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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




Ignore subclasses of



Ignore if annotated by



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