Static collection

Reports static fields of a Collection type. While it's not necessarily a problem, static collections often cause memory leaks and are therefore prohibited by some coding standards.

Example:

  public class Example {
    static List<String> list = new ArrayList<>();

  }

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.

StaticCollection

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 | Memory

Configure the inspection:

Use the Ignore weak static collections or maps option to ignore the fields of the java.util.WeakHashMap type.

Inspection options

Here you can find the description of settings available for the Static collection inspection, and the reference of their default values.

Ignore weak static collections or maps: 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 StaticCollection

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