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Serializable non-static inner class without 'serialVersionUID'

Reports non-static inner classes that implement, 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.


class Outer { class Inner implements Serializable {} }

After the quick-fix is applied:

class Outer { class Inner implements Serializable { private static final long serialVersionUID = -7004458730436243902L; } }

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.

Inspection options




Ignore subclasses of



Ignore anonymous inner classes



Inspection Details

Available in:

IntelliJ IDEA 2023.3, Qodana for JVM 2023.3


Java, 233.SNAPSHOT

Last modified: 13 July 2023