diff --git a/runtime/doc/quickfix.txt b/runtime/doc/quickfix.txt
index 671630d..5d97f79 100644
--- a/runtime/doc/quickfix.txt
+++ b/runtime/doc/quickfix.txt
@@ -1,4 +1,4 @@
-*quickfix.txt*  For Vim version 9.1.  Last change: 2024 Nov 12
+*quickfix.txt*  For Vim version 9.1.  Last change: 2024 Nov 28
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1331,10 +1331,117 @@
 JAVAC							*compiler-javac*
 
 Commonly used compiler options can be added to 'makeprg' by setting the
-g:javac_makeprg_params variable.  For example: >
+b/g:javac_makeprg_params variable.  For example: >
 
 	let g:javac_makeprg_params = "-Xlint:all -encoding utf-8"
-<
+
+MAVEN							*compiler-maven*
+
+Commonly used compiler options can be added to 'makeprg' by setting the
+b/g:maven_makeprg_params variable.  For example: >
+
+	let g:maven_makeprg_params = "-DskipTests -U -X"
+
+SPOTBUGS						*compiler-spotbugs*
+
+SpotBugs is a static analysis tool that can be used to find bugs in Java.
+It scans the Java bytecode of all classes in the currently open buffer.
+(Therefore, `:compiler! spotbugs` is not supported.)
+
+Commonly used compiler options can be added to 'makeprg' by setting the
+"b:" or "g:spotbugs_makeprg_params" variable.  For example: >
+
+	let b:spotbugs_makeprg_params = "-longBugCodes -effort:max -low"
+
+The global default is "-workHard -experimental".
+
+By default, the class files are searched in the directory where the source
+files are placed.  However, typical Java projects use distinct directories
+for source files and class files.  To make both known to SpotBugs, assign
+their paths (distinct and relative to their common root directory) to the
+following properties (using the example of a common Maven project): >
+
+	let g:spotbugs_properties = {
+		\ 'sourceDirPath':	'src/main/java',
+		\ 'classDirPath':	'target/classes',
+		\ 'testSourceDirPath':	'src/test/java',
+		\ 'testClassDirPath':	'target/test-classes',
+	\ }
+
+Note that values for the path keys describe only for SpotBugs where to look
+for files; refer to the documentation for particular compiler plugins for more
+information.
+
+The default pre- and post-compiler actions are provided for Ant, Maven, and
+Javac compiler plugins and can be selected by assigning the name of a compiler
+plugin to the "compiler" key: >
+
+	let g:spotbugs_properties = {
+		\ 'compiler':		'maven',
+	\ }
+
+This single setting is essentially equivalent to all the settings below, with
+the exception made for the "PreCompilerAction" and "PreCompilerTestAction"
+values: their listed |Funcref|s will obtain no-op implementations whereas the
+implicit Funcrefs of the "compiler" key will obtain the requested defaults if
+available. >
+
+	let g:spotbugs_properties = {
+		\ 'PreCompilerAction':
+			\ function('spotbugs#DefaultPreCompilerAction'),
+		\ 'PreCompilerTestAction':
+			\ function('spotbugs#DefaultPreCompilerTestAction'),
+		\ 'PostCompilerAction':
+			\ function('spotbugs#DefaultPostCompilerAction'),
+		\ 'sourceDirPath':	'src/main/java',
+		\ 'classDirPath':	'target/classes',
+		\ 'testSourceDirPath':	'src/test/java',
+		\ 'testClassDirPath':	'target/test-classes',
+	\ }
+
+With default actions, the compiler of choice will attempt to rebuild the class
+files for the buffer (and possibly for the whole project) as soon as a Java
+syntax file is loaded; then, `spotbugs` will attempt to analyze the quality of
+the compilation unit of the buffer.
+
+When default actions are not suited to a desired workflow, consider writing
+arbitrary functions yourself and matching their |Funcref|s to the supported
+keys: "PreCompilerAction", "PreCompilerTestAction", and "PostCompilerAction".
+
+The next example re-implements the default pre-compiler actions for a Maven
+project and requests other default Maven settings with the "compiler" entry: >
+
+	function! MavenPreCompilerAction() abort
+		call spotbugs#DeleteClassFiles()
+		compiler maven
+		make compile
+	endfunction
+
+	function! MavenPreCompilerTestAction() abort
+		call spotbugs#DeleteClassFiles()
+		compiler maven
+		make test-compile
+	endfunction
+
+	let g:spotbugs_properties = {
+		\ 'compiler':		'maven',
+		\ 'PreCompilerAction':
+			\ function('MavenPreCompilerAction'),
+		\ 'PreCompilerTestAction':
+			\ function('MavenPreCompilerTestAction'),
+	\ }
+
+Note that all entered custom settings will take precedence over the matching
+default settings in "g:spotbugs_properties".
+
+The "g:spotbugs_properties" variable is consulted by the Java filetype plugin
+(|ft-java-plugin|) to arrange for the described automation, and, therefore, it
+must be defined before |FileType| events can take place for the buffers loaded
+with Java source files.  It could, for example, be set in a project-local
+|vimrc| loaded by [0].
+
+[0] https://github.com/MarcWeber/vim-addon-local-vimrc/
+
 GNU MAKE						*compiler-make*
 
 Since the default make program is "make", the compiler plugin for make,