Inspectopedia 2025.2 Help

Inner class of interface

Reports inner classes in interface classes.

Some coding standards discourage the use of such classes. The inspection doesn't report enum classes and annotation interfaces.

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.

InnerClassOfInterface
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 | Class structure

Use the Ignore inner interfaces of interfaces option to ignore inner interfaces. For example:

interface I { interface Inner { } }

Inspection options

Here you can find the description of settings available for the Inner class of interface inspection, and the reference of their default values.

Ignore inner interfaces of interfaces

Default value:

Not selected

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection InnerClassOfInterface

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025