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Navigating to Java Class and Method definitionsλ︎

, g g with the cursor on a Java class or method name in a Clojure source code file will jump to its definition. This is useful if you are using Java interop in your Clojure code or using Java libraries as part of your project, e.g. Java swing code example

Add the Java sources locally to also enable searching with ripgrep or ag. Or add a java-source alias when starting a REPL.

Adding a deps.edn alias for Java sourcesλ︎

Using an alias is the recommended way to include Java sources for Clojure CLI projects, as those sources are a only used in the development workflow.

   {java-sources {:local/root "/usr/lib/jvm/openjdk-17/lib/"}}}

   {org.clojure/source {:local/root "~/projects/community/"}}}

practicalli/example deps.edn includes example aliases for java sources

Location of Sources

The location of the Java file may differ on your operating system. You can also extract the file and use the extracted sources.

Include Java sources alias during jack-inλ︎

Add a .dir-locals.el file to the root of your Clojure project to include the java sources alias when running cider-jack-in.

((clojure-mode . ((cider-clojure-cli-aliases . ":src/java17")
                  (cider-preferred-build-tool . "clojure-cli"))))

Or include both Java and Clojure Java sources

((clojure-mode . ((cider-clojure-cli-aliases . ":src/java17:src/clojure")
                  (cider-preferred-build-tool . "clojure-cli"))))

Spacemacs navigation Java definitions

Adding Local Clojure and Java sourcesλ︎

Navigate to Java source files using local copies of the Java Source code. Download and extracting the Clojure and Java sources to your computer.

Java sources are available as Debian/Ubuntu packages

sudo apt install openjdk-17-source

Java source code is part of the JDK installation and can be found at:


Java source code is part of the JDK installation and can be found at:

C:\Program Files\Java\{jdk-version}\

Download the latest Clojure sources from Maven

Extract the Java file and clojure-x-x-x-sources.jar file

Add cider-jdk-src-paths configuration to dotspacemacs/user-config in the .spacemacs file. Change the paths if you extracted the files to a different location.

  (setq cider-jdk-src-paths '("~/projects/java/clojure-1.11.1-sources"

Last update: December 25, 2022