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.

Example:

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
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023