Inspectopedia 2025.2 Help

'hashCode()' called on array

Reports incorrect hash code calculation for arrays.

In order to correctly calculate the hash code for an array, use:

  • Arrays.hashcode() for linear arrays

  • Arrays.deepHashcode() for multidimensional arrays

These methods should also be used with Objects.hash() when the sequence of input values includes arrays, for example: Objects.hash(string, Arrays.hashcode(array))

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.

ArrayHashCode
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

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 ArrayHashCode

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

Inspection Details

By default bundled with:

IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025