如何将实现接口的类添加到 ArrayList
为了避免必须在接口中实现所有方法,我创建了一个实现接口的抽象类,然后让其他类扩展抽象类并仅覆盖所需的方法.
To go around having to implement ALL the methods in an interface, I created an abstract class that implements an interface, then have other classes extend the abstract class and override only the needed methods.
我正在为我的应用构建 API/框架.
我想将作为接口实例的类 IMyInterface
添加到 ArrayList
:
I would like to add classes that are instances of an interface IMyInterface
to an ArrayList
:
ArrayList<Class<IMyInterface>> classes = new ArrayList<>();
classes.add(MyClass.class);
这是MyClass
class MyClass extends AbstractIMyInterface {}
这里是AbstractIMyInterface
class AbstractIMyInterface implements IMyInterface {}
到目前为止,这似乎是不可能的.我上面的方法行不通:
So far this seems impossible. My approach above won't work:
add (java.lang.Class
在 ArrayList 中不能应用于
(java.lang.Class
我怎样才能做到这一点,即:添加一个类,将另一个类扩展到 ArrayList
How can I make this work, ie: Add a class extending another class to an ArrayList
你需要使用通配符 吗?扩展 IMyInterface
.
ArrayList<Class<? extends IMyInterface>> classes = new ArrayList<>();
在ArrayList
,你只能添加Class
.