Call clojure FN from JAR file

Call.java

public class Call {
  public void printPlus() {
    final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    final Class c = Class.forName("clojure.lang.RT", true, classLoader);
    final Method method = c.getDeclaredMethod("var", String.class, String.class);
    Object var = method.invoke(null, "clojure.core", "+");
    Class<?> varClass = var.getClass();
    final Method plus = varClass.getDeclaredMethod("invoke", Object.class, Object.class, Object.class);

    System.out.println(plus.invoke(var, 1, 2, 3));
  }
}