import java.util.ServiceLoader;

public class HowdyTalkyLoader {
    public HowdyTalkyLoader() {
        ServiceLoader<HowdyTalky> loader = ServiceLoader.load(HowdyTalky.class);

        for (HowdyTalky talky: loader) {
            System.out.println(talky.getClass());
            System.out.println(talky.sayHello());
        }

    }

    public static void main(String[] args) {
        new HowdyTalkyLoader();
    }
}