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Java Object Serialization Specification: 5 - Versioning of Serializable Objects - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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5.2 Goals

The goals are to:

  • Support bidirectional communication between different versions of a class operating in different virtual machines by:
  • Defining a mechanism that allows JavaTM classes to read streams written by older versions of the same class.
  - Defining a mechanism that allows JavaTM classes to write streams intended to be read by older versions of the same class.
  • Provide default serialization for persistence and for RMI.
  • Perform well and produce compact streams in simple cases, so that RMI can use serialization.
  • Be able to identify and load classes that match the exact class used to write the stream.
  • Keep the overhead low for nonversioned classes.
  • Use a stream format that allows the traversal of the stream without having to invoke methods specific to the objects saved in the stream.


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