Confusing primitive array argument to varargs method

Reports any calls to a variable arity method where the call has a primitive array in the variable arity parameter position (for example, System.out.printf("%s", new int[]{1, 2, 3})). Such a primitive-array argument may be confusing, as it will be wrapped as a single-element array, rather than each individual element being boxed, as might be expected.

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.

PrimitiveArrayArgumentToVariableArgMethod

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

Example:

String.format("%s", new int[]{1, 2, 3});

After the quick-fix is applied:

String.format("%s", (Object) new int[]{1, 2, 3});

This inspection depends on the Java feature 'Variable arity methods' which is available since Java 5.

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