Why can serialize objects to define serialversionUID value?

• SerialVersionUid to serialize objects version control, tell compatible when deserializing JVM versions
• If this value is changed in the new version, the new version is not compatible with older versions, it will throw an exception InvalidClassException deserialization
• Increased by only one attribute, we hope backward compatible with older versions of data are retained, do not modify
• To delete an attribute, or change the class hierarchy, can not fail to be compatible with old data, then you should manually update SerialVersionUid

 

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