Suspicious collection method call

Reports method calls on parameterized collections, where the actual argument type does not correspond to the collection's elements type.

Example:

  List<Integer> list = getListOfElements();
  list.remove(""); // remove is highlighted

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.

SuspiciousMethodCalls

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

In the inspection settings, you can disable warnings for potentially correct code like the following:

  public boolean accept(Map<Integer, String> map, Object key) {
    return map.containsKey(key);
  }

Inspection options

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

Report suspicious but possibly correct method calls: Default value:
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 SuspiciousMethodCalls

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