public interface Test {

    void domian(String s);

}

public class Demo {

    public static void main(String[] args){

        doDoMain((String s) -> {

            System.out.println(s);

        });

        doDoMain((s) -> System.out.println(s));

        doDoMain(s -> System.out.println(s));

        doDoMain(System.out::println);

    }

    public static void doDoMain(Test t) {

        t.domain("domain");

    }

}