The Enum class is Serializable so there is no problem to serialize object with enums. The other case is where class has fields of java.util.Optional class. In this case the following exception is thrown: java.io.NotSerializableException: java.util.OptionalThe Enum class is Serializable so there is no p
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为什么java.util.Optional不是Serializable，如何使用这些字段序列化对象
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