关于Java cloneable [英] About Java cloneable

问题描述

我正在寻找一些解释Java Cloneable 的教程，但没有得到任何好的链接，而Stack Overflow正变得越来越明显。

I was looking for some tutorials explaining about Java Cloneable, but did not get any good links, and Stack Overflow is becoming more obvious choice anyways.

我想知道以下内容：

1. Cloneable 意味着我们可以通过
   实现 Cloneable 接口来获得克隆或对象副本。这样做有什么好处和
   的缺点？


2. 如果对象是
   复合对象，如何进行递归克隆？

1. Cloneable means we can have a clone or a copy of objects, by implementing the Cloneable interface. What are the advantages and disadvantages of doing that?
2. How does the recursive cloning happen if the object is a composite object?

推荐答案

你应该知道的关于 Cloneable 的第一件事是 - 不要使用它。

The first thing you should know about Cloneable is - don't use it.

使用 Cloneable 实现克隆是非常困难的，并且努力是不值得的。

It is very hard to implement cloning with Cloneable right, and the effort is not worth it.

而不是使用其他一些选项，例如apache-commons SerializationUtils （深度克隆）或 BeanUtils （浅层克隆），或者只是使用复制构造函数。

Instead of that use some other options, like apache-commons SerializationUtils (deep-clone) or BeanUtils (shallow-clone), or simply use a copy-constructor.

请参阅此处，了解Josh Bloch关于克隆<$ c的观点$ c> Cloneable ，这解释了该方法的许多缺点。 （ Joshua Bloch 是Sun的一名员工，并领导了众多Java功能的开发。）

See here for the views of Josh Bloch about cloning with Cloneable, which explains the many drawbacks of the approach. (Joshua Bloch was a Sun employee, and led the development of numerous Java features.)

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