Local variable or parameter can be 'final'

Last modified: 03 December 2024

Reports parameters or local variables that may have the final modifier added to their declaration.

Example:

ArrayList<Integer> list = new ArrayList();
fill(list);
return list;

After the quick-fix is applied:

final ArrayList<Integer> list = new ArrayList();
fill(list);
return list;

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.

LocalCanBeFinal
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 | Code style issues

Use the inspection's options to define whether parameters or local variables should be reported.

Inspection options

Here you can find the description of settings available for the Local variable or parameter can be 'final' inspection, and the reference of their default values.

Report local variables

Default: Selected

Report method parameters

Default: Selected

Report catch parameters

Default: Selected

Report foreach parameters

Default: Selected

Report variables which are implicitly final<br/>(multi-catch or try-with-resources parameters)

Default: Selected

Report pattern variables

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