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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

/
/
gm

Test String

Substitution

Processing...

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 = "([A-Z]+?)\\s([A-Z]+)\\s"; final String string = "ACCS Access CRST Crest GRA Grange PLAT Plateau SLPE Slope\n" + "ALLY Alley CRSS Cross GRN Green PLZA Plaza SND Sound\n" + "ALWY Alleyway CRSG Crossing GRND Ground PKT Pocket SPUR Spur\n" + "AMBL Amble CRD Crossroad GR Grove PNT Point SQ Square\n" + "ANCG Anchorage COWY Crossway GLY Gully PORT Port STRS Stairs\n" + "APP Approach CUWY Cruiseway HTS Heights PROM Promenade SHWY State Highway\n" + "ARC Arcade CDS Cul-de-sac HRD Highroad QUAD Quad STPS Steps\n" + "ART Artery CITG Cutting HWY Highway QDGL Quadrangle STRA Strand\n" + "AVE Avenue DALE Dale HILL Hill QDRT Quadrant ST Street\n" + "BASN Basin DELL Dell INTG Interchange QY Quay STRP Strip\n" + "BCH Beach DEVN Deviation INTN Intersection QYS Quays SBWY Subway\n" + "BEND Bend DIP Dip INC Junction RMBL Ramble TARN Tarn\n" + "BLK Block DSTR Distributor KEY Key RAMP Ramp TCE Terrace\n" + "BVD Boulevard DR Drive LDG Landing RNGE Range THOR Thoroughfare\n" + "BRCE Brace DRWY Driveway LANE Lane RCH Reach TLWY Tollway\n" + "BRAE Brae EDGE Edge LNWY Laneway RES Reserve TOP Top\n" + "BRK Break ELB Elbow LEES Lees REST Rest TOR Tor\n" + "BDGE Bridge END End LNE Line RTT Retreat TWRS Towers\n" + "BDWY Broadway ENT Entrance LINK Link RIDE Ride TRK Track\n" + "BROW Brow ESP Esplanade LT Little RDGE Ridge TRL Trail\n" + "BYPA Bypass EST Estate LKT Lookout RGWY Ridgeway TRLR Trailer\n" + "BYWY Byway EXP Expressway LOOP Loop ROWY Right of TRI Triangle\n" + "CAUS Causeway EXTN Extension LWR Lower RING Ring TKY Trunkway\n" + "CTR Centre FAWY Fairway MALL Mall RISE Rise TURN TURN"; final String subst = "const STREET_TYPE_$1 = '$1';\\n"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); // The substituted value will be contained in the result variable final String result = matcher.replaceAll(subst); System.out.println("Substitution result: " + result); } }

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