'Externalizable' class without 'public' no-arg constructor

Reports Externalizable classes without a public no-argument constructor.

When an Externalizable object is reconstructed, an instance is created using the public no-arg constructor before the readExternal method called. If a public no-arg constructor is not available, a java.io.InvalidClassException will be thrown at runtime.

Locating this inspection

By ID

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

ExternalizableWithoutPublicNoArgConstructor

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

Availability

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