Possible heap pollution from parameterized vararg type

Reports methods with variable arity, which can be annotated as @SafeVarargs. The @SafeVarargs annotation suppresses unchecked warnings about parameterized array creation at call sites.

Example:

  public class Foo<T> {
    private List<T> list = new ArrayList<>();

    public final void safeVarargs(T... elements) {
      Collections.addAll(list, elements);
    }
  }

After the quick-fix is applied:

  public class Foo<T> {
    private List<T> list = new ArrayList<>();

    @SafeVarargs
    public final void safeVarargs(T... elements) {
      Collections.addAll(list, elements);
    }
  }

This annotation is not supported under Java 1.6 or earlier JVMs.

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.

unchecked

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.

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 unchecked

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