Value passed as parameter never read

Reports redundant method parameters that can be replaced with local variables.

If all local usages of a parameter are preceded by assignments to that parameter, the parameter can be removed and its usages replaced with local variables. It makes no sense to have such a parameter, as values that are passed to it are overwritten. Usually, the problem appears as a result of refactoring.

Example:

  void test(int p) {
    p = 1;
    System.out.print(p);
  }

After the quick-fix is applied:

  void test() {
    int p = 1;
    System.out.print(p);
  }

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.

ParameterCanBeLocal

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 | Class structure

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024