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

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 = "^(?P<mounting_type>Z)(?P<number_of_function>1)(?P<unit_type>S)(?P<unit_size>10)(?P<function_in_port>A|B|P|TA|TB)(?P<cracking_pressure>00|05|30|50)(?P<sep_1>-)(?P<mounting_position>1|2)(?P<orific_position_1>D|)(?P<orific_diameter_1>05|10|15|)(?P<function_in_port_2>B|P|TA|TB|)(?P<cracking_pressure_rv2>00|05|30|50|)(?P<sep_2>-|)(?P<mounting_position_rv2>1|2|)(?P<orific_position_2>D|)(?P<orific_diameter_2>05|10|15|)(?P<function_in_port_3>TA9|TB9|)(?P<sep_3>-)(?P<unit_series>4X)(?P<sep_4>/)(?P<seal_material>F|N)(?P<sep_5>/|)(?P<control_volume_flow>XY|)(?P<inspection_port>MA|MB|MP|MTA|)(?P<inspection_port_position>A|B|)(?P<surface_coating>J3|)(?P<sep_6>-|)(?P<special_version>068|120|)(?P<additional_details>(.|[0-9])*)$\n"; final String string = "Z1S10TA30-2TB9-4X/F\n" + "Z1S10TA50-2TB9-4X/F\n" + "Z1S10A30-2-4X/F\n" + "Z1S10A50-2-4X/F\n" + "Z1S10B30-2-4X/F\n" + "Z1S10A30-1-4X/F\n" + "Z1S10P30-1-4X/F\n" + "Z1S10P50-1-4X/F\n" + "Z1S10A30-2B30-2-4X/F\n" + "Z1S10A50-2B50-2-4X/F\n" + "Z1S10P30-1TA30-2TB9-4X/F\n" + "Z1S10P05-1-4X/F/MPB-068\n" + "Z1S10P05-1-4X/F/XY\n" + "Z1S10A05-1-4X/F/XY\n" + "Z1S10P05-1-4X/F\n" + "Z1S10TA05-2TB9-4X/F\n" + "Z1S10A05-2-4X/F\n" + "Z1S10A05-1-4X/F\n" + "Z1S10B05-1-4X/F\n" + "Z1S10B05-2-4X/F\n" + "Z1S10A05-2B05-2-4X/F\n" + "Z1S10P05-1TA05-2TB9-4X/F\n" + "Z1S10TA05-2TB9-4X/N\n" + "Z1S10TA50-2TB9-4X/N\n" + "Z1S10TA05-2TB05-2-4X/F/XY\n" + "Z1S10P05-1-4X/F/MPB\n" + "Z1S10P05-2-4X/F\n" + "Z1S10TA50-2TB9-4X/F-120\n" + "Z1S10A50-1-4X/F\n" + "Z1S10B30-1-4X/F\n" + "Z1S10B50-1-4X/F\n" + "Z1S10B50-2-4X/F\n" + "Z1S10P05-1TA50-2TB9-4X/F\n" + "Z1S10P30-1-4X/F/MPB-068\n" + "Z1S10P05-1-4X/N\n" + "Z1S10P50-1TA50-2TB9-4X/F\n" + "Z1S10P50-1-4X/F/XY\n" + "Z1S10TA05-2TB9-4X/F-120\n" + "Z1S10A05-2B05-2TB9-4X/F\n" + "Z1S10TA30-2TB9-4X/F-120\n" + "Z1S10P00-1-4X/F\n" + "Z1S10TB30-2-4X/F\n" + "Z1S10P00-1-4X/F/MPB-068\n" + "Z1S10TA05-2TB30-2-4X/N\n" + "Z1S10TA30-2TB30-2-4X/N\n" + "Z1S10TA30-2TB30-2-4X/F\n" + "Z1S10TA50-2TB50-2-4X/F\n" + "Z1S10P05-1TA05-2TB9-4X/N\n" + "Z1S10B05-2-4X/F/XY\n" + "Z1S10P30-1-4X/F/XY\n" + "Z1S10TA50-2TB50-2-4X/F/XY\n" + "Z1S10TA05-2TB05-2-4X/F\n" + "Z1S10P30-1-4X/F/J3\n" + "Z1S10P05-1TA05-2-4X/F/XY\n" + "Z1S10A05-2B05-2-4X/F/XY\n" + "Z1S10A30-2-4X/N\n" + "Z1S10TA00-2TB9-4X/F/J3\n" + "Z1S10P05-1TA30-2TB9-4X/F/J3\n" + "Z1S10B05-1-4X/N\n" + "Z1S10A05-2-4X/N\n" + "Z1S10B05-2-4X/N\n" + "Z1S10P50-1-4X/N\n" + "Z1S10TA30-2TB9-4X/N\n" + "Z1S10B05-1D15-4X/F\n" + "Z1S10TA05-2TB9-4X/F/J3\n" + "Z1S10TA05-2-4X/F\n" + "Z1S10TB05-1-4X/F/XY\n" + "Z1S10TA05-1-4X/F/XY\n" + "Z1S10P05-2-4X/F/XY\n" + "Z1S10P00-1-4X/F/MPB\n" + "Z1S10B00-2-4X/F\n" + "Z1S10TA00-2TB00-2-4X/F\n" + "Z1S10B00-1-4X/F\n" + "Z1S10TA50-2TB50-2-4X/N\n" + "Z1S10B05-1-4X/F/XY\n" + "Z1S10A00-2B00-2-4X/F\n" + "Z1S10TB05-2-4X/F\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