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2024.3

Serializable non-static inner class without 'serialVersionUID'

Warning
Last modified: 03 December 2024

Reports non-static inner classes that implement java.io.Serializable, but do not define a serialVersionUID field.

Without a serialVersionUID field, any change to the class will make previously serialized versions unreadable. It is strongly recommended that Serializable non-static inner classes have a serialVersionUID field, otherwise the default serialization algorithm may result in serialized versions being incompatible between compilers due to differences in synthetic accessor methods.

A quick-fix is suggested to add the missing serialVersionUID field.

Example:

After the quick-fix is applied:

Use the following options to configure the inspection:

  • List classes whose inheritors should not be reported by this inspection. This is meant for classes that inherit Serializable from a superclass but are not intended for serialization.

  • Whether to ignore Serializable anonymous classes.