Inspectopedia
 
2024.3

'instanceof' with incompatible type

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Last modified: 03 December 2024

Reports instanceof expressions where the expression that is checked has a class/interface type that neither extends/implements the class/interface type on the right-side of the instanceof expression, nor has subclasses that do.

Although it could be intended for e.g. library code, such a construct is likely erroneous, because no instance of any class declared in the project could pass this instanceof test.

Example: