英文:
Using methods defined in a interface to call the clone method
问题
为了简短明了，我有一个形状列表 List<Shapes>，其中包含实现了我的 Shape 接口的各种形状（圆形、正方形等）。
现在我正试图对列表中的每个形状进行深层克隆/复制，并将其放入一个新列表中。
我已经让所有形状实现了 Clonable，并为它们编写了自己的深层复制方法。
问题是，当它们仅被定义为 Shapes 时，我无法访问克隆方法。
我的问题是，如何在不必将它们转换为具体形状的情况下获取克隆方法。
我一直在思考并搜索，但似乎找不到一个合适的答案。
所以我有一个想法。
我能否在我的形状接口中添加一个方法 "void callCloneMethod();"，
然后让具体实现调用每个具体形状的 clone() 方法呢？
换句话说，一个接口实现的方法能否调用非接口实现的方法？
提前谢谢你的回答。
英文:
So to keep it short and simple i have a list of shapes List<Shapes> these are all shapes (Circle, square ect) that implement my Shape interface.
Now im trying to deep clone/copy every shape on this list and place it in. a new list.
I have made all the shapes implement Clonable and made my own methods for making deeps copies of them.
The problem is i cant reach the clone method when they are simply defined as Shapes.
My question is how do i get a hold of the clone method without having to cast them into concrete shapes.
I have been thinking about it and googling it but i cant seem to find a proper answer.
And so i got an idea.
could i add a method "void callCloneMethod();" in my shapes interface
and have the implementation call the clone() method of each concrete shape?
IOW can a interface implemented method call non interface implemented methods. ?
Thank you in advance.
答案1
得分: 1
你是否尝试让你的Shape接口扩展Cloneable接口？这应该允许你对任何Shape调用该方法，如果我没记错的话。然后，你当然应该实现clone方法。
希望这能帮到你。
英文:
Did you try to let your Shape interface extend the Cloneable interface? This should allow you to call the method for any Shape, if i am not mistaken. You should then of course implement the clone method.
Hope this helps.
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