diff --git a/runtime/syntax/java.vim b/runtime/syntax/java.vim
index 800faa4..737219a 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 <claudio@fleiner.com>
 " Repository:		https://github.com/zzzyxwvut/java-vim.git
-" Last Change:		2024 Sep 19
+" Last Change:		2024 Sep 28
 
 " Please check :help java.vim for comments on some of the options available.
 
@@ -156,6 +156,10 @@
   let [s:ff.PeekTo, s:ff.PeekFrom, s:ff.GroupArgs] = repeat([s:ff.RightConstant], 3)
 endif
 
+let s:with_html = !exists("g:java_ignore_html")
+let s:with_markdown = !exists("g:java_ignore_markdown")
+lockvar s:with_html s:with_markdown
+
 " Java module declarations (JLS-17, §7.7).
 "
 " Note that a "module-info" file will be recognised with an arbitrary
@@ -172,7 +176,7 @@
   hi def link javaModuleStmt		Statement
   hi def link javaModuleExternal	Include
 
-  if !exists("g:java_ignore_javadoc") && g:main_syntax != 'jsp'
+  if !exists("g:java_ignore_javadoc") && (s:with_html || s:with_markdown) && g:main_syntax != 'jsp'
     syn match javaDocProvidesTag	contained "@provides\_s\+\S\+" contains=javaDocParam
     syn match javaDocUsesTag		contained "@uses\_s\+\S\+" contains=javaDocParam
     hi def link javaDocProvidesTag	Special
@@ -335,18 +339,52 @@
 exec 'syn region javaCommentMarkupTagAttr contained transparent matchgroup=javaHtmlArg start=/\<\%(re\%(gex\|gion\|placement\)\|substring\|t\%(arget\|ype\)\)\%(\s*=\)\@=/ matchgroup=javaHtmlString end=/\%(=\s*\)\@' . s:ff.Peek('80', '') . '<=\%("[^"]\+"\|' . "\x27[^\x27]\\+\x27" . '\|\%([.-]\|\k\)\+\)/ nextgroup=javaCommentMarkupTagAttr,javaSpaceError skipwhite oneline'
 syn match   javaCommentError contained "/\*"me=e-1 display
 
-if !exists("g:java_ignore_javadoc") && g:main_syntax != 'jsp'
-  " The overridable "html*" default links must be defined _before_ the
-  " inclusion of the same default links from "html.vim".
-  hi def link htmlComment	Special
-  hi def link htmlCommentPart	Special
-  hi def link htmlArg		Type
-  hi def link htmlString	String
+if !exists("g:java_ignore_javadoc") && (s:with_html || s:with_markdown) && g:main_syntax != 'jsp'
+  " The overridable "html*" and "markdown*" default links must be
+  " defined _before_ the inclusion of the same default links from
+  " "html.vim" and "markdown.vim".
+  if s:with_html || s:with_markdown
+    hi def link htmlComment		Special
+    hi def link htmlCommentPart		Special
+    hi def link htmlArg			Type
+    hi def link htmlString		String
+  endif
+
+  if s:with_markdown
+    hi def link markdownCode		Special
+    hi def link markdownCodeBlock	Special
+    hi def link markdownCodeDelimiter	Special
+    hi def link markdownLinkDelimiter	Comment
+  endif
+
   syntax case ignore
 
+  " Note that javaDocSeeTag is valid in HTML and Markdown.
+  let s:ff.WithMarkdown = s:ff.RightConstant
+
   " Include HTML syntax coloring for Javadoc comments.
-  syntax include @javaHtml syntax/html.vim
-  unlet b:current_syntax
+  if s:with_html
+    syntax include @javaHtml syntax/html.vim
+    unlet b:current_syntax
+  endif
+
+  " Include Markdown syntax coloring (v7.2.437) for Javadoc comments.
+  if s:with_markdown
+    try
+      syntax include @javaMarkdown syntax/markdown.vim
+      unlet b:current_syntax
+      let s:ff.WithMarkdown = s:ff.LeftConstant
+    catch /\<E48[45]:/
+      call s:ReportOnce(v:exception)
+      unlockvar s:with_markdown
+      let s:with_markdown = 0
+      lockvar s:with_markdown
+      hi clear markdownCode
+      hi clear markdownCodeBlock
+      hi clear markdownCodeDelimiter
+      hi clear markdownLinkDelimiter
+    endtry
+  endif
 
   " HTML enables spell checking for all text that is not in a syntax
   " item (:syntax spell toplevel); instead, limit spell checking to
@@ -357,10 +395,71 @@
     call s:ReportOnce(v:exception)
   endtry
 
-  syn region javaDocComment	start="/\*\*" end="\*/" keepend contains=javaCommentTitle,@javaHtml,@javaDocTags,javaTodo,javaCommentError,javaSpaceError,@Spell fold
-  exec 'syn region javaCommentTitle contained matchgroup=javaDocComment start="/\*\*" matchgroup=javaCommentTitle end="\.$" end="\.[ \t\r]\@=" end="\%(^\s*\**\s*\)\@' . s:ff.Peek('80', '') . '<=@"me=s-2,he=s-1 end="\*/"me=s-1,he=s-1 contains=@javaHtml,javaCommentStar,javaTodo,javaCommentError,javaSpaceError,@Spell,@javaDocTags'
-  syn region javaCommentTitle	contained matchgroup=javaDocComment start="/\*\*\s*\r\=\n\=\s*\**\s*\%({@return\>\)\@=" matchgroup=javaCommentTitle end="}\%(\s*\.*\)*" contains=@javaHtml,javaCommentStar,javaTodo,javaCommentError,javaSpaceError,@Spell,@javaDocTags,javaTitleSkipBlock
-  syn region javaCommentTitle	contained matchgroup=javaDocComment start="/\*\*\s*\r\=\n\=\s*\**\s*\%({@summary\>\)\@=" matchgroup=javaCommentTitle end="}" contains=@javaHtml,javaCommentStar,javaTodo,javaCommentError,javaSpaceError,@Spell,@javaDocTags,javaTitleSkipBlock
+  if s:with_markdown
+    syn region javaMarkdownComment	start="///" skip="^\s*///.*$" end="^" keepend contains=javaMarkdownCommentTitle,javaMarkdownShortcutLink,@javaMarkdown,@javaDocTags,javaTodo,@Spell nextgroup=javaMarkdownCommentTitle fold
+    syn match javaMarkdownCommentMask	contained "^\s*///"
+    exec 'syn region javaMarkdownCommentTitle contained matchgroup=javaMarkdownComment start="\%(///.*\r\=\n\s*\)\@' . s:ff.Peek('80', '') . '<!///" matchgroup=javaMarkdownCommentTitle end="\.$" end="\.[ \t\r]\@=" end="\n\%(\s*///\s*$\)\@=" end="\%(^\s*///\s*\)\@' . s:ff.Peek('80', '') . '<=@"me=s-2,he=s-1 contains=javaMarkdownShortcutLink,@javaMarkdown,javaMarkdownCommentMask,javaTodo,@Spell,@javaDocTags'
+    exec 'syn region javaMarkdownCommentTitle contained matchgroup=javaMarkdownComment start="\%(///.*\r\=\n\s*\)\@' . s:ff.Peek('80', '') . '<!///\s*\%({@return\>\)\@=" matchgroup=javaMarkdownCommentTitle end="}\%(\s*\.*\)*" contains=javaMarkdownShortcutLink,@javaMarkdown,javaMarkdownCommentMask,javaTodo,@Spell,@javaDocTags,javaTitleSkipBlock'
+    exec 'syn region javaMarkdownCommentTitle contained matchgroup=javaMarkdownComment start="\%(///.*\r\=\n\s*\)\@' . s:ff.Peek('80', '') . '<!///\s*\%({@summary\>\)\@=" matchgroup=javaMarkdownCommentTitle end="}" contains=javaMarkdownShortcutLink,@javaMarkdown,javaMarkdownCommentMask,javaTodo,@Spell,@javaDocTags,javaTitleSkipBlock'
+
+    syn clear markdownId markdownLineStart markdownH1 markdownH2 markdownHeadingRule markdownRule markdownCode markdownCodeBlock markdownIdDeclaration
+    " REDEFINE THE MARKDOWN ITEMS ANCHORED WITH "^", OBSERVING THE
+    " DEFINITION ORDER.
+    syn match markdownLineStart		contained "^\s*///\s*[<@]\@!" contains=@markdownBlock,javaMarkdownCommentTitle,javaMarkdownCommentMask nextgroup=@markdownBlock,htmlSpecialChar
+    " See https://spec.commonmark.org/0.31.2/#setext-headings.
+    syn match markdownH1		contained "^\s*/// \{,3}.\+\r\=\n\s*/// \{,3}=\+\s*$" contains=@markdownInline,markdownHeadingRule,markdownAutomaticLink,javaMarkdownCommentMask
+    syn match markdownH2		contained "^\s*/// \{,3}.\+\r\=\n\s*/// \{,3}-\+\s*$" contains=@markdownInline,markdownHeadingRule,markdownAutomaticLink,javaMarkdownCommentMask
+    " See https://spec.commonmark.org/0.31.2/#atx-headings.
+    syn region markdownH1		contained matchgroup=markdownH1Delimiter start=" \{,3}#\s" end="#*\s*$" keepend contains=@markdownInline,markdownAutomaticLink oneline
+    syn region markdownH2		contained matchgroup=markdownH2Delimiter start=" \{,3}##\s" end="#*\s*$" keepend contains=@markdownInline,markdownAutomaticLink oneline
+    syn match markdownHeadingRule	contained "^\s*/// \{,3}[=-]\+\s*$" contains=javaMarkdownCommentMask
+    " See https://spec.commonmark.org/0.31.2/#thematic-breaks.
+    syn match markdownRule		contained "^\s*/// \{,3}\*\s*\*\%(\s*\*\)\+\s*$" contains=javaMarkdownCommentMask
+    syn match markdownRule		contained "^\s*/// \{,3}_\s*_\%(\s*_\)\+\s*$" contains=javaMarkdownCommentMask
+    syn match markdownRule		contained "^\s*/// \{,3}-\s*-\%(\s*-\)\+\s*$" contains=javaMarkdownCommentMask
+    " See https://spec.commonmark.org/0.31.2/#indented-code-blocks.
+    syn region markdownCodeBlock	contained start="^\s*///\%( \{4,}\|\t\)" end="^\ze\s*///\%(\s*$\| \{,3}\S\)" keepend contains=javaMarkdownCommentMask
+    " See https://spec.commonmark.org/0.31.2/#code-spans.
+    syn region markdownCode		contained matchgroup=markdownCodeDelimiter start="\z(`\+\) \=" end=" \=\z1" keepend contains=markdownLineStart,javaMarkdownCommentMask
+    " See https://spec.commonmark.org/0.31.2/#fenced-code-blocks.
+    syn region markdownCodeBlock	contained start="^\s*/// \{,3}\z(```\+\)\%(.\{-}[^`]`\)\@!" end="^\s*/// \{,3}\z1`*" keepend contains=javaMarkdownCommentMask
+    syn region markdownCodeBlock	contained start="^\s*/// \{,3}\z(\~\~\~\+\)" end="^\s*/// \{,3}\z1\~*" keepend contains=javaMarkdownCommentMask
+    " See https://spec.commonmark.org/0.31.2/#link-reference-definitions.
+    syn region markdownIdDeclaration	contained matchgroup=markdownLinkDelimiter start="^\s*/// \{,3\}!\=\[" end="\]:" keepend contains=javaMarkdownCommentMask nextgroup=markdownUrl oneline skipwhite
+    " See https://spec.commonmark.org/0.31.2/#link-label.
+    syn region markdownId		contained matchgroup=markdownIdDelimiter start="\[\%([\t ]\]\)\@!" end="\]" contains=javaMarkdownSkipBrackets,javaMarkdownCommentMask
+    " Note that escaped brackets can be unbalanced.
+    syn match javaMarkdownSkipBrackets	contained transparent "\\\[\|\\\]"
+    " See https://spec.commonmark.org/0.31.2/#shortcut-reference-link.
+    syn region javaMarkdownShortcutLink	contained matchgroup=markdownLinkTextDelimiter start="!\=\[^\@!\%(\_[^][]*\%(\[\_[^][]*\]\_[^][]*\)*]\%([[(]\)\@!\)\@=" end="\]\%([[(]\)\@!" contains=@markdownInline,markdownLineStart,javaMarkdownSkipBrackets,javaMarkdownCommentMask nextgroup=markdownLink,markdownId skipwhite
+
+    for s:name in ['markdownFootnoteDefinition', 'markdownFootnote']
+      if hlexists(s:name)
+	exec 'syn clear ' . s:name
+      endif
+    endfor
+
+    unlet s:name
+
+    " COMBAK: Footnotes are recognised by "markdown.vim", but are not
+    " in CommonMark.  See https://pandoc.org/MANUAL.html#footnotes.
+""""syn match markdownFootnoteDefinition contained "^\s*///\s*\[^[^\]]\+\]:" contains=javaMarkdownCommentMask
+
+    hi def link javaMarkdownComment	Comment
+    hi def link javaMarkdownCommentMask	javaMarkdownComment
+    hi def link javaMarkdownCommentTitle SpecialComment
+    hi def link javaMarkdownShortcutLink htmlLink
+  endif
+
+  if s:with_html
+    syn region javaDocComment	start="/\*\*" end="\*/" keepend contains=javaCommentTitle,@javaHtml,@javaDocTags,javaTodo,javaCommentError,javaSpaceError,@Spell fold
+    exec 'syn region javaCommentTitle contained matchgroup=javaDocComment start="/\*\*" matchgroup=javaCommentTitle end="\.$" end="\.[ \t\r]\@=" end="\%(^\s*\**\s*\)\@' . s:ff.Peek('80', '') . '<=@"me=s-2,he=s-1 end="\*/"me=s-1,he=s-1 contains=@javaHtml,javaCommentStar,javaTodo,javaCommentError,javaSpaceError,@Spell,@javaDocTags'
+    syn region javaCommentTitle	contained matchgroup=javaDocComment start="/\*\*\s*\r\=\n\=\s*\**\s*\%({@return\>\)\@=" matchgroup=javaCommentTitle end="}\%(\s*\.*\)*" contains=@javaHtml,javaCommentStar,javaTodo,javaCommentError,javaSpaceError,@Spell,@javaDocTags,javaTitleSkipBlock
+    syn region javaCommentTitle	contained matchgroup=javaDocComment start="/\*\*\s*\r\=\n\=\s*\**\s*\%({@summary\>\)\@=" matchgroup=javaCommentTitle end="}" contains=@javaHtml,javaCommentStar,javaTodo,javaCommentError,javaSpaceError,@Spell,@javaDocTags,javaTitleSkipBlock
+    hi def link javaDocComment		Comment
+    hi def link javaCommentTitle	SpecialComment
+  endif
+
   " The members of javaDocTags are sub-grouped according to the Java
   " version of their introduction, and sub-group members in turn are
   " arranged in alphabetical order, so that future newer members can
@@ -403,13 +502,29 @@
   syn match  javaDocSerialFieldTag contained "@serialField\>"
   syn match  javaDocVersionTag	contained "@version\>"
 
-  syn match  javaDocSeeTag	contained "@see\>" nextgroup=javaDocSeeTag1,javaDocSeeTag2,javaDocSeeTag3,javaDocSeeTagStar skipwhite skipempty
-  syn match  javaDocSeeTagStar	contained "^\s*\*\+\%(\s*{\=@\|/\|$\)\@!" nextgroup=javaDocSeeTag1,javaDocSeeTag2,javaDocSeeTag3 skipwhite skipempty
+  syn match javaDocSeeTag contained "@see\>\s*" nextgroup=javaDocSeeTag1,javaDocSeeTag2,javaDocSeeTag3,javaDocSeeTag4,javaDocSeeTagStar,javaDocSeeTagSlash skipwhite skipempty
+
+  if s:with_html
+    syn match  javaDocSeeTagStar contained "^\s*\*\+\%(\s*{\=@\|/\|$\)\@!" nextgroup=javaDocSeeTag1,javaDocSeeTag2,javaDocSeeTag3,javaDocSeeTag4 skipwhite skipempty
+    hi def link javaDocSeeTagStar javaDocComment
+  endif
+
+  if s:with_markdown
+    syn match  javaDocSeeTagSlash contained "^\s*///\%(\s*{\=@\|$\)\@!" nextgroup=javaDocSeeTag1,javaDocSeeTag2,javaDocSeeTag3,javaDocSeeTag4 skipwhite skipempty
+    hi def link javaDocSeeTagSlash javaMarkdownComment
+  endif
+
   syn match  javaDocSeeTag1	contained @"\_[^"]\+"@
   syn match  javaDocSeeTag2	contained @<a\s\+\_.\{-}</a>@ contains=@javaHtml extend
-  syn match  javaDocSeeTag3	contained @["< \t]\@!\%(\k\|[/.]\)*\%(##\=\k\+\%((\_[^)]*)\)\=\)\=@ nextgroup=javaDocSeeTag3Label skipwhite skipempty
+  exec 'syn match javaDocSeeTag3 contained @[' . s:ff.WithMarkdown('[', '') . '"< \t]\@!\%(\k\|[/.]\)*\%(##\=\k\+\%((\_[^)]*)\)\=\)\=@ nextgroup=javaDocSeeTag3Label skipwhite skipempty'
   syn match  javaDocSeeTag3Label contained @\k\%(\k\+\s*\)*$@
 
+  " COMBAK: No support for type javaDocSeeTag2 in Markdown.
+""if s:with_markdown
+""  syn match  javaDocSeeTag4	contained @\[.\+\]\s\=\%(\[.\+\]\|(.\+)\)@ contains=@javaMarkdown extend
+""  hi def link javaDocSeeTag4	Special
+""endif
+
   syn region javaCodeSkipBlock	contained transparent start="{\%(@code\>\)\@!" end="}" contains=javaCodeSkipBlock,javaDocCodeTag
   syn region javaDocCodeTag	contained start="{@code\>" end="}" contains=javaDocCodeTag,javaCodeSkipBlock
 
@@ -418,9 +533,6 @@
   syn region javaDocSnippetTag	contained start="{@snippet\>" end="}" contains=javaDocSnippetTag,javaSnippetSkipBlock,javaDocSnippetTagAttr,javaCommentMarkupTag
 
   syntax case match
-  hi def link javaDocComment		Comment
-  hi def link javaDocSeeTagStar		javaDocComment
-  hi def link javaCommentTitle		SpecialComment
   hi def link javaDocParam		Function
 
   hi def link javaDocAuthorTag		Special
@@ -729,7 +841,7 @@
 
 let b:spell_options = "contained"
 let &cpo = s:cpo_save
-unlet s:ff s:cpo_save
+unlet s:cpo_save s:ff s:with_html s:with_markdown
 
 " See ":help vim9-mix".
 if !has("vim9script")
@@ -757,4 +869,4 @@
   setlocal foldtext=s:JavaSyntaxFoldTextExpr()
   delfunction! g:JavaSyntaxFoldTextExpr
 endif
-" vim: sw=2 ts=8 noet sta
+" vim: fdm=syntax sw=2 ts=8 noet sta
diff --git a/runtime/syntax/testdir/dumps/java_comments_04.dump b/runtime/syntax/testdir/dumps/java_comments_04.dump
deleted file mode 100644
index d415c02..0000000
--- a/runtime/syntax/testdir/dumps/java_comments_04.dump
+++ /dev/null
@@ -1,20 +0,0 @@
-| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@72
-|-+0#0000e05#a8a8a8255| | +0#0000000#ffffff0@3|/+0#0000e05&|*@1| |{+8#e000e06&|@|s|u|m@1|a|r|y| |C|o|m|p|a|r|e|s| |t|h|i|s| |i|n|s|t|a|n|c|e| |w|i|t|h| |t|h|e| |p|a|s@1|e|d| |{+0&&|@|c|o|d|e| |t|h|a|t|}| +0#0000000&@3
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@4|*| +8#e000e06&|i|n|s|t|a|n|c|e| |f|o|r| |o|r|d|e|r| |b|y| |i|n|v|o|k|i|n|g| |{+0&&|@|l|i|n|k| |I|n|t|e|g|e|r|#|c|o|m|p|a|r|e|(|i|n|t|,| |i|n|t|)| +0#0000000&@2
-||+0#0000e05#a8a8a8255| | +0#e000e06#ffffff0@4|*| |c|o|m|p|a|r|e|}| +8&&|a|n|d| |p|a|s@1|i|n|g| |i|t| |{+0&&|@|c|o|d|e| |t|h|i|s|.|m|a|j|o|r|V|e|r|s|i|o|n|(|)|}| +8&&|a|n|d| +0#0000000&@10
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@4|*| +8#e000e06&|{+0&&|@|c|o|d|e| |t|h|a|t|.|m|a|j|o|r|V|e|r|s|i|o|n|(|)|}| +8&&|a|s| |r|e|s|p|e|c|t|i|v|e| |@|a|r|g|u|m|e|n|t|s|.|}| +0#0000000&@11
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@4>*| +0#0000000&@66
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@4|*| |{+0#e000e06&|@|i|n|h|e|r|i|t|D|o|c|}| +0#0000e05&|*|/| +0#0000000&@49
-| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|@+0#e000e06&|O|v|e|r@1|i|d|e| +0#0000000&|p+0#00e0003&|u|b|l|i|c| +0#0000000&|i+0#00e0003&|n|t| +0#0000000&|c|o|m|p|a|r|e|T|o|(|C|o|m@1|e|n|t|s|T|e|s|t|s| |t|h|a|t|)| @18
-|-+0#0000e05#a8a8a8255| | +0#0000000#ffffff0@3|{| @67
-||+0#0000e05#a8a8a8255| | +0#0000000#ffffff0@7|j|a|v|a|.|u|t|i|l|.|O|b|j|e|c|t|s|.|r|e|q|u|i|r|e|N|o|n|N|u|l@1|(|t|h|a|t|,| |"+0#e000002&|t|h|a|t|"|)+0#0000000&|;| @17
-||+0#0000e05#a8a8a8255| | +0#0000000#ffffff0@7|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|I|n|t|e|g|e|r|.|c|o|m|p|a|r|e|(|t+0#00e0003&|h|i|s|.+0#0000000&|m|a|j|o|r|V|e|r|s|i|o|n|(|)|,| @21
-||+0#0000e05#a8a8a8255| | +0#0000000#ffffff0@23|t|h|a|t|.|m|a|j|o|r|V|e|r|s|i|o|n|(|)@1|;| @27
-||+0#0000e05#a8a8a8255| | +0#0000000#ffffff0@3|}| @67
-| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@72
-|-+0#0000e05#a8a8a8255| | +0#0000000#ffffff0@3|/+0#0000e05&|*@1| +8#e000e06&|R|e|t|u|r|n|s| |a|n| |e|m|p|t|y| |s|t|r|i|n|g| |f|o|r| |a|n| |@|O|v|e|r@1|i|d|e| |a|n@1|o|t|a|t|e|d| |m|e|t|h|o|d| +0#0000000&@7
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@3|*| +8#e000e06&|(|s|e@1| |C|h|a|p|t|e|r| |9|.|6|.|4|.|4| |{+0&&|@|l|i|t|e|r|a|l| |@|O|v|e|r@1|i|d|e|}| +8&&|i|n| |a| |J|a|v|a| |L|a|n|g|u|a|g|e| +0#0000000&@6
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@3|*| +8#e000e06&|S|p|e|c|i|f|i|c|a|t|i|o|n|)| |o|v|e|r@1|i|d@1|e|n| |f|r|o|m| |<+0#00e0e07&|c+0#af5f00255&|o|d|e|>+0#00e0e07&|j+8#e000e06&|a|v|a|.|l+8&#ffd7d7255|a|n|g|.+8&#ffffff0|O|b|j|e|c|t|<+0#00e0e07&|/|c+0#af5f00255&|o|d|e|>+0#00e0e07&| +0#0000000&@6
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@3|*| +0#0000000&@67
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@3|*| |@+0#e000e06&|r|e|t|u|r|n| +0#0000e05&|a|n| |e|m|p|t|y| |s|t|r|i|n|g| |*|/@2| |N|o| |p|e|r|i|o|d| |f|o|r| |t|h|e| |a|b|o|v|e| |s|u|m@1|a|r|y|!| +0#0000000&@5
-@57|7|3|,|3|-|6| @7|6|5|%| 
diff --git a/runtime/syntax/testdir/dumps/java_comments_05.dump b/runtime/syntax/testdir/dumps/java_comments_05.dump
deleted file mode 100644
index 85492d8..0000000
--- a/runtime/syntax/testdir/dumps/java_comments_05.dump
+++ /dev/null
@@ -1,20 +0,0 @@
-||+0#0000e05#a8a8a8255| | +0&#ffffff0@3|*| |@+0#e000e06&|r|e|t|u|r|n| +0#0000e05&|a|n| |e|m|p|t|y| |s|t|r|i|n|g| |*|/@2| |N|o| |p|e|r|i|o|d| |f|o|r| |t|h|e| |a|b|o|v|e| |s|u|m@1|a|r|y|!| +0#0000000&@5
-| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|@+0#e000e06&|O|v|e|r@1|i|d|e| +0#0000000&|p+0#00e0003&|u|b|l|i|c| +0#0000000&|S|t|r|i|n|g| |t|o|S|t|r|i|n|g|(|)| |{| |r+0#af5f00255&|e|t|u|r|n| +0#0000000&|"+0#e000002&@1|;+0#0000000&| |}| @19
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deleted file mode 100644
index 84336a3..0000000
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deleted file mode 100644
index f83433e..0000000
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index f0ecd9d..be35389 100644
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diff --git a/runtime/syntax/testdir/dumps/java_comments_02.dump b/runtime/syntax/testdir/dumps/java_comments_html_02.dump
similarity index 98%
rename from runtime/syntax/testdir/dumps/java_comments_02.dump
rename to runtime/syntax/testdir/dumps/java_comments_html_02.dump
index 03c4bcf..927415c 100644
--- a/runtime/syntax/testdir/dumps/java_comments_02.dump
+++ b/runtime/syntax/testdir/dumps/java_comments_html_02.dump
@@ -17,4 +17,4 @@
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-@57|3|7|,|2|-|5| @7|3|0|%| 
+@57|3|7|,|2|-|5| @7|2|7|%| 
diff --git a/runtime/syntax/testdir/dumps/java_comments_03.dump b/runtime/syntax/testdir/dumps/java_comments_html_03.dump
similarity index 91%
rename from runtime/syntax/testdir/dumps/java_comments_03.dump
rename to runtime/syntax/testdir/dumps/java_comments_html_03.dump
index a407805..b9b23da 100644
--- a/runtime/syntax/testdir/dumps/java_comments_03.dump
+++ b/runtime/syntax/testdir/dumps/java_comments_html_03.dump
@@ -14,7 +14,7 @@
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-| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@72
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diff --git a/runtime/syntax/testdir/dumps/java_comments_html_04.dump b/runtime/syntax/testdir/dumps/java_comments_html_04.dump
new file mode 100644
index 0000000..bb7e638
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_comments_html_04.dump
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new file mode 100644
index 0000000..d553aa1
--- /dev/null
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new file mode 100644
index 0000000..4d26b94
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new file mode 100644
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new file mode 100644
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diff --git a/runtime/syntax/testdir/dumps/java_comments_markdown_01.dump b/runtime/syntax/testdir/dumps/java_comments_markdown_01.dump
new file mode 100644
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diff --git a/runtime/syntax/testdir/dumps/java_comments_markdown_02.dump b/runtime/syntax/testdir/dumps/java_comments_markdown_02.dump
new file mode 100644
index 0000000..5549348
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_comments_markdown_02.dump
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diff --git a/runtime/syntax/testdir/dumps/java_comments_markdown_03.dump b/runtime/syntax/testdir/dumps/java_comments_markdown_03.dump
new file mode 100644
index 0000000..4c325cb
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_comments_markdown_03.dump
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diff --git a/runtime/syntax/testdir/dumps/java_comments_markdown_04.dump b/runtime/syntax/testdir/dumps/java_comments_markdown_04.dump
new file mode 100644
index 0000000..b91a80b
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_comments_markdown_04.dump
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new file mode 100644
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diff --git a/runtime/syntax/testdir/dumps/java_comments_markdown_06.dump b/runtime/syntax/testdir/dumps/java_comments_markdown_06.dump
new file mode 100644
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new file mode 100644
index 0000000..c6471d6
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new file mode 100644
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+||+0#0000e05#a8a8a8255| | +0&#ffffff0@3|/@2| |[+0#0000000&|4+8#e000e06&|.|3|.|2| |T|h|e| |C|l|a|s@1| |O|b|j|e|c|t|]+0#0000000&|(+0#0000e05&|h+0#e000002&|t@1|p|s|:|/@1|d|o|c|s|.|o|r|a|c|l|e|.|c|o|m|/|j|a|v|a|s|e|/|s|p|e|c|s|/|j|l|s
+||+0#0000e05#a8a8a8255| |/+0#e000002#ffffff0|s|e|2|1|/|h|t|m|l|/|j|l|s|-|4|.|h|t|m|l|#|j|l|s|-|4|.|3|.|2|)+0#0000e05&| +0#0000000&@40
+||+0#0000e05#a8a8a8255| | +0&#ffffff0@3|/@2| |@+0#e000e06&|s|e@1| |j+0#00e0e07&|a|v|a|.|b|a|s|e|/|j|a|v|a|.|l|a|n|g|.|O|b|j|e|c|t|#|t|o|S|t|r|i|n|g|(|)| +0#0000000&@22
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|/+0#0000e05&@1| |@+0#0000000&|s|t|a|r|t| +0#0000e05&|r+0#00e0003&|e|g|i|o|n| +0#0000e05&|=| |t+0#e000002&|o|S|t|r|i|n|g| +0#0000001#a8a8a8255| +0#0000000#ffffff0@40
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3>/+0#0000e05&@1| |@+0#0000000&|r|e|p|l|a|c|e| +0#0000e05&|s+0#00e0003&|u|b|s|t|r|i|n|g| +0#0000e05&|=| |'+0#e000002&|"@1|'| +0#0000e05&|r+0#00e0003&|e|p|l|a|c|e|m|e|n|t| +0#0000e05&|=| |"+0#e000002&|\|u|0@1|2@1|\|u|0@1|2@1|"| +0#0000000&@11
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|/+0#0000e05&@1| |@+0#0000000&|l|i|n|k| +0#0000e05&|r+0#00e0003&|e|g|e|x| +0#0000e05&|=| |'+0#e000002&|\|b|S|t|r|i|n|g|'| +0#0000e05&|t+0#00e0003&|a|r|g|e|t| +0#0000e05&|=| |j+0#e000002&|a|v|a|.|l|a|n|g|.|S|t|r|i|n|g| +0#0000e05&|t+0#00e0003&|y|p|e| +0#0000e05&|=| |l+0#e000002&|i|n|k|p|l|a|i
+| +0#0000e05#a8a8a8255@1|n+0#e000002#ffffff0| +0#0000e05&|:| +0#0000000&@69
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|@+0#e000e06&|O|v|e|r@1|i|d|e| +0#0000000&|p+0#00e0003&|u|b|l|i|c| +0#0000000&|S|t|r|i|n|g| |t|o|S|t|r|i|n|g|(|)| |{| |r+0#af5f00255&|e|t|u|r|n| +0#0000000&|"+0#e000002&@1|;+0#0000000&| |}| @19
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|/+0#0000e05&@1| |@+0#0000000&|e|n|d| +0#0000001#a8a8a8255| +0#0000000#ffffff0@60
+| +0#0000e05#a8a8a8255@1|}+0#0000000#ffffff0| @71
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|4|3|,|2|-|5| @6|B|o|t| 
diff --git a/runtime/syntax/testdir/dumps/java_module_info_00.dump b/runtime/syntax/testdir/dumps/java_module_info_00.dump
index 82ef0b2..07fabd3 100644
--- a/runtime/syntax/testdir/dumps/java_module_info_00.dump
+++ b/runtime/syntax/testdir/dumps/java_module_info_00.dump
@@ -10,7 +10,7 @@
 | +0#0000e05&|*| +0#0000000&@72
 | +0#0000e05&|*| |@+0#e000e06&|u|s|e|s| |o+0#00e0e07&|r|g|.|d|e|m|o|.|i|n|t|e|r|n|a|l|.|T|e|s|t|a|b|l|e| +0#0000000&@39
 | +0#0000e05&|*| |@+0#e000e06&|p|r|o|v|i|d|e|s| |o+0#00e0e07&|r|g|.|d|e|m|o|.|i|n|t|e|r|n|a|l|.|T|e|s|t|a|b|l|e| +0#0000000&@35
-| +0#0000e05&|*| |@+0#e000e06&|s|e@1| +0#0000e05&|S+0#00e0e07&|e|r|v|i|c|e|L|o|a|d|e|r| +0#0000000&@53
+| +0#0000e05&|*| |@+0#e000e06&|s|e@1| |S+0#00e0e07&|e|r|v|i|c|e|L|o|a|d|e|r| +0#0000000&@53
 | +0#0000e05&|*|/| +0#0000000&@71
 |m+0#00e0003&|o|d|u|l|e| +0#0000000&|o|r|g|.|m+0#00e0003&|o|d|u|l|e|.+0#0000000&|i|n|f|o|.|d|e|m|o| |/+0#0000e05&@1| |J|D|K| |2|3|+| |(|-@1|e|n|a|b|l|e|-|p|r|e|v|i|e|w| |-@1|r|e|l|e|a|s|e| |2|3|)|.| +0#0000000&@3
 |{| @73
diff --git a/runtime/syntax/testdir/dumps/java_numbers_01.dump b/runtime/syntax/testdir/dumps/java_numbers_01.dump
index a66487a..d9aee00 100644
--- a/runtime/syntax/testdir/dumps/java_numbers_01.dump
+++ b/runtime/syntax/testdir/dumps/java_numbers_01.dump
@@ -13,7 +13,7 @@
 @16|1+0#e000002&|e|+|3|,+0#0000000&| |1+0#e000002&|E|+|3|D|,+0#0000000&| |1+0#e000002&|e|+|3|f|,+0#0000000&| @39
 @12|1+0#e000002&|d|,+0#0000000&| |1+0#e000002&|D|,+0#0000000&| |1+0#e000002&|f|,+0#0000000&| |1+0#e000002&|F|,+0#0000000&| @47
 @75
-|/+0#0000e05&@3| |M|A|L|F|O|R|M|E|D|:| |:|l|e|t| |g|:|j|a|v|a|_|c|o|m@1|e|n|t|_|s|t|r|i|n|g|s| |=| |1| ||| |d|o|a|u|t|o|c|m|d| |S|y|n|t|a|x| +0#0000000&@8
+|/+0#0000e05&@2|/+0#e000e06&| |M|A|L|F|O|R|M|E|D|:| |:|l|e|t| |g|:|j|a|v|a|_+0#ffffff16#ff404010|c+0#e000e06#ffffff0|o|m@1|e|n|t|_+0#ffffff16#ff404010|s+0#e000e06#ffffff0|t|r|i|n|g|s| |=| |1| ||| |d|o|a|u|t|o|c|m|d| |S|y|n|t|a|x| +0#0000000&@8
 |/+0#0000e05&@1| @9|0|_|x|.|0|p|0|,| |0|x|.|_|0|p|0|,| |0|x|.|0|_|p|0|,| |0|x|.|0|p|_|0|,| |0|x|.|0|p|0|_|,| +0#0000000&@18
 |/+0#0000e05&@1| @9|0|x|0|_|.|0|p|0|,| |0|x|_|0|.|0|p|0|,| |0|x|p|0|,| +0#0000000&@37
 @8|}|;| @64
diff --git a/runtime/syntax/testdir/input/java_comments.java b/runtime/syntax/testdir/input/java_comments_html.java
similarity index 74%
rename from runtime/syntax/testdir/input/java_comments.java
rename to runtime/syntax/testdir/input/java_comments_html.java
index 35f6f7d..eeffef5 100644
--- a/runtime/syntax/testdir/input/java_comments.java
+++ b/runtime/syntax/testdir/input/java_comments_html.java
@@ -1,7 +1,7 @@
 // VIM_TEST_SETUP unlet! g:java_no_tab_space_error g:java_ignore_javadoc
 // VIM_TEST_SETUP unlet! g:java_no_trail_space_error
 // VIM_TEST_SETUP let [g:java_space_errors,g:java_comment_strings]=[1,1]
-
+// VIM_TEST_SETUP let g:java_ignore_markdown = 1
 
 
 
@@ -18,14 +18,14 @@
 
 
 
-/**/ /*/ */ /* /*/ /*/*/ /*//*/ /** Comment tests.
+/**/ /*/ */ /* /*/ /*/*/ /*//*/ /** HTML comment tests.
  * <p>There is no entry point method {@code main}:
- * {@snippet file = Snippets.java region = main id = _01}
+ * {@snippet file = HTMLSnippets.java region = main id = _01}
  * <p>There is no textual representation:
- * {@snippet class = Snippets region = toString id = _02} */
-class CommentsTests implements Comparable<CommentsTests>
-{
-	private CommentsTests() { }
+ * {@snippet class = HTMLSnippets region = toString id = _02} */
+class HTMLCommentsTests implements Comparable<HTMLCommentsTests>
+{	// JDK 21+.
+	private HTMLCommentsTests() { }
 
 	/** No-op, i. e. no operation.
 	* ({@literal@literal} may be used with {@code .} for contraction.)
@@ -63,36 +63,43 @@
 	/** {@return {@code null}, with no-op, i.e. no operation} . . */
 	Void noOp9() { return null; }
 
-	/** {@return the major Java version} @hidden */
+	/** {@return the major Java version}
+	 * @hidden */
 	protected int majorVersion() { return 21; }
 
 	/** {@summary Compares this instance with the passed {@code that}
 	 * instance for order by invoking {@link Integer#compare(int, int)
 	 * compare} and passing it {@code this.majorVersion()} and
 	 * {@code that.majorVersion()} as respective @arguments.}
-	 *
 	 * {@inheritDoc} */
-	@Override public int compareTo(CommentsTests that)
+	@Override public int compareTo(HTMLCommentsTests that)
 	{
 		java.util.Objects.requireNonNull(that, "that");
 		return Integer.compare(this.majorVersion(),
 						that.majorVersion());
 	}
 
+	/// Returns an empty string for an @Override annotated method
+	/// (see Chapter 9.6.4.4 {@literal @Override} in a Java Language
+	/// Specification) overridden from `java.lang.Object`
+	///
+	/// @return an empty string /// No period for the above summary!
+	private String asString() { return ""; }
+
 	/** Returns an empty string for an @Override annotated method
 	* (see Chapter 9.6.4.4 {@literal @Override} in a Java Language
 	* Specification) overridden from <code>java.lang.Object</code>
 	*
 	* @return an empty string */// No period for the above summary!
-	@Override public String toString() { return ""; }
+	@Override public String toString() { return asString(); }
 }
 
-// javadoc --snippet-path . --source-path . -d /tmp/docs/ -package \
-// 	-tag 'jls:a:See Java Language Specification:' Snippets.java
-/** Snippets for comment tests. */
-class Snippets
+// javadoc --snippet-path . --source-path . -d /tmp/html_docs/ -package \
+// 	-tag 'jls:a:See Java Language Specification:' HTMLSnippets.java
+/** Snippets for HTML comment tests. */
+class HTMLSnippets
 {	/* 	TRAILING BLANKS AND MESSPILLINGS ARE SIGNIFICANT! */
-	private Snippets() { }
+	private HTMLSnippets() { }
 
 	/** The method {@code main} must be declared {@code public}, {@code
 	 * static}, and {@code void}.  It must specify a formal parameter
@@ -113,6 +120,8 @@
 
 	/** {@return an empty string}
 	 * @see <a href="https://docs.oracle.com/javase/specs/jls/se21/html/jls-3.html#jls-3.10.5">3.10.5 String Literals</a>
+	 * @see
+	 * <a href="https://docs.oracle.com/javase/specs/jls/se21/html/jls-4.html#jls-4.3.2">4.3.2 The Class Object</a>
 	 * @see java.base/java.lang.Object#toString() */
 	// @start region = toString	
 	// @replace substring = '""' replacement = "\u0022\u0022"
diff --git a/runtime/syntax/testdir/input/java_comments_markdown.java b/runtime/syntax/testdir/input/java_comments_markdown.java
new file mode 100644
index 0000000..fa36971
--- /dev/null
+++ b/runtime/syntax/testdir/input/java_comments_markdown.java
@@ -0,0 +1,147 @@
+// VIM_TEST_SETUP unlet! g:java_no_tab_space_error g:java_ignore_javadoc
+// VIM_TEST_SETUP unlet! g:java_no_trail_space_error
+// VIM_TEST_SETUP let[g:java_space_errors,g:java_comment_strings]=[1,1]
+// VIM_TEST_SETUP let[g:java_ignore_html,g:markdown_syntax_conceal]=[1,1]
+
+
+
+
+
+// VIM_TEST_SETUP defer execute('match Visual /\%>21l\s\+$/')
+// VIM_TEST_SETUP setl spell fdc=2 fdl=64 fdm=syntax fen cole=3 cocu=n
+// VIM_TEST_SETUP highlight link javaCommentStart Todo
+// VIM_TEST_SETUP highlight link javaMarkdownCommentTitle Underlined
+// VIM_TEST_SETUP highlight link markdownH2 NonText
+// VIM_TEST_SETUP highlight link markdownHeadingRule NonText
+
+
+
+
+
+/**/ /*/ */ /* /*/ /*/*/ /*//*/ /// Markdown comment tests.
+///
+/// There is no entry point method `main`:
+/// {@snippet file = MarkdownSnippets.java region = main id = _01}
+///
+/// There is no textual representation:
+/// {@snippet class = MarkdownSnippets region = toString id = _02}
+class MarkdownCommentsTests implements Comparable<MarkdownCommentsTests>
+{	// JDK 23+.
+	private MarkdownCommentsTests() { }
+
+	/// No-op, i. e. no operation.
+	/// ({@literal@literal} may be used with `.` for contraction.)
+	/// @return `null`
+	Void noOp1() { return null; }
+
+	/// No-op, i.e. no operation.
+	/// ({@literal<!-- -->} may be used after `.` for contraction.)
+	/// @return `null`
+	Void noOp2() { return null; }
+
+	/// No-op, i.e\u002e no operation.
+	/// ({@literal\u005cu002e} is processed early, use alternatives.)
+	/// @return `null`
+	Void noOp3() { return null; }
+
+	/// No-op, i.e{@literal .} no operation.
+	/// @return `null`
+	Void noOp4() { return null; }
+
+	/// No-op, i.e.<!-- --> no operation.
+	/// @return `null`
+	Void noOp5() { return null; }
+
+	/// No-op, i.e.&nbsp;no operation.
+	/// @return `null`
+	Void noOp6() { return null; }
+
+	/// {@return `null`, with no-op, i.e. no operation}
+	Void noOp7() { return null; }
+
+	/// {@return `null`, with no-op, i.e. no operation}..
+	Void noOp8() { return null; }
+
+	/// {@return `null`, with no-op, i.e. no operation} . .
+	Void noOp9() { return null; }
+
+	/// {@return the major Java version}
+	/// @hidden
+	protected int majorVersion() { return 23; }
+
+	///    {@summary Compares this instance with the passed `that`
+	/// instance for order by invoking [Integer.compare(int, int)]
+	/// and passing it `this.majorVersion()` and
+	/// `that.majorVersion()` as respective @arguments.}
+	/// {@inheritDoc}
+	@Override public int compareTo(MarkdownCommentsTests that)
+	{
+		java.util.Objects.requireNonNull(that, "that");
+		return Integer.compare(this.majorVersion(),
+						that.majorVersion());
+	}
+
+	/** Returns an empty string for an @Override annotated method
+	* (see Chapter 9.6.4.4 {@literal @Override} in a Java Language
+	* Specification) overridden from <code>java.lang.Object</code>
+	*
+	* @return an empty string */// No period for the above summary!
+	private String asString() { return ""; }
+
+	/// Returns an empty string for an @Override annotated method
+	/// (see Chapter 9.6.4.4 {@literal @Override} in a Java Language
+	/// Specification) overridden from `java.lang.Object`
+	///
+	/// @return an empty string /// No period for the above summary!
+	@Override public String toString() { return asString(); }
+
+	/// A summary comment.
+	static final String MARKDOWN_COMMENT_A = "///";
+	/// No summary comment (try fiddling with the above string value).
+	static final String MARKDOWN_COMMENT_B = "///";
+}
+
+// javadoc --snippet-path . --source-path . -d /tmp/md_docs/ -package \
+// 	-tag 'jls:a:See Java Language Specification:' MarkdownSnippets.java
+/// Snippets for Markdown comment tests.
+class MarkdownSnippets
+{	/* 	TRAILING BLANKS AND MESSPILLINGS ARE SIGNIFICANT! */
+	private MarkdownSnippets() { }
+
+	/// The method [`main`] must be declared `public`,
+	/// `static`, and `void`.  It must specify a formal parameter
+	/// whose declared type is array of [String].  Therefore,
+	/// _either_ of the following declarations is acceptable.  [^\*]
+	///
+	/// ---------------------------------------------------------------
+	/// DECLARATIONS ([main(String\[\])][#main(String\[\])]):
+	/// -----------------------------------------------------
+	/// * E.g. {@snippet lang="java":
+	/// // @highlight substring="main" type="italic":
+	///    public static void main(String[] args) { }
+	/// }
+	/// + E.g.
+	/// <pre class="snippet">
+	///    public static void main(String... args) { }
+	/// </pre>
+	///
+	/// @param args optional commande-line arguments 
+	/// @jls 12.1.4 Invoke `Test.main`
+	///
+	/// [^\*]: @jls 12.1.4 Invoke `Test.main`
+	// @start region = main		
+	// @link substring = 'String' target = 'java.lang.String' :
+	public static void main(String[] args) { }
+	// @end 
+
+	/// {@return an empty string}
+	/// @see String [3.10.5 String Literals](https://docs.oracle.com/javase/specs/jls/se21/html/jls-3.html#jls-3.10.5)
+	/// @see Object
+	/// [4.3.2 The Class Object](https://docs.oracle.com/javase/specs/jls/se21/html/jls-4.html#jls-4.3.2)
+	/// @see java.base/java.lang.Object#toString()
+	// @start region = toString	
+	// @replace substring = '""' replacement = "\u0022\u0022"
+	// @link regex = '\bString' target = java.lang.String type = linkplain :
+	@Override public String toString() { return ""; }
+	// @end 
+}