泛型接口

//泛型接口：接口名<T>  ,不能泛型静态常量
public interface MyGeneric<T> {
   String name="张三";

   T server(T t);
}

public class MyGenericImpl implements MyGeneric<String>{
    @Override
    public String server(String s) {
        System.out.println(s);
        return s;
    }
}

public class MyGenericImpl2<T> implements  MyGeneric<T>{

    @Override
    public T server(T t) {
        System.out.println(t);
        return t;
    }
}

public  class Demo01 {
    public static void main(String[] args) {
        MyGenericImpl myGeneric = new MyGenericImpl();
        myGeneric.server("1234");//1234

        MyGenericImpl2<String> myGenericImpl2 = new MyGenericImpl2<>();
        myGenericImpl2.server("1234");//1234

    }
}