Java泛型 - 构造函数类型

Question

public class AClass<X extends AnInterface>{

    public AClass(X x){
    }

}

public class Y implements AnInterface{

}

In the calling code if I have:

public static<X extends AnInterface> void main(String args){

    AnInterface y = new Y();
    AClass a = new AClass<AnInterface>(y);

}

I should be able to get this to work using X in the constructor for AClass right? I am getting errors telling me the contructor for AClass should be of type AnInterface??

EDITED to change AClass a = new AClass<AnInterface>(y);

Answer 1

You need to tell AClass what type its expecting.

    public static void main(String args){
        AnInterface y = new Y();
        AClass<AnInterface> a = new AClass<AnInterface>(y);
    }

Answer 2

public static void main(String[] args) {
    AnInterface y = new Y();
    AClass a = new AClass(y);
}