helix/runtime/queries/java/highlights.scm

(identifier) @variable

; Methods

(method_declaration
  name: (identifier) @function.method)
(method_invocation
  name: (identifier) @function.method)
(super) @variable.builtin

; Annotations

(annotation
  name: (identifier) @attribute)
(marker_annotation
  name: (identifier) @attribute)

; Types

(interface_declaration
  name: (identifier) @type)
(class_declaration
  name: (identifier) @type)
(record_declaration
  name: (identifier) @type)
(enum_declaration
  name: (identifier) @type)

((field_access
  object: (identifier) @type)
 (#match? @type "^[A-Z]"))
((scoped_identifier
  scope: (identifier) @type)
 (#match? @type "^[A-Z]"))

(constructor_declaration
  name: (identifier) @type)
(compact_constructor_declaration
  name: (identifier) @type)

(type_identifier) @type

[
  (boolean_type)
  (integral_type)
  (floating_point_type)
  (floating_point_type)
  (void_type)
] @type.builtin

(type_arguments
  (wildcard "?" @type.builtin))

; Patterns (Java 21+): the record type name would otherwise be a @variable.
(record_pattern . (identifier) @type)
; `when` is contextual — only a guard inside a switch label, never a keyword
; elsewhere — so scope it to the guard rather than the flat keyword list.
(guard "when" @keyword.control.conditional)

; Member access. `field_access` is a distinct node from `method_invocation`, so
; this leaves method calls alone; placed before the SCREAMING @constant rule
; below so `Type.CONST` stays a constant.
(field_access
  field: (identifier) @variable.other.member)

; Variables

((identifier) @constant
 (#match? @constant "^_*[A-Z][A-Z\\d_]+$"))

; Unnamed variable / pattern `_` (Java 22) — dim as unused, like the discard in
; other languages. It is an (underscore_pattern) in `var _ = …` and a plain
; identifier in record components / `case _`.
(underscore_pattern) @comment.unused
((identifier) @comment.unused
 (#eq? @comment.unused "_"))

(this) @variable.builtin

; Literals

[
  (hex_integer_literal)
  (decimal_integer_literal)
  (octal_integer_literal)
  (binary_integer_literal)
] @constant.numeric.integer

[
  (decimal_floating_point_literal)
  (hex_floating_point_literal)
] @constant.numeric.float

(character_literal) @constant.character

; `string_literal` now also covers text blocks (`"""…"""`) and its fragments.
(string_literal) @string
(escape_sequence) @constant.character.escape
; Interpolated expressions in string templates (a withdrawn preview) shouldn't
; render as string; reset them rather than colour the whole literal.
(string_interpolation) @none

[
  (true)
  (false)
] @constant.builtin.boolean
(null_literal) @constant.builtin

(line_comment) @comment
(block_comment) @comment

; Punctuation

[
  "::"
  "."
  ";"
  ","
] @punctuation.delimiter

[
  "@"
  "..."
] @punctuation.special

[
  "("
  ")"
  "["
  "]"
  "{"
  "}"
] @punctuation.bracket

(type_arguments
  [
    "<"
    ">"
  ] @punctuation.bracket)

(type_parameters
  [
    "<"
    ">"
  ] @punctuation.bracket)

; Operators

[
  "="
  ">"
  "<"
  "!"
  "~"
  "?"
  ":"
  "->"
  "=="
  ">="
  "<="
  "!="
  "&&"
  "||"
  "++"
  "--"
  "+"
  "-"
  "*"
  "/"
  "&"
  "|"
  "^"
  "%"
  "<<"
  ">>"
  ">>>"
  "+="
  "-="
  "*="
  "/="
  "&="
  "|="
  "^="
  "%="
  "<<="
  ">>="
  ">>>="
] @operator

; Keywords

[
  "abstract"
  "assert"
  "break"
  "case"
  "catch"
  "class"
  "continue"
  "default"
  "do"
  "else"
  "enum"
  "exports"
  "extends"
  "final"
  "finally"
  "if"
  "implements"
  "import"
  "instanceof"
  "interface"
  "module"
  "native"
  "new"
  "non-sealed"
  "open"
  "opens"
  "package"
  "permits"
  "private"
  "protected"
  "provides"
  "public"
  "requires"
  "record"
  "return"
  "sealed"
  "static"
  "strictfp"
  "switch"
  "synchronized"
  "throw"
  "throws"
  "to"
  "transient"
  "transitive"
  "try"
  "uses"
  "volatile"
  "with"
  "yield"
] @keyword

[
  "while"
  "for"
] @keyword.control.repeat