InputElement:
  WhiteSpace
  Comment
  Token

Token:
  Identifier
  Keyword
  Literal
  Separator
  Operator

Comment:
  TraditionalComment
  EndOfLineComment

TraditionalComment:
  / * CommentTail

CommentTail:
  * CommentTailStar
  NotStar CommentTail

CommentTailStar:
  /
  * CommentTailStar
  NotStarNotSlash CommentTail

NotStar:
  InputCharacter but not *
  LineTerminator

NotStarNotSlash:
  InputCharacter but not * or /
  LineTerminator

EndOfLineComment:
  / / {InputCharacter}

Identifier:
  IdentifierChars but not a ReservedKeyword or BooleanLiteral or NullLiteral

IdentifierChars:
  JavaLetter {JavaLetterOrDigit}

Keyword:
  ReservedKeyword
  ContextualKeyword

ReservedKeyword:
  abstract
  assert
  boolean
  break
  byte
  case
  catch
  char
  class
  const
  continue
  default
  do
  double
  else
  enum
  extends
  final
  finally
  float
  for
  goto
  if
  implements
  import
  instanceof
  int
  interface
  long
  native
  new
  package
  private
  protected
  public
  return
  short
  static
  strictfp
  super
  switch
  synchronized
  this
  throw
  throws
  transient
  try
  void
  volatile
  while
  _

ContextualKeyword:
  exports
  module
  non-sealed
  open
  opens
  permits
  provides
  record
  requires
  sealed
  to
  transitive
  uses
  var
  when
  with
  yield

Literal:
  IntegerLiteral
  FloatingPointLiteral
  BooleanLiteral
  CharacterLiteral
  StringLiteral
  TextBlock
  NullLiteral

IntegerLiteral:
  DecimalIntegerLiteral
  HexIntegerLiteral
  OctalIntegerLiteral
  BinaryIntegerLiteral

DecimalIntegerLiteral:
  DecimalNumeral [IntegerTypeSuffix]

HexIntegerLiteral:
  HexNumeral [IntegerTypeSuffix]

OctalIntegerLiteral:
  OctalNumeral [IntegerTypeSuffix]

BinaryIntegerLiteral:
  BinaryNumeral [IntegerTypeSuffix]

IntegerTypeSuffix:
  l
  L

DecimalNumeral:
  0
  NonZeroDigit [Digits]
  NonZeroDigit Underscores Digits

NonZeroDigit:
  1
  2
  3
  4
  5
  6
  7
  8
  9

Digits:
  Digit
  Digit [DigitsAndUnderscores] Digit

Digit:
  0
  NonZeroDigit

DigitsAndUnderscores:
  DigitOrUnderscore {DigitOrUnderscore}

DigitOrUnderscore:
  Digit
  _

Underscores:
  _ {_}

HexNumeral:
  0 x HexDigits
  0 X HexDigits

HexDigits:
  HexDigit
  HexDigit [HexDigitsAndUnderscores] HexDigit

HexDigit:
  0
  1
  2
  3
  4
  5
  6
  7
  8
  9
  a
  b
  c
  d
  e
  f
  A
  B
  C
  D
  E
  F

HexDigitsAndUnderscores:
  HexDigitOrUnderscore {HexDigitOrUnderscore}

HexDigitOrUnderscore:
  HexDigit
  _

OctalNumeral:
  0 OctalDigits
  0 Underscores OctalDigits

OctalDigits:
  OctalDigit
  OctalDigit [OctalDigitsAndUnderscores] OctalDigit

OctalDigit:
  0
  1
  2
  3
  4
  5
  6
  7

OctalDigitsAndUnderscores:
  OctalDigitOrUnderscore {OctalDigitOrUnderscore}

OctalDigitOrUnderscore:
  OctalDigit
  _

BinaryNumeral:
  0 b BinaryDigits
  0 B BinaryDigits

BinaryDigits:
  BinaryDigit
  BinaryDigit [BinaryDigitsAndUnderscores] BinaryDigit

BinaryDigit:
  0
  1

BinaryDigitsAndUnderscores:
  BinaryDigitOrUnderscore {BinaryDigitOrUnderscore}

BinaryDigitOrUnderscore:
  BinaryDigit
  _

FloatingPointLiteral:
  DecimalFloatingPointLiteral
  HexadecimalFloatingPointLiteral

DecimalFloatingPointLiteral:
  Digits . [Digits] [ExponentPart] [FloatTypeSuffix]
  . Digits [ExponentPart] [FloatTypeSuffix]
  Digits ExponentPart [FloatTypeSuffix]
  Digits [ExponentPart] FloatTypeSuffix

ExponentPart:
  ExponentIndicator SignedInteger

ExponentIndicator:
  e
  E

SignedInteger:
  [Sign] Digits

Sign:
  +
  -

FloatTypeSuffix:
  f
  F
  d
  D

HexadecimalFloatingPointLiteral:
  HexSignificand BinaryExponent [FloatTypeSuffix]

HexSignificand:
  HexNumeral [.]
  0 x [HexDigits] . HexDigits
  0 X [HexDigits] . HexDigits

BinaryExponent:
  BinaryExponentIndicator SignedInteger

BinaryExponentIndicator:
  p
  P

BooleanLiteral:
  true
  false

CharacterLiteral:
  ' SingleCharacter '
  ' EscapeSequence '

SingleCharacter:
  InputCharacter but not ' or \

StringLiteral:
  " {StringCharacter} "

StringCharacter:
  InputCharacter but not " or \
  EscapeSequence

TextBlock:
  " " " {TextBlockWhiteSpace} LineTerminator {TextBlockCharacter} " " "

TextBlockWhiteSpace:
  WhiteSpace but not LineTerminator

TextBlockCharacter:
  InputCharacter but not \
  EscapeSequence
  LineTerminator

EscapeSequence:
  \ b
  \ s
  \ t
  \ n
  \ f
  \ r
  \ LineTerminator
  \ "
  \ '
  \ \
  OctalEscape

OctalEscape:
  \ OctalDigit
  \ OctalDigit OctalDigit
  \ ZeroToThree OctalDigit OctalDigit

ZeroToThree:
  0
  1
  2
  3

NullLiteral:
  null

Separator:
  (
  )
  {
  }
  [
  ]
  ;
  ,
  .
  ...
  @
  ::

Operator:
  =
  >
  <
  !
  ~
  ?
  :
  ->
  ==
  >=
  <=
  !=
  &&
  ||
  ++
  --
  +
  -
  *
  /
  &
  |
  ^
  %
  <<
  >>
  >>>
  +=
  -=
  *=
  /=
  &=
  |=
  ^=
  %=
  <<=
  >>=
  >>>=