在Clojure中使用C风格的封装技术？

public class HelloWorld {
    public native void sayHello();
}

javac HelloWorld.java
javah HelloWorld

#include <jni.h>
#include<stdio.h>
#include "HelloWorld.h"

JNIEXPORT void JNICALL Java_HelloWorld_sayHello(JNIEnv *env, jobject obj) {
    printf("Hello, World!\n");
}

gcc -shared -o libHelloWorld.so -I${JAVA_HOME}/include -I${JAVA_HOME}/include/linux HelloWorld.c

(ns hello-world.core
  (:import [HelloWorld]))

(defn -main []
  (let [hello-world (HelloWorld.)]
    (.sayHello hello-world)))