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 = "\"\\w+\"=.+?,(?=\")"; final String string = "{\"Ra03\"=0,\"Ra10\"=0,\"CellWom\"=(0,0),\"RaTableRaw\"=(<00550060001d001e0025002c001f0023002200230028002b002f004a00a90119>,<0000005d001c001d0024002b001f00240023002400280029002e0046009700fb>,<00550060001d001e0024002b001f0022002100220027002a002d0048009b0103>),\"Qstart\"=0,\"AdapterPower\"=1091223498,\"DailyMinSoc\"=93,\"Ra04\"=0,\"CurrentSenseMonitorStatus\"=0,\"Ra11\"=0,\"CellVoltage\"=(4314,4313,4312),\"PackCurrentAccumulator\"=961564,\"PassedCharge\"=18446744073709551404,\"Flags\"=16777729,\"PresentDOD\"=(1,1,1),\"Ra05\"=0,\"Ra12\"=0,\"FccComp1\"=8690,\"ChemID\"=20784,\"iMaxAndSocSmoothTable\"=<0000000000000000000000000000000000000000000000000000000000000000>,\"FccComp2\"=8690,\"PackCurrentAccumulatorCount\"=45405,\"DOD0\"=(528,520,520),\"Ra06\"=0,\"ResScale\"=0,\"Ra13\"=0,\"WeightedRa\"=0,\"FilteredCurrent\"=0,\"RSS\"=0,\"CellCurrentAccumulatorCount\"=0,\"Serial\"=\"F5D21977VYGQ1LWB0\",\"DataFlashWriteCount\"=1764,\"DailyMaxSoc\"=100,\"Ra07\"=0,\"Ra14\"=0,\"MaxCapacity\"=100,\"ChemicalWeightedRa\"=0,\"Ra00\"=0,\"BatteryHealthMetric\"=0,\"DesignCapacity\"=8694,\"Ra08\"=0,\"BatteryState\"=<0000000000000000c3e4001206010002>,\"CellCurrentAccumulator\"=(0,0),\"AlgoChemID\"=20784,\"MfgData\"=<000000000b0001000a1400000431393136033030320341544c00090000000000>,\"ManufactureDate\"=62879213563955,\"ISS\"=0,\"Ra01\"=0,\"Soc1Voltage\"=0,\"QmaxDisqualificationReason\"=0,\"ChargeAccum\"=0,\"SimRate\"=0,\"Qmax\"=(9174,9189,9180),\"PMUConfigured\"=4624,\"ITMiscStatus\"=0,\"StateOfCharge\"=100,\"Ra09\"=0,\"GaugeFlagRaw\"=224,\"CycleCount\"=2,\"Voltage\"=12939,\"SystemPower\"=1091238263,\"LifetimeData\"={\"Raw\"=<016d9b49000028a10000000000000000016dc3ea0000c7e440120000000000000029000f10ed0de132c129ba24bce07e2d5fdafbe07edafb00ee0001a0280001>,\"UpdateTime\"=1676429353,\"ResistanceUpdatedDisabledCount\"=0,\"CycleCountLastQmax\"=0,\"TimeAtHighSoc\"=<00000000610000002600000000000000000000000000000000000000000000000300000000000000000000000000000000000000000000000000000067000000c10000000000000000000000000000000000000000000000171700003c01000002000000000000000000000000000000>,\"TemperatureSamples\"=106536,\"TotalOperatingTime\"=6658,\"MaximumDischargeCurrent\"=18446744073709543550,\"MinimumPackVoltage\"=10682,\"MaximumPackVoltage\"=12993,\"MaximumChargeCurrent\"=9404,\"AverageTemperature\"=18446744073709551598,\"MinimumTemperature\"=15,\"RDISCnt\"=0,\"MaximumTemperature\"=41},\"Ra02\"=0}"; 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