Non-final field in '@Immutable' class

Reports any non-final field in a class with the @Immutable annotation. This violates the contract of the @Immutable annotation.

Example:

  import javax.annotation.concurrent.Immutable;
  @Immutable
  class Foo {
    String bar = "foo";
  }

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.

NonFinalFieldInImmutable

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 | Concurrency annotation issues

Supported @GuardedBy annotations are:

net.jcip.annotations.GuardedBy
javax.annotation.concurrent.GuardedBy
org.apache.http.annotation.GuardedBy
com.android.annotations.concurrency.GuardedBy
androidx.annotation.GuardedBy
com.google.errorprone.annotations.concurrent.GuardedBy

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 NonFinalFieldInImmutable

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

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025