Using custom Java classes in Clojure REPL

Question

In Eclipse, using the CCW plug-in, I want to load a clojure file into a REPL. The problem is that I have an import statement for one of my own java classes, but apparently it is not in my classpath.

(ns my-clj-ns
  (:import [alg.gen Enumerator]))

Do I have to make jars out of every class that I want use/test in a Clojure REPL?

Currently, trying to load my clj into a REPL results in an error: "Load file in Clojure REPL" did not complete normally. Please see the log for more information. java.lang.NullPointerException

Any help would be greatly appreciated.

Answer 1

You can let leiningen compile these for you using,

:javac-options {:destdir "classes/"}
:java-source-path "src/main/java" ; location of Java source

options or manually compile them and move the class files to the classes/ directory. No need to create a jar.

Answer 2

When you're in the ccw repl, you can hit alt-e to see the stack trace. If you're getting a NullPointerException, I don't think its a classpath issue.