枚举，单身和反序列化 [英] Enums, Singletons and Deserialization

问题描述

枚举被认为是单身人士的最佳方法，其中一个原因是它隐式地继承可序列化。

但是枚举如何防止单例的反序列化问题？

解决方案

序列化机制在特殊的具体方式。但传统的单例可以通过定义返回唯一实例的 readResolve（）方法来反序列化。有关示例，请参阅 http://www.oodesign.com/singleton-pattern.html 。

Enums are considered best way for singletons and one of reasons for this is that it implicitly inherits Serializable.

But how enums prevents de-serialization problem of singletons?

解决方案

The serialization mechanism handles them in a special, specific way. But traditional singletons can be deserialized fine by defining a readResolve() method that returns the unique instance. See http://www.oodesign.com/singleton-pattern.html for an example.

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