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Assignment to method parameter

Reports assignment to, or modification of method parameters.

Although occasionally intended, this construct may be confusing and is therefore prohibited in some Java projects.

The quick-fix adds a declaration of a new variable.

Example:

void printTrimmed(String s) { s = s.trim(); System.out.println(s); }

After the quick-fix is applied:

void printTrimmed(String s) { String trimmed = s.trim(); System.out.println(trimmed); }

Use the Ignore if assignment is a transformation of the original parameter option to ignore assignments that modify the parameter value based on its previous value.

Inspection options

Here you can find the description of settings available for the Assignment to method parameter inspection, and the reference of their default values.

Ignore if assignment is a transformation of the original parameter

Not selected

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024