枚举，单身和反序列化

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。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。

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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