@NotNull field is not initialized

Last modified: 03 December 2024

Reports fields annotated as not-null that are not initialized in the constructor.

Example:

public class MyClass {
  private @NotNull String value;

  public void setValue(@NotNull String value) {
    this.value = value;
  }

  public @NotNull String getValue() {
    return value;
  }
}

Such fields may violate the not-null constraint. In the example above, the setValue parameter is annotated as not-null, but getValue may return null if the setter was not called.

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.

NotNullFieldNotInitialized
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 | Probable bugs | Nullability problems

Inspection options

Here you can find the description of settings available for the @NotNull field is not initialized inspection, and the reference of their default values.

Ignore fields which could be initialized implicitly

Default: Selected

Ignore fields initialized in setUp() method

Default: Selected

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Java, 243.23126