Java中的抽象对象比较 [英] Abstract Object Comparison in Java

问题描述

我正在为抽象对象实现堆。
现在我能够实现一个堆栈，因为不需要比较堆栈。
但是堆需要比较。
所以我有对象A 和对象B 。我可以确保堆中的 Object 是同一类，并且可以对其进行排序（那是该类具有 compareTo 函数来了解如果A< B，A = B或A> B） 。
但是如果我使用 A.compareTo（B），则会收到语法错误，指出 compareTo 是没有为对象定义。
我做了一些研究，发现Object没有实现Comparable。
我该如何解决这个问题。
谢谢。

I am implementing a heap for abstract objects. Now I was able to implement a stack as there are no comparisons required for a Stack. However the heap requires comparisons. So I have Object A, and Object B. I can ensure that the Object that are in the heap are of the same class, and that they can be ordered (that is the class has a compareTo function to know if A<B, A=B, or A>B). But if I use A.compareTo(B), I get a syntax error saying that compareTo is not defined for objects. I did some research and found that Object does not implement Comparable. How can I go about this problem. Thank you.

推荐答案

如果所有对象都是实现了<$ c $的共同祖先的后代，该怎么办？ c>可比？因此，在这种情况下，您可以在代码中使用该类型，而不是 Object 。

What if all your objects were descendants of a common ancestor which do implement Comparable? So in that case you could use that type in your code not Object.

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