Question

从我在线读到,为某类人制作一个序列版的身份证似乎是一种良好做法。

我的问题是,在申请中,我是否必须为每一类人建立一个独特的身份证?

Or can I simply assign the following ID to each class in my application?

<条码> 自动终端终端终端序列VersionUID = 1;

Answer 1

You only need a serial version ID for classes that will be serialized, i.e. mostly those that implement Serializable
The ID is per class, it s not a problem if two classes have the same
It s only necessary if there is a chance that serialized instances will be deserialized by a different version of the program. This is often not the case.

Answer 2

无,它就特定类别而言,并不重要,而是按序版(for该类别>)。班级名称本身仍按序排列,因此,在all各班之间不必独一无二。 (当然,你可<>>找到其他办法,使每一类的版本数目不同。) 我可以直截了当,但这是一个不同的问题。

使用固定价值是罚款,但do <>/em>需要确保你在你真正改变序列化格式(例如增加一个领域)时改变这一格式。

Mind you, I d prefer to use something like Protocol Buffers which is rather more graceful with backward/forward compatibility :)

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