diff --git a/runtime/syntax/java.vim b/runtime/syntax/java.vim
index 9b38ccd..8dabc5e 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:		2025 Jan 02
+" Last Change:		2025 Mar 26
 
 " Please check ":help java.vim" for comments on some of the options
 " available.
@@ -46,8 +46,10 @@
   return a:y
 endfunction
 
-function! s:ff.IsRequestedPreviewFeature(n) abort
-  return exists("g:java_syntax_previews") && index(g:java_syntax_previews, a:n) + 1
+function! s:ff.IsAnyRequestedPreviewFeatureOf(ns) abort
+  return exists("g:java_syntax_previews") &&
+    \ !empty(filter(a:ns, printf('index(%s, v:val) + 1',
+			    \ string(g:java_syntax_previews))))
 endfunction
 
 if !exists("*s:ReportOnce")
@@ -108,7 +110,7 @@
 syn keyword javaOperator	new instanceof
 syn match   javaOperator	"\<var\>\%(\s*(\)\@!"
 
-if s:ff.IsRequestedPreviewFeature(476)
+if s:ff.IsAnyRequestedPreviewFeatureOf([476, 494])
   " Module imports can be used in any source file.
   syn match   javaExternal	"\<import\s\+module\>" contains=javaModuleImport
   syn keyword javaModuleImport	contained module
@@ -262,8 +264,12 @@
     syn keyword javaC_JavaLang Class InheritableThreadLocal ThreadLocal Enum ClassValue
   endif
 
-  " As of JDK 21, java.lang.Compiler is no more (deprecated in JDK 9).
-  syn keyword javaLangDeprecated Compiler
+  " As of JDK 24, SecurityManager is rendered non-functional
+  "	(JDK-8338625).
+  "	(Note that SecurityException and RuntimePermission are still
+  "	not deprecated.)
+  " As of JDK 21, Compiler is no more (JDK-8205129).
+  syn keyword javaLangDeprecated Compiler SecurityManager
   syn cluster javaClasses add=javaC_JavaLang
   hi def link javaC_JavaLang javaC_Java
   syn keyword javaE_JavaLang AbstractMethodError ClassCircularityError ClassFormatError Error IllegalAccessError IncompatibleClassChangeError InstantiationError InternalError LinkageError NoClassDefFoundError NoSuchFieldError NoSuchMethodError OutOfMemoryError StackOverflowError ThreadDeath UnknownError UnsatisfiedLinkError VerifyError VirtualMachineError ExceptionInInitializerError UnsupportedClassVersionError AssertionError BootstrapMethodError
@@ -311,7 +317,7 @@
 
 exec 'syn match javaUserLabel "^\s*\<\K\k*\>\%(\<default\>\)\@' . s:ff.Peek('7', '') . '<!\s*::\@!"he=e-1'
 
-if s:ff.IsRequestedPreviewFeature(455)
+if s:ff.IsAnyRequestedPreviewFeatureOf([455, 488])
   syn region  javaLabelRegion	transparent matchgroup=javaLabel start="\<case\>" matchgroup=NONE end=":\|->" contains=javaBoolean,javaNumber,javaCharacter,javaString,javaConstant,@javaClasses,javaGenerics,javaType,javaLabelDefault,javaLabelVarType,javaLabelWhenClause
 else
   syn region  javaLabelRegion	transparent matchgroup=javaLabel start="\<case\>" matchgroup=NONE end=":\|->" contains=javaLabelCastType,javaLabelNumber,javaCharacter,javaString,javaConstant,@javaClasses,javaGenerics,javaLabelDefault,javaLabelVarType,javaLabelWhenClause
@@ -609,7 +615,7 @@
 syn region  javaString		start=+"""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaSpecialChar,javaSpecialError,javaTextBlockError,@Spell
 syn match   javaTextBlockError	+"""\s*"""+
 
-if s:ff.IsRequestedPreviewFeature(430)
+if s:ff.IsAnyRequestedPreviewFeatureOf([430])
   syn region javaStrTemplEmbExp	contained matchgroup=javaStrTempl start="\\{" end="}" contains=TOP
   exec 'syn region javaStrTempl start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="+ end=+"+ contains=javaStrTemplEmbExp,javaSpecialChar,javaSpecialError,@Spell'
   exec 'syn region javaStrTempl start=+\%(\.[[:space:]\n]*\)\@' . s:ff.Peek('80', '') . '<="""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaStrTemplEmbExp,javaSpecialChar,javaSpecialError,javaTextBlockError,@Spell'
@@ -688,7 +694,7 @@
   syn region  javaDebugString		contained start=+"+ end=+"+ contains=javaDebugSpecial
   syn region  javaDebugString		contained start=+"""[ \t\x0c\r]*$+hs=e+1 end=+"""+he=s-1 contains=javaDebugSpecial,javaDebugTextBlockError
 
-  if s:ff.IsRequestedPreviewFeature(430)
+  if s:ff.IsAnyRequestedPreviewFeatureOf([430])
     " The highlight groups of java{StrTempl,Debug{,Paren,StrTempl}}\,
     " share one colour by default. Do not conflate unrelated parens.
     syn region javaDebugStrTemplEmbExp	contained matchgroup=javaDebugStrTempl start="\\{" end="}" contains=javaComment,javaLineComment,javaDebug\%(Paren\)\@!.*