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Casting to incompatible interface

Reports type cast expressions where the cast type is an interface and the cast expression has a class type that neither implements the cast interface, nor has any visible subclasses that implement the cast interface.

Although this might be intended, such a construct is most likely an error, and will result in a java.lang.ClassCastException at runtime.


interface A {} interface Z {} static class C {} void x(C c) { if (c instanceof Z) { A a = ((A)c); // cast to incompatible interface 'A' } }

Inspection Details

Available in:

IntelliJ IDEA 2023.3, Qodana for JVM 2023.3


Java, 233.SNAPSHOT

Last modified: 13 July 2023