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Non-serializable field in a 'Serializable' class

Reports non-serializable fields in classes that implement Such fields will result in runtime exceptions if the object is serialized.

Fields declared transient or static are not reported, nor are fields of classes that have a writeObject method defined.

This inspection assumes fields of the types java.util.Collection and java.util.Map to be Serializable, unless the types they are declared in are non-Serializable.


class NonSerializableClass {} public class SerializableClass implements Serializable { NonSerializableClass clazz; // warning: Non-serializable field 'clazz' in a Serializable class static NonSerializableClass staticClazz; // no warnings }

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.

  • List annotations that will make the inspection ignore the annotated fields.

  • Whether to ignore fields initialized with an anonymous class.

Inspection options

Here you can find the description of settings available for the Non-serializable field in a 'Serializable' class inspection, and the reference of their default values.

Ignore subclasses of


Ignore if annotated by


Ignore anonymous classes

Not selected

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024