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Instance field may not be initialized by 'readObject()'

Reports fields that are not guaranteed to be initialized after the object is deserialized by the readObject() method.

The inspection doesn't report transient fields.

Note: This inspection uses a very conservative control flow algorithm, and may incorrectly report fields as uninitialized.


class DataObject implements Serializable { String s; // s is not initialized in readObject int i; private void readObject(ObjectInputStream stream) throws IOException { i = stream.readInt(); } }

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Serialization issues


By default bundled with

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin

Java, 241.18072

Last modified: 18 June 2024