" + " )\n" + " (?<jsonArray>\n" + " \\[(?&jsonValue)(?>,(?&jsonValue))*+\\]|\n" + " \\[[[:space:]]*+\\]\n" + " )\n" + " (?<string>\n" + " \"\n" + " [^\"\\\\]*+\n" + " (?>\n" + " (?>\n" + " \\\\[\"\\\\\\/rntfb]|\n" + " \\\\u[[:xdigit:]]{4}\n" + " )++\n" + " [^\"\\\\]*+\n" + " )*+\n" + " \"\n" + " )\n" + " (?<number>\n" + " \\-?+\n" + " (?>\n" + " [1-9][[:digit:]]*+|\n" + " 0\n" + " )\n" + " (?>\\.[[:digit:]]++)?+\n" + " (?>[eE][\\+\\-]?+[[:digit:]]++)?+\n" + " )\n" + " (?<jsonValue>\n" + " [[:space:]]*+\n" + " (?>\n" + " (?&string)|\n" + " (?&number)|\n" + " (?&jsonObject)|\n" + " (?&jsonArray)|\n" + " false|\n" + " true|\n" + " null\n" + " )\n" + " [[:space:]]*+\n" + " )\n" + " (?<jsonField>\n" + " [[:space:]]*+(?&string)[[:space:]]*+\\:\n" + " (?&jsonValue)\n" + " )\n" + ")\n" + "^(?&jsonValue),\\n"; final String string = "null,\n" + " null,\n" + "null ,\n" + " null ,\n" + "false,\n" + " false,\n" + "false ,\n" + " false ,\n" + "true,\n" + " true,\n" + "true ,\n" + " true ,\n" + "123,\n" + "0,\n" + "-123,\n" + "-0,\n" + "123.0,\n" + "0.0,\n" + "-123.0,\n" + "-0.0,\n" + "123e1,\n" + "0e1,\n" + "-123e1,\n" + "-0e1,\n" + "123.0e1,\n" + "0.0e1,\n" + "-123.0e1,\n" + "-0.0e1,\n" + "123e+1,\n" + "0e+1,\n" + "-123e+1,\n" + "-0e+1,\n" + "123.0e+1,\n" + "0.0e+1,\n" + "-123.0e+1,\n" + "-0.0e+1,\n" + "123e-1,\n" + "0e-1,\n" + "-123e-1,\n" + "-0e-1,\n" + "123.0e-1,\n" + "0.0e-1,\n" + "-123.0e-1,\n" + "-0.0e-1,\n" + "123E1,\n" + "0E1,\n" + "-123E1,\n" + "-0E1,\n" + "123.0E1,\n" + "0.0E1,\n" + "-123.0E1,\n" + "-0.0E1,\n" + "123E+1,\n" + "0E+1,\n" + "-123E+1,\n" + "-0E+1,\n" + "123.0E+1,\n" + "0.0E+1,\n" + "-123.0E+1,\n" + "-0.0E+1,\n" + "123E-1,\n" + "0E-1,\n" + "-123E-1,\n" + "-0E-1,\n" + "123.0E-1,\n" + "0.0E-1,\n" + "-123.0E-1,\n" + "-0.0E-1,\n" + " 123,\n" + " 0,\n" + " -123,\n" + " -0,\n" + " 123.0,\n" + " 0.0,\n" + " -123.0,\n" + " -0.0,\n" + " 123e1,\n" + " 0e1,\n" + " -123e1,\n" + " -0e1,\n" + " 123.0e1,\n" + " 0.0e1,\n" + " -123.0e1,\n" + " -0.0e1,\n" + " 123e+1,\n" + " 0e+1,\n" + " -123e+1,\n" + " -0e+1,\n" + " 123.0e+1,\n" + " 0.0e+1,\n" + " -123.0e+1,\n" + " -0.0e+1,\n" + " 123e-1,\n" + " 0e-1,\n" + " -123e-1,\n" + " -0e-1,\n" + " 123.0e-1,\n" + " 0.0e-1,\n" + " -123.0e-1,\n" + " -0.0e-1,\n" + " 123E1,\n" + " 0E1,\n" + " -123E1,\n" + " -0E1,\n" + " 123.0E1,\n" + " 0.0E1,\n" + " -123.0E1,\n" + " -0.0E1,\n" + " 123E+1,\n" + " 0E+1,\n" + " -123E+1,\n" + " -0E+1,\n" + " 123.0E+1,\n" + " 0.0E+1,\n" + " -123.0E+1,\n" + " -0.0E+1,\n" + " 123E-1,\n" + " 0E-1,\n" + " -123E-1,\n" + " -0E-1,\n" + " 123.0E-1,\n" + " 0.0E-1,\n" + " -123.0E-1,\n" + " -0.0E-1,\n" + "123 ,\n" + "0 ,\n" + "-123 ,\n" + "-0 ,\n" + "123.0 ,\n" + "0.0 ,\n" + "-123.0 ,\n" + "-0.0 ,\n" + "123e1 ,\n" + "0e1 ,\n" + "-123e1 ,\n" + "-0e1 ,\n" + "123.0e1 ,\n" + "0.0e1 ,\n" + "-123.0e1 ,\n" + "-0.0e1 ,\n" + "123e+1 ,\n" + "0e+1 ,\n" + "-123e+1 ,\n" + "-0e+1 ,\n" + "123.0e+1 ,\n" + "0.0e+1 ,\n" + "-123.0e+1 ,\n" + "-0.0e+1 ,\n" + "123e-1 ,\n" + "0e-1 ,\n" + "-123e-1 ,\n" + "-0e-1 ,\n" + "123.0e-1 ,\n" + "0.0e-1 ,\n" + "-123.0e-1 ,\n" + "-0.0e-1 ,\n" + "123E1 ,\n" + "0E1 ,\n" + "-123E1 ,\n" + "-0E1 ,\n" + "123.0E1 ,\n" + "0.0E1 ,\n" + "-123.0E1 ,\n" + "-0.0E1 ,\n" + "123E+1 ,\n" + "0E+1 ,\n" + "-123E+1 ,\n" + "-0E+1 ,\n" + "123.0E+1 ,\n" + "0.0E+1 ,\n" + "-123.0E+1 ,\n" + "-0.0E+1 ,\n" + "123E-1 ,\n" + "0E-1 ,\n" + "-123E-1 ,\n" + "-0E-1 ,\n" + "123.0E-1 ,\n" + "0.0E-1 ,\n" + "-123.0E-1 ,\n" + "-0.0E-1 ,\n" + " 123 ,\n" + " 0 ,\n" + " -123 ,\n" + " -0 ,\n" + " 123.0 ,\n" + " 0.0 ,\n" + " -123.0 ,\n" + " -0.0 ,\n" + " 123e1 ,\n" + " 0e1 ,\n" + " -123e1 ,\n" + " -0e1 ,\n" + " 123.0e1 ,\n" + " 0.0e1 ,\n" + " -123.0e1 ,\n" + " -0.0e1 ,\n" + " 123e+1 ,\n" + " 0e+1 ,\n" + " -123e+1 ,\n" + " -0e+1 ,\n" + " 123.0e+1 ,\n" + " 0.0e+1 ,\n" + " -123.0e+1 ,\n" + " -0.0e+1 ,\n" + " 123e-1 ,\n" + " 0e-1 ,\n" + " -123e-1 ,\n" + " -0e-1 ,\n" + " 123.0e-1 ,\n" + " 0.0e-1 ,\n" + " -123.0e-1 ,\n" + " -0.0e-1 ,\n" + " 123E1 ,\n" + " 0E1 ,\n" + " -123E1 ,\n" + " -0E1 ,\n" + " 123.0E1 ,\n" + " 0.0E1 ,\n" + " -123.0E1 ,\n" + " -0.0E1 ,\n" + " 123E+1 ,\n" + " 0E+1 ,\n" + " -123E+1 ,\n" + " -0E+1 ,\n" + " 123.0E+1 ,\n" + " 0.0E+1 ,\n" + " -123.0E+1 ,\n" + " -0.0E+1 ,\n" + " 123E-1 ,\n" + " 0E-1 ,\n" + " -123E-1 ,\n" + " -0E-1 ,\n" + " 123.0E-1 ,\n" + " 0.0E-1 ,\n" + " -123.0E-1 ,\n" + " -0.0E-1 ,\n" + "\"\",\n" + "\"zyxwvuts\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\u1234\\uabcd\\uABCD\",\n" + "\"zyxwvutszyxwvuts\",\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCD\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + "\"\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + "\"zyxwvutszyxwvutszyxwvuts\",\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + "\"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\",\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + "\"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + "\"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\",\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + "\"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\",\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + " \"\",\n" + " \"zyxwvuts\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\u1234\\uabcd\\uABCD\",\n" + " \"zyxwvutszyxwvuts\",\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCD\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + " \"\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + " \"zyxwvutszyxwvutszyxwvuts\",\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + " \"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\",\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\",\n" + " \"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" + " \"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\",\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + " \"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\",\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" + "\"\" ,\n" + "\"zyxwvuts\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\u1234\\uabcd\\uABCD\" ,\n" + "\"zyxwvutszyxwvuts\" ,\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + "\"zyxwvutszyxwvutszyxwvuts\" ,\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + "\"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + "\"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + "\"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + "\"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + " \"\" ,\n" + " \"zyxwvuts\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\u1234\\uabcd\\uABCD\" ,\n" + " \"zyxwvutszyxwvuts\" ,\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + " \"zyxwvutszyxwvutszyxwvuts\" ,\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + " \"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" + " \"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" + " \"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + " \"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" + " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" + "{},\n" + "{ },\n" + "{\"1\":1},\n" + "{ \"1\" : 1 },\n" + "{\"1\":1,\"2\":2},\n" + "{ \"1\" : 1, \"2\" : 2 },\n" + " {},\n" + " { },\n" + " {\"1\":1},\n" + " { \"1\" : 1 },\n" + " {\"1\":1,\"2\":2},\n" + " { \"1\" : 1, \"2\" : 2 },\n" + "{} ,\n" + "{ } ,\n" + "{\"1\":1} ,\n" + "{ \"1\" : 1 } ,\n" + "{\"1\":1,\"2\":2} ,\n" + "{ \"1\" : 1, \"2\" : 2 } ,\n" + " {} ,\n" + " { } ,\n" + " {\"1\":1} ,\n" + " { \"1\" : 1 } ,\n" + " {\"1\":1,\"2\":2} ,\n" + " { \"1\" : 1, \"2\" : 2 } ,\n" + "[],\n" + "[ ],\n" + "[1],\n" + "[ 1 ],\n" + "[1,2],\n" + "[ 1, 2 ],\n" + " [],\n" + " [ ],\n" + " [1],\n" + " [ 1 ],\n" + " [1,2],\n" + " [ 1, 2 ],\n" + "[] ,\n" + "[ ] ,\n" + "[1] ,\n" + "[ 1 ] ,\n" + "[1,2] ,\n" + "[ 1, 2 ] ,\n" + " [] ,\n" + " [ ] ,\n" + " [1] ,\n" + " [ 1 ] ,\n" + " [1,2] ,\n" + " [ 1, 2 ] ,\n" + "{\"x\":{}},\n" + "{\"x\":[]},\n" + "{ \"x\" : {} },\n" + "{ \"x\" : [] },\n" + "[{}],\n" + "[[]],\n" + "[ { } ],\n" + "[ [ ] ],\n" + " {\"x\":{}},\n" + " {\"x\":[]},\n" + " { \"x\" : {} },\n" + " { \"x\" : [] },\n" + " [{}],\n" + " [[]],\n" + " [ { } ],\n" + " [ [ ] ],\n" + "{\"x\":{}} ,\n" + "{\"x\":[]} ,\n" + "{ \"x\" : {} } ,\n" + "{ \"x\" : [] } ,\n" + "[{}] ,\n" + "[[]] ,\n" + "[ { } ] ,\n" + "[ [ ] ] ,\n" + " {\"x\":{}} ,\n" + " {\"x\":[]} ,\n" + " { \"x\" : {} } ,\n" + " { \"x\" : [] } ,\n" + " [{}] ,\n" + " [[]] ,\n" + " [ { } ] ,\n" + " [ [ ] ] ,\n\n" + "#values to NOT match\n" + "Null,\n" + "False,\n" + "True,\n" + "01,\n" + "+1,\n" + "1.,\n" + "\" \" \",\n" + "\" \\ \",\n" + "\" \\x \",\n" + "\"\"x,\n"; 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