Type parameter hides visible type

Reports type parameters that have the same names as the visible types in the current scope. Such parameter names may be confusing.

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.

TypeParameterHidesVisibleType

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 | Visibility

Example:

  abstract class MyList<T> extends AbstractList<T> {
    private List<T> elements;
    // type parameter 'T' hides type parameter 'T'
    public <T> T[] toArray(T[] array) {
        return elements.toArray(array);
    }
}

Inspection ID: TypeParameterHidesVisibleType

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 TypeParameterHidesVisibleType

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025