Standard 'hashCode()' method can be used

Reports bitwise operations that can be replaced with a call to the Long.hashCode() or Double.hashCode() methods. It detects the construct (int)(x ^ (x >>> 32)) where x is a variable of type long or the result of a previous Double.doubleToLongBits() call. The replacement shortens the code, improving its readability.

Example:

int result = (int)(var ^ (var >>> 32));

After applying the quick-fix:

int result = Long.hashCode(var);

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.

UseHashCodeMethodInspection

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.

This inspection only reports if the language level of the project or module is 8 or higher.

New in 2024.1

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 UseHashCodeMethodInspection

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