Yes, it helped! Thank you!

To make the story complete I put here complete code:

semantic/hello.clj:

(ns semantic.hello
  (:gen-class
   :name semantic.hello
   :methods [[sayhello [] void]
                  [sayhello_arg [String] void]]))

(defn -sayhello [this] (println "Hello from Clojure!"))

(defn -sayhello_arg [this arg] (println (str "Hello " arg "!")))


project.clj:

(defproject google-groups-option "1.0.0-SNAPSHOT"
  :description "FIXME: write"
  :dependencies [[org.clojure/clojure "1.2.0-beta1"]
                         [org.clojure/clojure-contrib "1.2.0-beta1"]]
  :namespaces [semantic.hello])


Test.java:

import semantic.hello;

class Test {
    public static void main(String[] args) {
        semantic.hello h = new semantic.hello();
        h.sayhello();
        h.sayhello_arg("Fred");
    }
}

Though my eclipse still shows errors while editing, it CAN compile and
run this code without problems.

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