为什么将Hashtable的table属性序列化? [英] Why is the table attribute of Hashtable serialized?

问题描述

为什么Hashtable的table字段被序列化了，尽管它被标记为transient?

Why is the table field of Hashtable serialized, although it is marked as transient?

推荐答案

它被标记为瞬态的，因为在Entry数组上使用默认的序列化方案是不安全的.相反，当对哈希表进行反序列化时，必须重新哈希表中的键，并且必须根据新的哈希码值将条目添加到插槽中.这是必要的，因为在进行反序列化之后，密钥可能具有不同的哈希码……出于各种原因.这项工作将通过Hashtable的readObject()方法完成.

It is marked as transient because it is unsafe to use the default serialization scheme on the Entry array. Rather, when a Hashtable is deserialized, the keys in the table must be rehashed and the entries must be added to slots according to the new hashcode values. This is necessary because the keys may have different hashcodes after deserialization ... for a variety of reasons. This work will be done by Hashtable's readObject() method.

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