runtime(java): Improve the recognition of the "style" method declarations

Commit: 
https://github.com/vim/vim/commit/a4c085a3e607bd01d34e1db600b6460fc35fb0a3
Author: Aliaksei Budavei <0x000...@gmail.com>
Date:   Wed Apr 24 21:04:25 2024 +0200

    runtime(java): Improve the recognition of the "style" method declarations
    
    - Request the new regexp engine (v7.3.970) for [:upper:] and
      [:lower:].
    
    - Recognise declarations of in-line annotated methods.
    
    - Recognise declarations of _strictfp_ methods.
    
    - Establish partial order for method modifiers as shown in
      the MethodModifier production; namely, _public_ and
      friends should be written the leftmost, possibly followed
      by _abstract_ or _default_, or possibly followed by other
      modifiers.
    
    - Stop looking for parameterisable primitive types (void<?>,
      int<Object>, etc., are malformed).
    
    - Stop looking for arrays of _void_.
    
    - Acknowledge the prevailing convention for method names to
      begin with a small letter and for class/interface names to
      begin with a capital letter; and, therefore, desist from
      claiming declarations of enum constants and constructors
      with javaFuncDef.
      Rationale:
        + Constructor is distinct from method:
          * its (overloaded) name is not arbitrary;
          * its return type is implicit;
          * its _throws_ clause depends on indirect vagaries of
            instance (variable) initialisers;
          * its invocation makes other constructors of its type
            hierarchy invoked one by one, concluding with the
            primordial constructor;
          * its explicit invocation, via _this_ or _super_, can
            only appear as the first statement in a constructor
            (not anymore, see JEP 447); else, its _super_ call
            cannot appear in constructors of _record_ or _enum_;
            and neither invocation is allowed for the primordial
            constructor;
          * it is not a member of its class, like initialisers,
            and is never inherited;
          * it is never _abstract_ or _native_.
        + Constructor declarations tend to be few in number and
          merit visual recognition from method declarations.
        + Enum constants define a fixed set of type instances
          and more resemble class variable initialisers.
    
    Note that the code duplicated for @javaFuncParams is written
    keeping in mind for g:java_highlight_functions a pending 3rd
    variant, which would require none of the :syn-cluster added
    groups.
    
    closes: #14620
    
    Signed-off-by: Aliaksei Budavei <0x000...@gmail.com>
    Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/syntax/java.vim b/runtime/syntax/java.vim
index e85174e7b..8ffe9e062 100644
--- a/runtime/syntax/java.vim
+++ b/runtime/syntax/java.vim
@@ -3,7 +3,7 @@
 " Maintainer:          Aliaksei Budavei <0x000c70 AT gmail DOT com>
 " Former Maintainer:   Claudio Fleiner <clau...@fleiner.com>
 " Repository:          https://github.com/zzzyxwvut/java-vim.git
-" Last Change:         2024 Apr 13
+" Last Change:         2024 Apr 22
 
 " Please check :help java.vim for comments on some of the options available.
 
@@ -82,7 +82,8 @@ syn match   javaConceptKind   
"\<default\>\%(\s*\%(:\|->\)\)\@!"
 " ".java\=" extension used for a production version and an arbitrary
 " extension used for a testing version.
 let s:module_info_cur_buf = fnamemodify(bufname("%"), ":t") =~ 
'^module-info\%(\.class\>\)\@!'
-lockvar s:module_info_cur_buf
+let s:selectable_regexp_engine = !(v:version < 704)
+lockvar s:selectable_regexp_engine s:module_info_cur_buf
 
 " Java modules (since Java 9, for "module-info.java" file).
 if s:module_info_cur_buf
@@ -287,24 +288,29 @@ syn match   javaSpecial "\u\x\x\x\x"
 
 syn cluster javaTop 
add=javaString,javaStrTempl,javaCharacter,javaNumber,javaSpecial,javaStringError,javaTextBlockError
 
+" Method declarations (JLS-17, §8.4.3, §8.4.4, §9.4).
 if exists("java_highlight_functions")
+  syn cluster javaFuncParams 
contains=javaAnnotation,@javaClasses,javaType,javaVarArg,javaComment,javaLineComment
+
   if java_highlight_functions == "indent"
-    syn match javaFuncDef "^\%(        \|  \%( \{6\}\)\=\)\K\%(\k\|[ 
.,<>\[\]]\)*([^-+*/]*)" 
contains=javaScopeDecl,javaConceptKind,javaType,javaStorageClass,@javaClasses,javaAnnotation
-    syn region javaFuncDef start=+^\%( \|  \%( \{6\}\)\=\)\K\%(\k\|[ 
.,<>\[\]]\)*([^-+*/]*,\s*+ end=+)+ 
contains=javaScopeDecl,javaConceptKind,javaType,javaStorageClass,@javaClasses,javaAnnotation
+    syn cluster javaFuncParams 
add=javaScopeDecl,javaConceptKind,javaStorageClass,javaExternal
+    syn match javaFuncDef "^\%(        \|  \%( \{6\}\)\=\)\K\%(\k\|[ 
.,<>\[\]]\)*([^-+*/]*)" contains=@javaFuncParams
+    syn region javaFuncDef start=+^\%( \|  \%( \{6\}\)\=\)\K\%(\k\|[ 
.,<>\[\]]\)*([^-+*/]*,\s*+ end=+)+ contains=@javaFuncParams
   else
     " This is the "style" variant (:help ft-java-syntax).
-    "
-    " Match arbitrarily indented method and constructor declarations
-    " and some enum constants.
-    "
-    " TODO: Come back to refine and fix the parts of javaFuncDef.
-    " TODO: Request the new regexp engine for [:upper:] and [:lower:].
-    "
-    " XXX: \C\<[^a-z0-9]\k*\> rejects "type", but matches "τύπος".
-    " XXX: \C\<[^A-Z0-9]\k*\> rejects "Method", but matches "Μέθοδος".
-    "
-    " Match: [abstract] [<α, β>] [Τʬ][<γ>][[][]] [μΜ]ʭʭ(/* ... */);
-    syn region javaFuncDef 
start=+^\s\+\%(\%(public\|protected\|private\|static\|\%(abstract\|default\)\|final\|native\|synchronized\)\s\+\)*\%(<.*>\s\+\)\=\%(\%(void\|boolean\|char\|byte\|short\|int\|long\|float\|double\|\%(\K\k*\.\)*\<[^a-z0-9]\k*\>\)\%(<[^(){}]*>\)\=\%(\[\]\)*\s\+\<[^A-Z0-9]\k*\>\|\<[^a-z0-9]\k*\>\)\s*(+
 end=+)+ 
contains=javaScopeDecl,javaConceptKind,javaType,javaStorageClass,javaComment,javaLineComment,@javaClasses,javaAnnotation
+    syn cluster javaFuncParams 
add=javaScopeDecl,javaConceptKind,javaStorageClass,javaExternal
+
+    " Match arbitrarily indented camelCasedName method declarations.
+    " Match: [@ɐ] [abstract] [<α, β>] Τʬ[<γ>][[][]] μʭʭ(/* ... */);
+
+    if s:selectable_regexp_engine
+      " Request the new regexp engine for [:upper:] and [:lower:].
+      syn region javaFuncDef 
start=/\%#=2^\s\+\%(\%(@\%(\K\k*\.\)*\K\k*\>\)\s\+\)*\%(p\%(ublic\|rotected\|rivate\)\s\+\)\=\%(\%(abstract\|default\)\s\+\|\%(\%(final\|\%(native\|strictfp\)\|s\%(tatic\|ynchronized\)\)\s\+\)*\)\=\%(<.*[[:space:]-]\@1<!>\s\+\)\=\%(void\|\%(b\%(oolean\|yte\)\|char\|short\|int\|long\|float\|double\|\%(\<\K\k*\>\.\)*\<[$_[:upper:]]\k*\>\%(<[^(){}]*[[:space:]-]\@1<!>\)\=\)\%(\[\]\)*\)\s\+\<[$_[:lower:]]\k*\>\s*(/
 end=/)/ skip=/\/\*.\{-}\*\/\|\/\/.*$/ contains=@javaFuncParams
+    else
+      " XXX: \C\<[^a-z0-9]\k*\> rejects "type", but matches "τύπος".
+      " XXX: \C\<[^A-Z0-9]\k*\> rejects "Method", but matches "Μέθοδος".
+      syn region javaFuncDef 
start=/^\s\+\%(\%(@\%(\K\k*\.\)*\K\k*\>\)\s\+\)*\%(p\%(ublic\|rotected\|rivate\)\s\+\)\=\%(\%(abstract\|default\)\s\+\|\%(\%(final\|\%(native\|strictfp\)\|s\%(tatic\|ynchronized\)\)\s\+\)*\)\=\%(<.*[[:space:]-]\@1<!>\s\+\)\=\%(void\|\%(b\%(oolean\|yte\)\|char\|short\|int\|long\|float\|double\|\%(\<\K\k*\>\.\)*\<[^a-z0-9]\k*\>\%(<[^(){}]*[[:space:]-]\@1<!>\)\=\)\%(\[\]\)*\)\s\+\<[^A-Z0-9]\k*\>\s*(/
 end=/)/ skip=/\/\*.\{-}\*\/\|\/\/.*$/ contains=@javaFuncParams
+    endif
   endif
 
   syn match   javaLambdaDef "\<\K\k*\>\%(\<default\>\)\@<!\s*->"
@@ -476,6 +482,6 @@ endif
 
 let b:spell_options = "contained"
 let &cpo = s:cpo_save
-unlet s:module_info_cur_buf s:cpo_save
+unlet s:selectable_regexp_engine s:module_info_cur_buf s:cpo_save
 
 " vim: ts=8
diff --git a/runtime/syntax/testdir/dumps/java_methods_indent_00.dump 
b/runtime/syntax/testdir/dumps/java_methods_indent_00.dump
new file mode 100644
index 000000000..8f90e9106
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_indent_00.dump
@@ -0,0 +1,20 @@
+>/+0#0000e05#ffffff0@1| |V|I|M|_|T|E|S|T|_|S|E|T|U|P| |l|e|t| 
|g|:|j|a|v|a|_|h|i|g|h|l|i|g|h|t|_|f|u|n|c|t|i|o|n|s| |=| |'|i|n|d|e|n|t|'| 
+0#0000000&@15
+@75
+@75
+|i+0#e000e06&|m|p|o|r|t| 
+0#0000000&|j|a|v|a|.|l|a|n|g|.|a|n@1|o|t|a|t|i|o|n|.|T|a|r|g|e|t|;| @39
+@75
+|a+0#4040ff13&|b|s|t|r|a|c|t| +0#0000000&|c+0#00e0003&|l|a|s@1| 
+0#0000000&|I|n|d|e|n|t|M|e|t|h|o|d|s|T|e|s|t|s| @41
+|{+0#00e0e07&| +0#0000000&|/+0#0000e05&@1| |D|O| |N|O|T| |r|e|t|a|b|!| 
|T|H|I|S| |F|I|L|E|;| |R|E|M|E|M|B|E|R| |A|B|O|U|T| 
|t|e|s|t|d|i|r|/|f|t|p|l|u|g|i|n|.| +0#0000000&@12
+| +0#00e0e07&@1|p+0#00e0003&|r|o|t|e|c|t|e|d| 
+0#00e0e07&|I|n|d|e|n|t|M|e|t|h|o|d|s|T|e|s|t|s|(|)| +0#0000000&|{+0#00e0e07&| 
+0#0000000&|}+0#00e0e07&| +0#0000000&@38
+@75
+| +0#00e0e07&@1|r|e|c|o|r|d| |Τ|ʬ|<|α|>|(|α| |a|)| +0#0000000&|{+0#00e0e07&| 
+0#0000000&|}+0#00e0e07&| +0#0000000&@51
+@75
+@2|e+0#00e0003&|n|u|m| +0#0000000&|𝓔| @66
+@2|{+0#00e0e07&| +0#0000000&@71
+| +0#00e0e07&@7|A|(|"|𝕬|"|)|,| |B|(|"|𝕭|"|)|,| |C|(|"|𝕮|"|)|,| |D|(|"|𝕯|"|)|,| 
+0#0000000&@35
+| +0#00e0e07&@7|E|(|"|𝕰|"|)|,+0#0000000&| 
|F|(|"+0#e000002&|𝕱|"|)+0#0000000&|,| |G|(|"+0#e000002&|𝕲|"|)+0#0000000&|,| 
|H|(|"+0#e000002&|𝕳|"|)+0#0000000&|;| @35
+@8|f+0#4040ff13&|i|n|a|l| +0#0000000&|S|t|r|i|n|g| |𝐬|;| @51
+@8|p+0#00e0003&|r|i|v|a|t|e| +0#0000000&|𝓔|(|S|t|r|i|n|g| |𝐬|)| |{+0#00e0e07&| 
+0#0000000&|t+0#00e0003&|h|i|s|.+0#0000000&|𝐬| |=| |𝐬|;| |}+0#00e0e07&| 
+0#0000000&@31
+@2|}+0#00e0e07&| +0#0000000&@71
+@75
+@57|1|,|1| @10|T|o|p| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_indent_01.dump 
b/runtime/syntax/testdir/dumps/java_methods_indent_01.dump
new file mode 100644
index 000000000..44066c39d
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_indent_01.dump
@@ -0,0 +1,20 @@
+| +0#00e0e07#ffffff0@7|A|(|"|𝕬|"|)|,| |B|(|"|𝕭|"|)|,| |C|(|"|𝕮|"|)|,| 
|D|(|"|𝕯|"|)|,| +0#0000000&@35
+| +0#00e0e07&@7|E|(|"|𝕰|"|)|,+0#0000000&| 
|F|(|"+0#e000002&|𝕱|"|)+0#0000000&|,| |G|(|"+0#e000002&|𝕲|"|)+0#0000000&|,| 
|H|(|"+0#e000002&|𝕳|"|)+0#0000000&|;| @35
+@8|f+0#4040ff13&|i|n|a|l| +0#0000000&|S|t|r|i|n|g| |𝐬|;| @51
+@8|p+0#00e0003&|r|i|v|a|t|e| +0#0000000&|𝓔|(|S|t|r|i|n|g| |𝐬|)| |{+0#00e0e07&| 
+0#0000000&|t+0#00e0003&|h|i|s|.+0#0000000&|𝐬| |=| |𝐬|;| |}+0#00e0e07&| 
+0#0000000&@31
+@2|}+0#00e0e07&| +0#0000000&@71
+> @74
+@2|@+0#e000e06&|T|a|r|g|e|t|(+0#0000000&|j|a|v|a|.|l|a|n|g|.|a|n@1|o|t|a|t|i|o|n|.|E|l|e|m|e|n|t|T|y|p|e|.|M|E|T|H|O|D|)|
 @24
+@2|@+0#e000e06&|j|a|v|a|.|l|a|n|g|.|a|n@1|o|t|a|t|i|o|n|.|R|e|p|e|a|t|a|b|l|e|(+0#0000000&|T|ɐ|g@1|a|b|l|ɘ|s|.|c+0#00e0003&|l|a|s@1|)+0#0000000&|
 @23
+@2|@+0#00e0003&|i|n|t|e|r|f|a|c|e| +0#0000000&|T|ɐ|g@1|a|b|l|ɘ| @53
+@2|{+0#00e0e07&| +0#0000000&@71
+| +0#00e0e07&@7|S|t|r|i|n|g|[|]| |v|a|l|u|e|(|)| 
+0#0000000&|d+0#4040ff13&|e|f|a|u|l|t| +0#0000000&|"+0#e000002&@1|;+0#0000000&| 
@38
+@2|}+0#00e0e07&| +0#0000000&@71
+@75
+@2|@+0#e000e06&|T|a|r|g|e|t|(+0#0000000&|j|a|v|a|.|l|a|n|g|.|a|n@1|o|t|a|t|i|o|n|.|E|l|e|m|e|n|t|T|y|p|e|.|M|E|T|H|O|D|)|
 @24
+@2|@+0#00e0003&|i|n|t|e|r|f|a|c|e| +0#0000000&|T|ɐ|g@1|a|b|l|ɘ|s| @52
+@2|{+0#00e0e07&| +0#0000000&@71
+| +0#00e0e07&@7|T|ɐ|g@1|a|b|l|ɘ|[|]| |v|a|l|u|e|(|)|;+0#0000000&| @47
+@2|}+0#00e0e07&| +0#0000000&@71
+@75
+@57|1|9|,|0|-|1| @7|2|5|%| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_indent_02.dump 
b/runtime/syntax/testdir/dumps/java_methods_indent_02.dump
new file mode 100644
index 000000000..2ab65832f
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_indent_02.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@74
+@2|i+0#00e0003&|n|t|e|r|f|a|c|e| +0#0000000&|S|t|y|l|a|b|l|e|<|Α|>| @51
+@2|{+0#00e0e07&| +0#0000000&@71
+| +0#00e0e07&@7|d+0#4040ff13&|e|f|a|u|l|t| +0#00e0e07&|v+0#00e0003&|o|i|d| 
+0#00e0e07&|a|s|c|i@1|$|0|_|(|)| +0#0000000&|{+0#00e0e07&| 
+0#0000000&|}+0#00e0e07&| +0#0000000&@39
+| +0#00e0e07&@7|d+0#4040ff13&|e|f|a|u|l|t| +0#00e0e07&|Α| |μ|ʭ@1|$|0|_|(|)| 
+0#0000000&|{+0#00e0e07&| +0#0000000&|r+0#af5f00255&|e|t|u|r|n| 
+0#0000000&|n+0#e000002&|u|l@1|;+0#0000000&| |}+0#00e0e07&| +0#0000000&@31
+@2>}+0#00e0e07&| +0#0000000&@71
+@75
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+0#0000000&@53
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+0#00e0e07&|a|s|c|i@1|$|0|_|(|)|;+0#0000000&| @47
+@75
+@2|@+0#e000e06&|T|ɐ|g@1|a|b|l|ɘ| +0#0000000&|@+0#e000e06&|T|ɐ|g@1|a|b|l|ɘ| 
+0#0000000&@53
+| +0#00e0e07&@1|a+0#4040ff13&|b|s|t|r|a|c|t| +0#00e0e07&|<|α|,| |β|>| 
|Τ|ʬ|<|α|>| |μ|ʭ@1|$|0|_|(|β| |𝛽|)|;+0#0000000&| @38
+@75
+@2|@+0#e000e06&|T|ɐ|g@1|a|b|l|ɘ| +0#0000000&@63
+| +0#00e0e07&@1|p+0#00e0003&|r|i|v|a|t|e| +0#00e0e07&|n+0#e000e06&|a|t|i|v|e| 
+0#00e0e07&|v+0#00e0003&|o|i|d| +0#00e0e07&|a|s|c|i@1|$|1|_|(|)|;+0#0000000&| 
@41
+@75
+@2|@+0#e000e06&|T|ɐ|g@1|a|b|l|ɘ| +0#0000000&@63
+@2|p+0#00e0003&|r|i|v|a|t|e| +0#0000000&|n+0#e000e06&|a|t|i|v|e| 
+0#0000000&|<|α|,| |β|>| |Τ|ʬ|<|α|>|[|]| |μ|ʭ@1|$|1|_|(| @35
+@24|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|<|β|,| 
|Τ|ʬ|<|α|>|[|]|>| |ƒ|)|;| @7
+@57|3|7|,|3| @9|6|0|%| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_indent_03.dump 
b/runtime/syntax/testdir/dumps/java_methods_indent_03.dump
new file mode 100644
index 000000000..2ce2bba44
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_indent_03.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@23|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|<|β|,| 
|Τ|ʬ|<|α|>|[|]|>| |ƒ|)|;| @7
+@75
+| +0#00e0e07&@1|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|f+0#4040ff13&|i|n|a|l| 
+0#00e0e07&|n+0#e000e06&|a|t|i|v|e| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| +0#00e0e07&|v+0#00e0003&|o|i|d| 
+0#00e0e07&|a|s|c|i@1|$|9|8|_|(|)|;+0#0000000&| @22
+@2|s+0#00e0003&|t|a|t|i|c| +0#0000000&|f+0#4040ff13&|i|n|a|l| 
+0#0000000&|n+0#e000e06&|a|t|i|v|e| 
+0#0000000&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| +0#0000000&|<|α|,| |β|>| 
|Τ|ʬ|<|α|>|[|]|[|]| |μ|ʭ@1|$|9|8|_|(| @14
+@24|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|<|β|,| 
|Τ|ʬ|<|α|>|[|]|[|]|>| |ƒ|)|;| @5
+> @74
+@2|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|s|t|r|i|c|t|f|p|"|)+0#0000000&|
 @43
+| +0#00e0e07&@1|p+0#00e0003&|r|o|t|e|c|t|e|d| 
+0#00e0e07&|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|f+0#4040ff13&|i|n|a|l| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| 
+0#00e0e07&|s+0#00e0003&|t|r|i|c|t|f|p| +0#00e0e07&|v+0#00e0003&|o|i|d| 
+0#00e0e07&|a|s|c|i@1|$|9@1|_|(|)| +0#0000000&@11
+@2|{+0#00e0e07&| +0#0000000&|a|s|c|i@1|$|9|8|_|(|)|;| |}+0#00e0e07&| 
+0#0000000&@56
+@75
+@2|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|s|t|r|i|c|t|f|p|"|)+0#0000000&|
 @43
+@2|p+0#00e0003&|r|o|t|e|c|t|e|d| +0#0000000&|s+0#00e0003&|t|a|t|i|c| 
+0#0000000&|f+0#4040ff13&|i|n|a|l| 
+0#0000000&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| 
+0#0000000&|s+0#00e0003&|t|r|i|c|t|f|p| +0#0000000&|<|α|,| |β|>| 
|Τ|ʬ|<|α|>|[|]| |μ|ʭ@1|$|9@1|_|(| @4
+@24|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|<|β|,| 
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+@2|{+0#00e0e07&| +0#0000000&@71
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+| +0#00e0e07&@7|I|n|d|e|n|t|M|e|t|h|o|d|s|T|e|s|t|s|.|<|α|,| 
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+@2|}+0#00e0e07&| +0#0000000&@71
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+0#0000000&|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|c|a|s|t|"|)+0#0000000&|
 @37
+@57|5@1|,|0|-|1| @7|9|6|%| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_indent_99.dump 
b/runtime/syntax/testdir/dumps/java_methods_indent_99.dump
new file mode 100644
index 000000000..36ee838dc
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_indent_99.dump
@@ -0,0 +1,20 @@
+| +0#00e0e07#ffffff0@1|s+0#00e0003&|t|a|t|i|c| 
+0#00e0e07&|f+0#4040ff13&|i|n|a|l| +0#00e0e07&|n+0#e000e06&|a|t|i|v|e| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| +0#00e0e07&|v+0#00e0003&|o|i|d| 
+0#00e0e07&|a|s|c|i@1|$|9|8|_|(|)|;+0#0000000&| @22
+@2|s+0#00e0003&|t|a|t|i|c| +0#0000000&|f+0#4040ff13&|i|n|a|l| 
+0#0000000&|n+0#e000e06&|a|t|i|v|e| 
+0#0000000&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| +0#0000000&|<|α|,| |β|>| 
|Τ|ʬ|<|α|>|[|]|[|]| |μ|ʭ@1|$|9|8|_|(| @14
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 @43
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+0#00e0e07&|a|s|c|i@1|$|9@1|_|(|)| +0#0000000&@11
+@2|{+0#00e0e07&| +0#0000000&|a|s|c|i@1|$|9|8|_|(|)|;| |}+0#00e0e07&| 
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+@2|{+0#00e0e07&| +0#0000000&@71
+@4|r+0#af5f00255&|e|t|u|r|n| +0#0000000&@64
+| +0#00e0e07&@7|I|n|d|e|n|t|M|e|t|h|o|d|s|T|e|s|t|s|.|<|α|,| 
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|}+0#00e0e07&| +0#0000000&@6
+>}+0#00e0e07&| +0#0000000&@73
+@57|7|0|,|1| @9|B|o|t| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_style_00.dump 
b/runtime/syntax/testdir/dumps/java_methods_style_00.dump
new file mode 100644
index 000000000..01d483ca4
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_style_00.dump
@@ -0,0 +1,20 @@
+>/+0#0000e05#ffffff0@1| |V|I|M|_|T|E|S|T|_|S|E|T|U|P| |l|e|t| 
|g|:|j|a|v|a|_|h|i|g|h|l|i|g|h|t|_|f|u|n|c|t|i|o|n|s| |=| |'|s|t|y|l|e|'| 
+0#0000000&@16
+@75
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+0#0000000&|j|a|v|a|.|l|a|n|g|.|a|n@1|o|t|a|t|i|o|n|.|T|a|r|g|e|t|;| @39
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+|a+0#4040ff13&|b|s|t|r|a|c|t| +0#0000000&|c+0#00e0003&|l|a|s@1| 
+0#0000000&|S|t|y|l|e|M|e|t|h|o|d|s|T|e|s|t|s| @42
+|{+0#00e0e07&| +0#0000000&@73
+@4|p+0#00e0003&|r|o|t|e|c|t|e|d| 
+0#0000000&|S|t|y|l|e|M|e|t|h|o|d|s|T|e|s|t|s|(|)| |{+0#00e0e07&| 
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+@8|f+0#4040ff13&|i|n|a|l| +0#0000000&|S|t|r|i|n|g| |𝐬|;| @51
+@8|p+0#00e0003&|r|i|v|a|t|e| +0#0000000&|𝓔|(|S|t|r|i|n|g| |𝐬|)| |{+0#00e0e07&| 
+0#0000000&|t+0#00e0003&|h|i|s|.+0#0000000&|𝐬| |=| |𝐬|;| |}+0#00e0e07&| 
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diff --git a/runtime/syntax/testdir/dumps/java_methods_style_01.dump 
b/runtime/syntax/testdir/dumps/java_methods_style_01.dump
new file mode 100644
index 000000000..c9442080e
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_style_01.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@7|A|(|"+0#e000002&|𝕬|"|)+0#0000000&|,| 
|B|(|"+0#e000002&|𝕭|"|)+0#0000000&|,| |C|(|"+0#e000002&|𝕮|"|)+0#0000000&|,| 
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+@8|f+0#4040ff13&|i|n|a|l| +0#0000000&|S|t|r|i|n|g| |𝐬|;| @51
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+@4|{+0#00e0e07&| +0#0000000&@69
+| +0#00e0e07&@7|S|t|r|i|n|g|[|]| |v|a|l|u|e|(|)| 
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+@4|@+0#00e0003&|i|n|t|e|r|f|a|c|e| +0#0000000&|T|ɐ|g@1|a|b|l|ɘ|s| @50
+@4|{+0#00e0e07&| +0#0000000&@69
+| +0#00e0e07&@7|T|ɐ|g@1|a|b|l|ɘ|[|]| |v|a|l|u|e|(|)|;+0#0000000&| @47
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+@75
+@57|1|9|,|0|-|1| @7|2|7|%| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_style_02.dump 
b/runtime/syntax/testdir/dumps/java_methods_style_02.dump
new file mode 100644
index 000000000..bbdc9bb63
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_style_02.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@74
+@4|i+0#00e0003&|n|t|e|r|f|a|c|e| +0#0000000&|S|t|y|l|a|b|l|e|<|Α|>| @49
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+@4>}+0#00e0e07&| +0#0000000&@69
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+0#00e0e07&|@+0#e000e06&|T|ɐ|g@1|a|b|l|ɘ| 
+0#00e0e07&|a+0#4040ff13&|b|s|t|r|a|c|t| +0#00e0e07&|<|α|,| |β|>| |Τ|ʬ|<|α|>| 
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+0#00e0e07&|<|α|,| |β|>| |Τ|ʬ|<|α|>|[|]| |μ|ʭ@1|$|1|_|(| +0#0000000&@23
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+@57|3|7|,|2|-|5| @7|6|5|%| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_style_03.dump 
b/runtime/syntax/testdir/dumps/java_methods_style_03.dump
new file mode 100644
index 000000000..e8ce44b3d
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_style_03.dump
@@ -0,0 +1,20 @@
+| 
+0#00e0e07#ffffff0@11|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|<|β|,|
 |Τ|ʬ|<|α|>|[|]|[|]|>| |ƒ|)|;+0#0000000&| @17
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 @41
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+0#00e0e07&|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|f+0#4040ff13&|i|n|a|l| 
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+0#00e0e07&|s+0#00e0003&|t|r|i|c|t|f|p| +0#00e0e07&|v+0#00e0003&|o|i|d| 
+0#00e0e07&|a|s|c|i@1|$|9@1|_|(|)| +0#0000000&@9
+@4|{+0#00e0e07&| +0#0000000&|a|s|c|i@1|$|9|8|_|(|)|;| |}+0#00e0e07&| 
+0#0000000&@54
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+@4|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|s|t|r|i|c|t|f|p|"|)+0#0000000&|
 @41
+| +0#00e0e07&@3|p+0#00e0003&|r|o|t|e|c|t|e|d| 
+0#00e0e07&|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|f+0#4040ff13&|i|n|a|l| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| 
+0#00e0e07&|s+0#00e0003&|t|r|i|c|t|f|p| +0#00e0e07&|<|α|,| |β|>| 
|Τ|ʬ|<|α|>|[|]| |μ|ʭ@1|$|9@1|_|(| +0#0000000&@2
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|Τ|ʬ|<|α|>|[|]|[|]|>| |ƒ|)| +0#0000000&@18
+@4|{+0#00e0e07&| +0#0000000&@69
+@8|r+0#af5f00255&|e|t|u|r|n| +0#0000000&@60
+@4|S|t|y|l|e|M|e|t|h|o|d|s|T|e|s|t|s|.|<|α|,| 
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+@4|}+0#00e0e07&| +0#0000000&@69
+@75
+@4|@+0#e000e06&|O|v|e|r@1|i|d|e| 
+0#0000000&|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|c|a|s|t|"|)+0#0000000&|
 @35
+| +0#00e0e07&@3|p+0#00e0003&|u|b|l|i|c| +0#00e0e07&|S|t|r|i|n|g| 
|t|o|S|t|r|i|n|g|(|)| +0#0000000&|{+0#00e0e07&| 
+0#0000000&|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|(|S|t|r|i|n|g|)| 
|"+0#e000002&|S|t|y|l|e|M|e|t|h|o|d|s|T|e|s|t|s|"|;+0#0000000&| |}+0#00e0e07&| 
+0#0000000&@5
+|}+0#00e0e07&| +0#0000000&@73
+|~+0#4040ff13&| @73
+|~| @73
+| +0#0000000&@56|5@1|,|0|-|1| @7|B|o|t| 
diff --git a/runtime/syntax/testdir/dumps/java_methods_style_99.dump 
b/runtime/syntax/testdir/dumps/java_methods_style_99.dump
new file mode 100644
index 000000000..a2e3228d2
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_methods_style_99.dump
@@ -0,0 +1,20 @@
+| +0#00e0e07#ffffff0@3|s+0#00e0003&|t|a|t|i|c| 
+0#00e0e07&|f+0#4040ff13&|i|n|a|l| +0#00e0e07&|n+0#e000e06&|a|t|i|v|e| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| +0#00e0e07&|v+0#00e0003&|o|i|d| 
+0#00e0e07&|a|s|c|i@1|$|9|8|_|(|)|;+0#0000000&| @20
+| +0#00e0e07&@3|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|f+0#4040ff13&|i|n|a|l| 
+0#00e0e07&|n+0#e000e06&|a|t|i|v|e| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| +0#00e0e07&|<|α|,| |β|>| 
|Τ|ʬ|<|α|>|[|]|[|]| |μ|ʭ@1|$|9|8|_|(| +0#0000000&@12
+| +0#00e0e07&@11|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|<|β|,| 
|Τ|ʬ|<|α|>|[|]|[|]|>| |ƒ|)|;+0#0000000&| @17
+@75
+@4|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|s|t|r|i|c|t|f|p|"|)+0#0000000&|
 @41
+| +0#00e0e07&@3|p+0#00e0003&|r|o|t|e|c|t|e|d| 
+0#00e0e07&|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|f+0#4040ff13&|i|n|a|l| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| 
+0#00e0e07&|s+0#00e0003&|t|r|i|c|t|f|p| +0#00e0e07&|v+0#00e0003&|o|i|d| 
+0#00e0e07&|a|s|c|i@1|$|9@1|_|(|)| +0#0000000&@9
+@4|{+0#00e0e07&| +0#0000000&|a|s|c|i@1|$|9|8|_|(|)|;| |}+0#00e0e07&| 
+0#0000000&@54
+@75
+@4|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|s|t|r|i|c|t|f|p|"|)+0#0000000&|
 @41
+| +0#00e0e07&@3|p+0#00e0003&|r|o|t|e|c|t|e|d| 
+0#00e0e07&|s+0#00e0003&|t|a|t|i|c| +0#00e0e07&|f+0#4040ff13&|i|n|a|l| 
+0#00e0e07&|s+0#00e0003&|y|n|c|h|r|o|n|i|z|e|d| 
+0#00e0e07&|s+0#00e0003&|t|r|i|c|t|f|p| +0#00e0e07&|<|α|,| |β|>| 
|Τ|ʬ|<|α|>|[|]| |μ|ʭ@1|$|9@1|_|(| +0#0000000&@2
+| +0#00e0e07&@11|j|a|v|a|.|u|t|i|l|.|f|u|n|c|t|i|o|n|.|F|u|n|c|t|i|o|n|<|β|,| 
|Τ|ʬ|<|α|>|[|]|[|]|>| |ƒ|)| +0#0000000&@18
+@4|{+0#00e0e07&| +0#0000000&@69
+@8|r+0#af5f00255&|e|t|u|r|n| +0#0000000&@60
+@4|S|t|y|l|e|M|e|t|h|o|d|s|T|e|s|t|s|.|<|α|,| 
|β|>|μ|ʭ@1|$|9|8|_|(|ƒ|)|[|0+0#e000002&|]+0#0000000&|;| @32
+@4|}+0#00e0e07&| +0#0000000&@69
+@75
+@4|@+0#e000e06&|O|v|e|r@1|i|d|e| 
+0#0000000&|@+0#e000e06&|S|u|p@1|r|e|s@1|W|a|r|n|i|n|g|s|(+0#0000000&|"+0#e000002&|c|a|s|t|"|)+0#0000000&|
 @35
+| +0#00e0e07&@3|p+0#00e0003&|u|b|l|i|c| +0#00e0e07&|S|t|r|i|n|g| 
|t|o|S|t|r|i|n|g|(|)| +0#0000000&|{+0#00e0e07&| 
+0#0000000&|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|(|S|t|r|i|n|g|)| 
|"+0#e000002&|S|t|y|l|e|M|e|t|h|o|d|s|T|e|s|t|s|"|;+0#0000000&| |}+0#00e0e07&| 
+0#0000000&@5
+>}+0#00e0e07&| +0#0000000&@73
+@57|6@1|,|1| @9|B|o|t| 
diff --git a/runtime/syntax/testdir/input/java_methods_indent.java 
b/runtime/syntax/testdir/input/java_methods_indent.java
new file mode 100644
index 000000000..627eb8bdf
--- /dev/null
+++ b/runtime/syntax/testdir/input/java_methods_indent.java
@@ -0,0 +1,70 @@
+// VIM_TEST_SETUP let g:java_highlight_functions = 'indent'
+
+
+import java.lang.annotation.Target;
+
+abstract class IndentMethodsTests
+{ // DO NOT retab! THIS FILE; REMEMBER ABOUT testdir/ftplugin.
+  protected IndentMethodsTests() { }
+
+  record Τʬ<α>(α a) { }
+
+  enum 𝓔
+  {
+        A("𝕬"), B("𝕭"), C("𝕮"), D("𝕯"),
+        E("𝕰"), F("𝕱"), G("𝕲"), H("𝕳");
+        final String 𝐬;
+        private 𝓔(String 𝐬) { this.𝐬 = 𝐬; }
+  }
+
+  @Target(java.lang.annotation.ElementType.METHOD)
+  @java.lang.annotation.Repeatable(Tɐggablɘs.class)
+  @interface Tɐggablɘ
+  {
+        String[] value() default "";
+  }
+
+  @Target(java.lang.annotation.ElementType.METHOD)
+  @interface Tɐggablɘs
+  {
+        Tɐggablɘ[] value();
+  }
+
+  interface Stylable<Α>
+  {
+        default void ascii$0_() { }
+        default Α μʭʭ$0_() { return null; }
+  }
+
+  @Tɐggablɘ @Tɐggablɘ
+  abstract void ascii$0_();
+
+  @Tɐggablɘ @Tɐggablɘ
+  abstract <α, β> Τʬ<α> μʭʭ$0_(β 𝛽);
+
+  @Tɐggablɘ
+  private native void ascii$1_();
+
+  @Tɐggablɘ
+  private native <α, β> Τʬ<α>[] μʭʭ$1_(
+                        java.util.function.Function<β, Τʬ<α>[]> ƒ);
+
+  static final native synchronized void ascii$98_();
+  static final native synchronized <α, β> Τʬ<α>[][] μʭʭ$98_(
+                        java.util.function.Function<β, Τʬ<α>[][]> ƒ);
+
+  @SuppressWarnings("strictfp")
+  protected static final synchronized strictfp void ascii$99_()
+  { ascii$98_(); }
+
+  @SuppressWarnings("strictfp")
+  protected static final synchronized strictfp <α, β> Τʬ<α>[] μʭʭ$99_(
+                        java.util.function.Function<β, Τʬ<α>[][]> ƒ)
+  {
+    return
+        IndentMethodsTests.<α, β>μʭʭ$98_(ƒ)[0];
+  }
+
+  @Override @SuppressWarnings("cast")
+  public String toString() { return (String) "IndentMethodsTests"; }
+}
diff --git a/runtime/syntax/testdir/input/java_methods_style.java 
b/runtime/syntax/testdir/input/java_methods_style.java
new file mode 100644
index 000000000..b3e36fb61
--- /dev/null
+++ b/runtime/syntax/testdir/input/java_methods_style.java
@@ -0,0 +1,66 @@
+// VIM_TEST_SETUP let g:java_highlight_functions = 'style'
+
+
+import java.lang.annotation.Target;
+
+abstract class StyleMethodsTests
+{
+       protected StyleMethodsTests() { }
+
+       record Τʬ<α>(α a) { }
+
+       enum 𝓔
+       {
+               A("𝕬"), B("𝕭"), C("𝕮"), D("𝕯"),
+               E("𝕰"), F("𝕱"), G("𝕲"), H("𝕳");
+               final String 𝐬;
+               private 𝓔(String 𝐬) { this.𝐬 = 𝐬; }
+       }
+
+       @Target(java.lang.annotation.ElementType.METHOD)
+       @java.lang.annotation.Repeatable(Tɐggablɘs.class)
+       @interface Tɐggablɘ
+       {
+               String[] value() default "";
+       }
+
+       @Target(java.lang.annotation.ElementType.METHOD)
+       @interface Tɐggablɘs
+       {
+               Tɐggablɘ[] value();
+       }
+
+       interface Stylable<Α>
+       {
+               default void ascii$0_() { }
+               default Α μʭʭ$0_() { return null; }
+       }
+
+       @Tɐggablɘ @Tɐggablɘ abstract void ascii$0_(////////////////
+                                                               );
+       @Tɐggablɘ @Tɐggablɘ abstract <α, β> Τʬ<α> μʭʭ$0_(
+                       /* TODO: @SuppressWarnings("bespoke")*/ β 𝛽);
+
+       @Tɐggablɘ private native void ascii$1_(/*////////////*/);
+       @Tɐggablɘ private native <α, β> Τʬ<α>[] μʭʭ$1_(
+                       java.util.function.Function<β, Τʬ<α>[]> ƒ);
+
+       static final native synchronized void ascii$98_();
+       static final native synchronized <α, β> Τʬ<α>[][] μʭʭ$98_(
+                       java.util.function.Function<β, Τʬ<α>[][]> ƒ);
+
+       @SuppressWarnings("strictfp")
+       protected static final synchronized strictfp void ascii$99_()
+       { ascii$98_(); }
+
+       @SuppressWarnings("strictfp")
+       protected static final synchronized strictfp <α, β> Τʬ<α>[] μʭʭ$99_(
+                       java.util.function.Function<β, Τʬ<α>[][]> ƒ)
+       {
+               return
+       StyleMethodsTests.<α, β>μʭʭ$98_(ƒ)[0];
+       }
+
+       @Override @SuppressWarnings("cast")
+       public String toString() { return (String) "StyleMethodsTests"; }
+}

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